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1Back to top Go down    K1100 ecu into K100. on Tue Jul 10, 2012 6:14 am

caferacer62

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I have a question for the boffins on here, can a K1100 ecu be grafted onto a K100? I know it would be wise to use the K1100 throttle body setup as well.

I know this may be a daft question but it is something i have been pondering for a while, I did mention it to Charlie99( resident lectric guru) and he mentioned he didn't think it was possible. I don't doubt that he is wrong, but i just thought i would put the question out there.
It also seems to be a neat way to be rid of the Air Flow Meter.

Please feel free to tell me i need to get back on my medication, you wouldn't be the first Smile


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2Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 7:14 am

charlie99

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not impossible bert ....just a few things you might need ....."ox" sensor in the exhaust ...., airbox and newer style plenum bits electronics etc .maybe a wiring change to the injectors also ....the main injection computer(dont know if its integrated with the injection control computer )but trends about that time did so ...
coils are slightly different also
i recon rickg, inge , robmack and a few others could help on that one


maybe a k1100- wreck would be a good start for all the bits ?


cheers


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'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

3Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 8:35 am

Inge K.

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Everything you want can be done (even miracles.........but that`s expensive),
it`s a question about how much time and money you are willing to throw into
the project.

Easiest would be a complete wiring system with the relay box, air temp sensor,
water temp sensor......and already mentioned TB`s, TPS and air filter box.

I guess it would function with genuine coils slighty higher primary resistance,
but it would be happier to work with the coils it`s designed for.
Then you must change coils, HT leads and sparkies.

Then you got Motronic MA 2.1 and MA 2.2 (the change was 07/93),
both with and w/o a cat, but all different ECU`s.

If you going for a MA 2.1, you also need the amplifier mounted between the Motronic unit and the coils.
If you going for a model w/o cat, you need a small unit with a pot meter which is mounted in front of the relay box......to adjust the CO.


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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

4Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 9:39 am

88

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Having read Inke's post I think you'll agree, Bert 2.0....... The Meds are cheaper! Wink


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88....May contain nuts!

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

5Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 10:20 am

RicK G

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Easier to buy a K1100 Bert


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

6Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 10:26 am

blaKey

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Thank goodness someone said it...


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Neil
K100RS 1986 RED!
K100RT 1987 (now nekkid with red bits)

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7Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 10:30 am

Two Wheels Better

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...but imagine if we didn't wonder about anything. Where would we be? On meds and doing nothing much interesting.


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'77 R75/7-1000cc, '87 K100RS, '93 K12 Big Block, '94 R100 Mystic, '03 K1200GT, '04 R1150RT, '06 K1200R, '07 K1200R & '09 K1300GT
Two Airheads, three Bricks, an Oilhead and a trio of new K's.
    

8Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 10:44 am

RicK G

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If we didn't think about changing things for more neddies then Model T Fords would be the go still


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

9Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 10:49 am

Inge K.

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And only in black.............then Blakey would have.............


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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

10Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 10:59 am

RicK G

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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

11Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 11:11 am

blaKey

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then Blakey would have.............
...not bought one.

Nothing ventured, nothing gained.


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Neil
K100RS 1986 RED!
K100RT 1987 (now nekkid with red bits)

Remember Rule No. 6
    

12Back to top Go down    Re: K1100 ecu into K100. on Tue Jul 10, 2012 11:18 am

Inge K.

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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

13Back to top Go down    Re: K1100 ecu into K100. on Wed Jul 11, 2012 6:30 am

caferacer62

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Maybe i'll just wait until GITH brings that tasty K1100rs back from the States with him. Very Happy

Thanks for all the replies guys, i had a gut feeling it was too much work to be worth it. But i had to ask as its been bothering me for a while.
Brain never stops ticking over about mods not meds.


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Bert 2.0

Don't give in to the Black Dog!
"A Zorst, a zorst my kingdom for a Zorst"

    

14Back to top Go down    Re: K1100 ecu into K100. on Wed Jul 11, 2012 7:19 am

K75cster

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The people with workshops that are for the people with brains ticking over on or about meds are usually the workshops we arn't interested in. but a workshop with bikes in it well that's another story


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The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

15Back to top Go down    Re: K1100 ecu into K100. on Wed Jul 11, 2012 7:31 am

K75cster

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We have had a query on 75 series pistons into a 100 now 1100 tb's and wiring to up the anti, there is a trend here but where is it going ? are you after a giant shove in the pants when you open the throttle? is it greater finesse? Is it the sense of achievement from getting better fuel economy or greater power, most of us have this feeling this wondering, it must be human nature, but what are the expectations what do you want to achieve????? I mean I like the idea of fiddling to do it and have it work exceptionally well thats a real buzz, What was the ecu theory bert?????


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

16Back to top Go down    Re: K1100 ecu into K100. on Thu Jul 12, 2012 5:42 am

caferacer62

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Short answer K75, getting rid of the AFM. I know the K100 goes just fine with it and all that.

But if an AFM was a wonderful thing why did BMW delete it on the 1100? Because the later ecu is mafless and is better at doing what it needs to.

It really isn't an option unless i could buy a wrecked K1100 really cheap and transplant everything over, but then you may as well transplant the engine as well.
Or as Rick stated why not just by a K1100. As i said sometimes the old grey matter runs away on a tangent of what ifs.
If no-one modified bikes/cars i wouldn't have had the great experiences that i have had working on peoples toys over the years.


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Bert 2.0

Don't give in to the Black Dog!
"A Zorst, a zorst my kingdom for a Zorst"

    

17Back to top Go down    Re: K1100 ecu into K100. on Thu Jul 12, 2012 5:56 am

charlie99

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i guess you could go buy a micro squirt ...or mega squirt and do the mods yourself .....im sure ive seen some mapping uploads on their site


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

18Back to top Go down    Re: K1100 ecu into K100. on Thu Jul 12, 2012 6:07 am

caferacer62

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Good thinking Charlie.
I think Haltech does a fuel only ecu as well as Bazzaz. When i was at the bike shop we fitted a couple of the Bazzaz units and they are pretty good. I think the fuel only one was about $450.

I might do some more research.


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Bert 2.0

Don't give in to the Black Dog!
"A Zorst, a zorst my kingdom for a Zorst"

    

19Back to top Go down    Re: K1100 ecu into K100. on Thu Jul 12, 2012 6:29 am

charlie99

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prolly not worth it for a fuel only unit bert ..not much more and you got it all ...besides perhaps finding one on ebay ....erm maybe


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

20Back to top Go down    Re: K1100 ecu into K100. on Sat Jul 14, 2012 6:51 am

K75cster

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Bert i was angling as i was hanging off the side of this thread just incase you were thinking of supercharging something. I figured it would need a replacement for the map flap and maybe the ecu so kept listening just in case. Over this last week it became apparent that using the K100 pistons at 10.2:1 and a small supercharger would make the 75 a right buz to operate. not this year but one must have a goal


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

21Back to top Go down    Re: K1100 ecu into K100. on Tue May 26, 2015 11:49 pm

floyd

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time to revive an oldie....!

Im curious about this....basically im unhappy with the le-jettronic fuel economy and am considering my option to improve it.

Of course, I could just buy an 1100 (wish Id done an 1100 in the first place in many ways, or at least based the bike around motronic from the start)

I have many of the 1100 bits on hand. I got rid of some that I maybe should not have, but hey...live and learn....

I have:

- TB's and injectors
- coils and HT leads
- air box/plenum thingy
- air temp sensor
- water temp sensor and stub
- TPS
- ECU (I think/HOPE)

dont have:
- wiring loom


what else would be required?
would you need the 1100 ignition control module?
I know there would need to be some wiring loom hacking to get the 1100 engine loom and the 100 chassis loom to mate.
How about the o2 sensor? could an 1100 exhaust system be utilised? or maybe an 1100 staintune


before we go any further......
would using the 1100 airbox on the 8v head work (with its different injector ports and manifold rubbers) ???

The 100 manifold rubbers are shorter than the 1100's I think.

hmm wish I could find another $500 K1100...... Wink



Last edited by floyd on Wed May 27, 2015 12:51 am; edited 1 time in total


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K100 with lots of K1100 bits - mongrel of a thing...
    

22Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 12:28 am

Two Wheels Better

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There are heaps of issues to contend with. I'll start by asking a few basic questions to illustrate the point. What will you plug the 8V injector holes in the head with since 16V are intake rubber port injected? There's early and late K11 Motronic 2.1, also with and without catalyst and O2 sensor, plus ignition module, each having different engine and chassis looms, so how easy will it be to source the correct components? Then there's later K11 Motronic 2.2 to consider. Having access to a variety of wrecks will make it easier. It can be done, but it's a fair few twists and turns in that road.


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'77 R75/7-1000cc, '87 K100RS, '93 K12 Big Block, '94 R100 Mystic, '03 K1200GT, '04 R1150RT, '06 K1200R, '07 K1200R & '09 K1300GT
Two Airheads, three Bricks, an Oilhead and a trio of new K's.
    

23Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 12:48 am

floyd

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@Two Wheels Better wrote:There are heaps of issues to contend with. I'll start by asking a few basic questions to illustrate the point. What will you plug the 8V injector holes in the head with since 16V are intake rubber port injected?
Yep, that was one of my questions above. perhaps the only option is to use a longer 'bushing' (#5) between the upper airbox's rubber stubs and the top of the TB's. Then obviously using the K100 manifold stubs on the bottom





There's early and late K11 Motronic 2.1, also with and without catalyst and O2 sensor,plus ignition module, each having different engine and chassis looms, so how easy will it be to source the correct components?
Im pretty sure all my bits are off a 92 or 93 model - so 2.1 with no cat or o2 sensor i believe. So id just need to get a suitable ECU (if i cant find mine...it should be there...) and wiring loom.

Then there's later K11 Motronic 2.2 to consider. Having access to a variety of wrecks will make it easier. It can be done, but it's a fair few twists and turns in that road.


I just want better fuel consumption is all....in the cheapest way possible....and i have quite a few of the required misc bits to pursue this option it seems.....especially if i have the ECU in working order. Then all I need is the loom ($100) and maybe some other stuff....plus some smarts and hard work...


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K100 with lots of K1100 bits - mongrel of a thing...
    

24Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 1:01 am

RicK G

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I have a loom and have given up on a motronic on the chookie because of the 3 to 3 cylinder conversion problems.
Don't see why you would need to use the K1100 fuel rail and plug the K100 injector holes. I would just replace the K100 injectors with K1100. You don't need an O2 sensor just the adjustment on the front of the relay box and you could use the K100 air box just remove the MAF sensor and plug the holes as the moronic doesn't have a MAF sensor.
Leave the K100 exhaust as that gives more low end torque.
I don't see any big problems with doing it.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

25Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 1:06 am

floyd

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@RicK G wrote:Don't see why you would need to use the K1100 fuel rail and plug the K100 injector holes. I would just replace the K100 injectors with K1100.

Could you please elaborate on that mate? Dont follow those 2 sentences at all.

Are you saying just use the stock K100 plenum with K1100 injectors and TB's?

OR

Are you saying to plug the injector holes in the K100 head and use the K1100 injector/TB manifold set up

or something else entirely?


What about the K1100 air temp sensor? and whats the 'adjustment of the front of the relay box'?

thanks all!


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K100 with lots of K1100 bits - mongrel of a thing...
    

26Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 1:52 am

RicK G

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The K1100 has the injectors in the manifolds below the TBs. you wouldn't need to put them there but where the K100 injectors are located. The K1100 has a different fuel rail due to the location of the injectors.
Use the K100 plenum and K1100 TBs if you want but I would be inclined to use the K100 TBs because it will give better low end torque.
The K1100 doesn't have a MAF sensor (air flow meter) and leave the K100 air box or replace with K1100 air box either will work as long as you have the air temp sensor from K1100.
The adjuster on the relay box is for CO2 adjustment at idle and replaces the O2 sensor on the exhaust and your Moronic will have the adjuster as it was 1992 model.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

27Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 4:22 am

floyd

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sweeeet

Im pretty sure I have nearly everything required....but as usual its all a million miles away and will be a while till I get check and get this happening.

I know I need a wiring harness and probably the co2 pot.

Im unsure if I have an ECU - but I should have. Same with the ignition module. Should have it, but not totally sure.

But everything else I have. Even the proper battery mount for the ignition module thingy. Got the water and temp sensors, TPS, injectors, FPR....

Which FPR should be used? hmmm this is going to be fun....

Hopefully the K1100 air temp sensor can be mounted easily in the K100 airbox. Ill remove the AFM and seal the holes in the airbox.
Use the 1100 TBs, injectors and TPS, mounted in the 100 manifold stubs, plenum and fuel rail.
Use the 1100 water temp sensor and engine stub
Use the 1100 coils and leads with the pre 93 ignition module.

Interesting....

wonder how it would run, and what the milage would be like....


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28Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 4:25 am

charlie99

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sounds like a plan Floyd

interested to see how this turns out


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

29Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 5:59 am

Gaz

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Floyd, good to see that brain of yours is ticking over at quite a rate thinking about things that might be fun for you rather than brooding over other issues.

As I'm just a rider sort of guy rather than someone who would take on these sorts of ideas (I'm not as brave as you are Floyd) I'd have to ask the question of how much you will improve the fuel consumption which then translates into dollars per year for the amount of kilometres you might do. Is it really worth it?

Having asked that question, I'll be the first to admit that I don't evaluate the cost of my motorcycle spending.
Have fun mate! I'm looking forward to the time when we can catch up again.

Cheers


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95 K1100LT 0232224; 90 K75 6427509; 87 R80G/S PD 6292136
    

30Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 6:12 am

floyd

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Gaz80 wrote:Floyd, good to see that brain of yours is ticking over at quite a rate thinking about things that might be fun for you rather than brooding over other issues.

As I'm just a rider sort of guy rather than someone who would take on these sorts of ideas (I'm not as brave as you are Floyd) I'd have to ask the question of how much you will improve the fuel consumption which then translates into dollars per year for the amount of kilometres you might do. Is it really worth it?

Having asked that question, I'll be the first to admit that I don't evaluate the cost of my motorcycle spending.
Have fun mate! I'm looking forward to the time when we can catch up again.

Cheers


cheers Gaz, thanks for the comment mate.

Great question too. The answer is, it would most certainly not be worth it if you were to go out and buy all the bits one by one....But I think Ive got it all on hand (except for the harness - but they are not prohibitively expensive). If I dont have the ECU, well it may be a deal breaker. (although maybe not....if the efficiency increase is high enough)

Im veeeery curious to know what the milage would be too. But my current milage is crap. about 14.5km/L. maybe 15.5 if im veeery grandfatherly. Ive heard the 1100 gets more like 21-22km/L. If I could get 19-20km/L (I dont know how realistic that is....) thats about an improvement of 1/3.

So considering Ill pay very little for the exercise, and I could get an impressive increase in efficiency...worth a go, no?

Anyone got any other suggestions to get the milage of the K100 as good as can be, for very little bickies?


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31Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 7:47 am

robmack

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@floyd wrote:Anyone got any other suggestions to get the milage of the K100 as good as can be, for very little bickies?
Replace the ECU with a more modern equivalent where you can vary fueling, ignition timing, temp compensation, etc. On Motobrick, one member fitted a Megasquirt to a K75. It worked and he managed to significantly improve fueling as a result. It wasn't as intrusive as you're suggesting with the Motronic 2.2 refit. There were some advantages such as converting the FI to closed loop, data logging capability, precise timing and fueling, and others. The leftover bit was designing and building a crank position sensor with more capability than is available with the HES on the K-bikes.


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32Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 8:22 am

RicK G

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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

33Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 6:36 pm

floyd

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@robmack wrote:
@floyd wrote:Anyone got any other suggestions to get the milage of the K100 as good as can be, for very little bickies?
Replace the ECU with a more modern equivalent where you can vary fueling, ignition timing, temp compensation, etc. On Motobrick, one member fitted a Megasquirt to a K75. It worked and he managed to significantly improve fueling as a result. It wasn't as intrusive as you're suggesting with the Motronic 2.2 refit. There were some advantages such as converting the FI to closed loop, data logging capability, precise timing and fueling, and others. The leftover bit was designing and building a crank position sensor with more capability than is available with the HES on the K-bikes.


Sure....or just drop 1300 pound onthis bad boy!


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34Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 8:11 pm

floyd

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hmmmm RickG and robmac.....thanks for the brain fuel while Im stuck here in my padded cell.

Wonder why the microsquirt conversion is not more common on K100/75s? This is a new area of learning for me....but from my initial reading it does not seem that difficult or expensive actually and the gains seem to be well worth it.....

There are many systems that I only know the bare enough about to have got them working on my bike. A Project like this seems like an excellent way to learn all about efi and tuning.

Soooooo thinking out loud here...a basic micro squirt set up could involve:

- my current set up of k1100 injectors and TB's
- K1100 TPS
- K1100 air temp sensor installed in K100 airbox or plenum.
- K100 Air Flow Meter (or a modern car MAP sensor fitted in place.See Halo's work here )
- Skip the o2 exhaust sensor for now
- Keep stock ignition for now, and drive the microsquirt off the coils
- ummm what else?

So the new ECU is about $300, if you dont have them you need the K1100 bits...some new wiring....

That would potentially pay for its self in maybe 30-50 fuel ups. Not many up grades pay them selves off....


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35Back to top Go down    Re: K1100 ecu into K100. on Wed May 27, 2015 8:29 pm

floyd

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Km per LL used per tank$AUD per L$ per tankKm per tank$ per Km
Stock1418$1.40$25.20252$0.10
Upgrade1918$1.40$25.20342$0.07
Therefore: The upgraded ECU could get an extra 90kms per tank of fuel. To get the same 90kms on the stock bike would cost the rider an extra $9.

If the upgrade cost $500, based on the increase in fuel efficiency, the return on investment would be 55 re fuels. So perhaps 1 year for a regular rider.


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36Back to top Go down    Re: K1100 ecu into K100. on Thu May 28, 2015 12:15 am

charlie99

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we don't always do any upgrade and expect that it will equate to saved fuel and cost .....cheeky grin

but it makes sense if you can get along the road knowing you have made something a little different ...and tailored to your needs

I expect the mapping for the fuel- air mix will be a little different k100 8 valve to 16 valve ...would be good to consider that there may be some feedback from a ox sensor though ... just a thought


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'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

37Back to top Go down    Re: K1100 ecu into K100. on Thu May 28, 2015 3:12 am

charlie99

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there are o2 controller available that will convert wideband to narrow band outputs ....which is probably what the motronic uses

the reason for mentioning it is the different stoichiometric values of premium and ulp which vary 14.7 and 14.1 ...round about

the wideband gives a pretty linear output 0 -5 voltbutthe row band is rather restricted and big knee curve at about 1 volt

here a link worth viewing ....warning highly technical jargon http://wbo2.com/2j/default.htm


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

38Back to top Go down    Re: K1100 ecu into K100. on Thu May 28, 2015 9:03 am

Motorbike Mike

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Now then chaps.
I'm at the end of modifying my 8v K100 and used the 8 valve motor because it only had 30,000 miles on it. I also had at the time a 16v K100 that had 110,000 miles on it. I've basically merged the two,plus some other bits to base my Cobas K100R-see elsewhere on the forum.
The end article has K75 pistons,high lift cams,balanced crank,ported heads and 1100 oil/water pump.
On the electrical/fuel side,I used 1100 TB's onto 8v rubbers and used the original injector ports. I also used the 16v wiring loom so I could use the K100 16v Motronic ECU and drilled a hole in the 8v air box to get the air temp sensor where it should be. There is no Lambda sensor on the K100 16v.
It goes very well but with all the mods,the fueling is all over the place and when it's had another set of headers made,it's off for fuel mapping on the Dyno. The 1100 TB's seemed to smooth the engine out a fair bit.
K100 16v or early K1100 wiring looms are what's required here.

Anything's possible with the right parts to hand. Laughing

    

39Back to top Go down    Re: K1100 ecu into K100. on Thu May 28, 2015 6:36 pm

floyd

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@Motorbike Mike wrote:Now then chaps.
I'm at the end of modifying my 8v K100 and used the 8 valve motor because it only had 30,000 miles on it. I also had at the time a 16v K100 that had 110,000 miles on it. I've basically merged the two,plus some other bits to base my Cobas K100R-see elsewhere on the forum.
The end article has K75 pistons,high lift cams,balanced crank,ported heads and 1100 oil/water pump.
On the electrical/fuel side,I used 1100 TB's onto 8v rubbers and used the original injector ports. I also used the 16v wiring loom so I could use the K100 16v Motronic ECU and drilled a hole in the 8v air box to get the air temp sensor where it should be. There is no Lambda sensor on the K100 16v.
It goes very well but with all the mods,the fueling is all over the place and when it's had another set of headers made,it's off for fuel mapping on the Dyno. The 1100 TB's seemed to smooth the engine out a fair bit.
K100 16v or early K1100 wiring looms are what's required here.

Anything's possible with the right parts to hand. Laughing

Very cool Mike. Thanks for the info. Are you going to write up all your engine mods in your build post?

How are you planning to remap the fuelling? I didnt think the motronic ECO was programable?

If anyone has some links to good info (like we have in the downloads sections regarding the LE-Jetronic) regarding the K1100 motronic and tuning it etc, would be greatly appreciated.


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K100 with lots of K1100 bits - mongrel of a thing...
    

40Back to top Go down    Re: K1100 ecu into K100. on Fri May 29, 2015 7:03 am

Motorbike Mike

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@floyd wrote:
@Motorbike Mike wrote:Now then chaps.
I'm at the end of modifying my 8v K100 and used the 8 valve motor because it only had 30,000 miles on it. I also had at the time a 16v K100 that had 110,000 miles on it. I've basically merged the two,plus some other bits to base my Cobas K100R-see elsewhere on the forum.
The end article has K75 pistons,high lift cams,balanced crank,ported heads and 1100 oil/water pump.
On the electrical/fuel side,I used 1100 TB's onto 8v rubbers and used the original injector ports. I also used the 16v wiring loom so I could use the K100 16v Motronic ECU and drilled a hole in the 8v air box to get the air temp sensor where it should be. There is no Lambda sensor on the K100 16v.
It goes very well but with all the mods,the fueling is all over the place and when it's had another set of headers made,it's off for fuel mapping on the Dyno. The 1100 TB's seemed to smooth the engine out a fair bit.
K100 16v or early K1100 wiring looms are what's required here.

Anything's possible with the right parts to hand. Laughing

Very cool Mike. Thanks for the info. Are you going to write up all your engine mods in your build post?

How are you planning to remap the fuelling? I didnt think the motronic ECO was programable?

If anyone has some links to good info (like we have in the downloads sections regarding the LE-Jetronic) regarding the K1100 motronic and tuning it etc, would be greatly appreciated.
Hi Floyd,
I may get around to listing the engine mods but what you've seen above is pretty much it-for now!
The re-mapping all depends on the chip you have in the ECU. I was asked to supply part numbers for the ECU and chips,with that information,I was told it was possible and had been done before.

    

41Back to top Go down    Re: K1100 ecu into K100. on Sun Jun 07, 2015 1:29 am

floyd

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For curiosities sake...

If one was to retrofit motronic 2.2 onto a 8v bike....

You would need all the 1100's sensors including the o2 sensor.
You would need to have the o2 sensor fitted to the 8v exhaust.

Would the fact there is no cat have deal-breaking implications?

cheers

floyd


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K100 with lots of K1100 bits - mongrel of a thing...
    

42Back to top Go down    Re: K1100 ecu into K100. on Sun Jun 07, 2015 3:47 am

Motorbike Mike

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Hi Floyd,
I wouldn't be able to tell you that because I used 2.1 Motronic without the Lambda sensor. All my ignition and fueling parts are from a 16 valve K100 with the K1100 TB's.

I'm taking the bike to a dyno this coming week to see what can be improved.

    

43Back to top Go down    Re: K1100 ecu into K100. on Sun Jun 07, 2015 3:56 am

charlie99

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sounds good mike

let us know the outcome huh ?

I would recon a solid boost in torque ...don't really care about the killowatts ..hp


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

44Back to top Go down    Re: K1100 ecu into K100. on Sun Jun 07, 2015 4:14 am

Motorbike Mike

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Any figures obtained wouldn't cross over to a stock K as the engine is modified. High comp pistons, ported head, high lift cams, 1100 TB's, different exhaust, lightened internals.....and it goes on!

I will report back though.

    

45Back to top Go down    Re: K1100 ecu into K100. on Sun Jun 07, 2015 4:55 am

charlie99

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yeah all the dream bitsmike ...I nearly went the k75 pistons

but finances ran short ...maybe next time


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

46Back to top Go down    Re: K1100 ecu into K100. on Tue Jun 09, 2015 3:53 am

RicK G

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@floyd wrote:For curiosities sake...

If one was to retrofit motronic 2.2 onto a 8v bike....

You would need all the 1100's sensors including the o2 sensor.
You would need to have the o2 sensor fitted to the 8v exhaust.

Would the fact there is no cat have deal-breaking implications?

cheers

floyd
The 2.2 had either a CO2 or the adjuster on the relay box. The harness I have has the adjuster and is 2.1 from a 1992 K1100


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

47Back to top Go down    Re: K1100 ecu into K100. on Tue Jun 09, 2015 11:55 am

Two Wheels Better

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@floyd wrote:For curiosities sake...

If one was to retrofit motronic 2.2 onto a 8v bike....

You would need all the 1100's sensors including the o2 sensor.
You would need to have the o2 sensor fitted to the 8v exhaust.

Would the fact there is no cat have deal-breaking implications?

cheers

floyd
From 7/93 on K11 RS & LT there were still some markets which allowed for CO adjustment with the potentiometre, instead of a catalyst, using Motronic 2.2 and no ignition amplifier. You can see the engine wiring loom listed as such in ETK if you don't select US models. Motronic 2.2 with no cat, manual CO adjustment and no O2 sensor is what I was initially hoping to achieve on my naked K12/K100.

In the end getting a clean used loom of that basic type from over the greatbloodybigocean has proved problematic, and I'm not buying new! The US market K11 models (Motronic 2.2) had no connector in the harness for a manual CO potentiometre. So I am having a bung welded into my exhaust collector for the O2 sensor and have managed to obtain from eBay a later model Mo' 2.2 engine and chassis loom since I already have the later Mo' and O2 sensor.

Let's see, what other critical piece of the puzzle are we missing? This could be done to a K100 8V, but what a project.


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'77 R75/7-1000cc, '87 K100RS, '93 K12 Big Block, '94 R100 Mystic, '03 K1200GT, '04 R1150RT, '06 K1200R, '07 K1200R & '09 K1300GT
Two Airheads, three Bricks, an Oilhead and a trio of new K's.
    

48Back to top Go down    Re: K1100 ecu into K100. on Sun Apr 03, 2016 12:27 am

floyd

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If he'll take $500, and the bits I want all look ok...reckon Ill grab this...

Motronic 2.2 and a para-lever....

Ive already got a lot of other 1100 bits on my machine....

fun project Wink


K1100 - Gumtree


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K100 with lots of K1100 bits - mongrel of a thing...
    

49Back to top Go down    Re: K1100 ecu into K100. on Sun Apr 03, 2016 3:49 am

RicK G

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I have a good 1100 block here if you wanted to put a complete 1100 in the rocket There are some parts I would like to get. PM if you are interested futher.



Last edited by RicK G on Sun Apr 03, 2016 8:15 am; edited 1 time in total (Reason for editing : Haven't got a reason it just seemed like a good idea)


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

50Back to top Go down    Re: K1100 ecu into K100. on Sun Apr 03, 2016 6:57 am

Motorbike Mike

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Jumping back in, the idea for using the 16v fueling system was to be able to remap. I had the bike on a dyno and although it made 89bhp at the rear wheel, fueling was all over the place as 8v and 16v motors just don't work the same.
The guy who's meant to be able to remap gave me the run around and unfortunately, it didn't get done.
I used the original injector ports in the head and fitted 1100 TB's into the 8 valve inlet stubs with the 1st portion of the airbox on top with fresh air feeding the 80mm-is opening.
Unless you can get the 16v ECU mapped, it's not exactly a pointless exercise but full potential can't be achieved.

I've gone for a K1100RS spec with 1200 cams, skimmed head, 1200 oil/water pump to run an oil cooler, lightened crank and pressure fed airbox. I do have some 1200 TB's but I want to see how the fueling goes before I fit them as they are quite a bit larger.

We'll see how it goes.

    

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