BMW K bikes (Bricks)

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1Back to top Go down    WANTED Guinea pig with own dyno on Sat Jul 07, 2018 10:00 pm

MarcS

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https://www.magnumtuning.com/en/detail/evo-tech-motorcycle-performance-chip/bmw/k100-w--early-k-jetronic-inj-

They are claiming significant performance gains on Facebook. I would love to see actual dyno figures.


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K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

2Back to top Go down    Re: WANTED Guinea pig with own dyno on Sat Jul 07, 2018 11:01 pm

RicK G

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They are talking shit they don't even know it's an L Jetronic and they don't have oxygen sensors and they aren't digital so you cant chip them.


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

3Back to top Go down    Re: WANTED Guinea pig with own dyno on Sat Jul 07, 2018 11:52 pm

MarcS

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I thought it might be snake oil. I put a cheap chip on my Nissan Patrol (DI) wagon and it did nothing. I also fitted one to my common rail cab chassis, it then smoked the tyres across an intersection and scared the crap out of me lol.
I did read somewhere that chips make no difference to a K bike.

I have also read that extending duration of the inlet valves and reducing the duration of the exhaust valves will give a few horses, as will advancing the ignition timing a few degrees. These mods are supposed to give better fuel consumption figures too. I have never found a performance mod that gave me better fuel consumption lol. All the extra HP get used Embarassed


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K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

4Back to top Go down    Re: WANTED Guinea pig with own dyno on Sun Jul 08, 2018 12:05 am

RicK G

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I run all my Ks 4° advanced it makes a heap of difference in the bottom end and retarding the inlet cam one tooth should give more in the top end but I have never tried it.
The K100s that were made for the North American market had different cams that made the inlet open 20° later which effectively reduced the compression ratio and the combustion temperatures which produced less oxides of nitrogen.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

5Back to top Go down    Re: WANTED Guinea pig with own dyno on Sun Jul 08, 2018 1:26 am

charlie99

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what i gather they are trying to do ...is interrupt the air temp sensor
and trick the ecu into running richer ….hmm   not snake oil but close to with le-jetronic  

but they claim fuel savings ...hmm    more fuel = more horsies ?


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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
    

6Back to top Go down    Re: WANTED Guinea pig with own dyno on Sun Jul 08, 2018 7:12 am

Dai

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Go for Rick's advance; mark the current position of the HES plate and then advance it so that there's 6mm between the inner and outer marks. It has a tendancy to make a standard engine feel like a bit of a slug off the line. Retarding the inlet is too much like hard work for me Smile


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

7Back to top Go down    Re: WANTED Guinea pig with own dyno on Sun Jul 08, 2018 9:17 am

robmack

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And the direction of advance is counter-clockwise as viewed from the front of the engine, Dai??


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Robert
1987 K75 @k75retro.blogspot.ca
2011 Moto Guzzi V7 Racer
http://k75retro.blogspot.ca/
    

8Back to top Go down    Re: WANTED Guinea pig with own dyno on Sun Jul 08, 2018 10:23 am

RicK G

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The engine turns counter clockwise looking at the front so the plate has to go 3mm clockwise to advance it 4°
This is the plate in the normal position.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

9Back to top Go down    Re: WANTED Guinea pig with own dyno on Sun Jul 08, 2018 3:16 pm

Dai

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Sh!t - typo. Sorry guys and thanks Rick.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

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