BMW K bikes (Bricks)

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1Back to top Go down   Exhaust emission readings  Empty Exhaust emission readings Mon Jul 05, 2021 1:45 pm

Jibe

Jibe
active member
active member
Hi does any one out there know the optimal readings?? I've upgraded my injectors and i am going to get the gasses read at a friend's mot garage. The maf has been adjusted with the lean drop method but its still running rich. I've addressed all the intake leaks (many) and will balance the tb's once the maf has been dialled in. What's the magic number people????

    

2Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Mon Jul 05, 2021 3:09 pm

Laitch

Laitch
Life time member
Life time member
What type of readings are you seeking—dynamometer, emission, rune, I Ching? Smile


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1995 K75 81,000 miles
Exhaust emission readings  Usa-lo10
    

3Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Mon Jul 05, 2021 3:36 pm

Jibe

Jibe
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Er emissions just wanting the C0 without making myself sound silly'er it's a car mot place I'm going and they don't do bikes. Just wondering what figure I'm working to

    

4Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Mon Jul 05, 2021 3:43 pm

MartinW

MartinW
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Life time member
CO value 2 to 2.5 % at idle. What did you do to upgrade the injectors. BMW designed the OEM single hole injectors to spray directly onto the back of the inlet valve to cool the valve and atomise the spray further. 
Regards Martin.
Exhaust emission readings  Cutawa10


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K75s Hybrid
    

5Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Mon Jul 05, 2021 4:02 pm

Jibe

Jibe
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active member
I've fitted Bosch 0 280 158 034 ev14 from tills.de

    

6Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Mon Jul 05, 2021 4:07 pm

MartinW

MartinW
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Are they the 4 hole injector?
Regards Martin.


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K75s Hybrid
    

7Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Mon Jul 05, 2021 4:08 pm

Jibe

Jibe
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active member
Yes they are Martin

    

8Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Mon Jul 05, 2021 4:37 pm

MartinW

MartinW
Life time member
Life time member
I looked at the four hole injectors years ago when they first popped up. I had a talk to a mate of mines son who was an injector specialist. He did a bit of research to check out where the the injector sat and where it sprayed. He came back saying I would be wasting my money as the single hole injector was designed to work with he Bricks combustion setup. He said that I would derive more benefit by cleaning and balancing my OEM injectors. 

I set up my own cleaner test unit running off my compressor hooked to a injector pulsar. On checking the flow and patterns they required cleaning but once cleaned a couple of times the spray and flow equalised. There was a a notable difference to be felt on testing the bike but not provable without a dyno. If I had fitted the 4 hole I also might have felt an improvement due to comparing clean to dirty injectors. Some riders have reported using more fuel with the 4 hole injectors and switched back to 1 hole. I have looked online for a Dyno comparison of 4 hole versus the 1 hole and have yet to find one. Due to the reduced size of the holes the 4 hole ones would be more prone to blockages.

However the feel good benefits from having 4 holes against 1 hole may out weigh the science. I'm waiting for somebody to prove the benefits by posting a dyno comparison between a set of 4 hole ones to a set of reconditioned 1 hole injectors.
Regards Martin.


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K75s Hybrid
    

9Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Tue Jul 06, 2021 3:45 am

Jibe

Jibe
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active member
Thanks for the information it is very much appreciated. I've not binned the old injectors. I will see how these ones go over a period of time and see if any problems arise.

    

10Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Tue Jul 06, 2021 3:47 am

MartinW

MartinW
Life time member
Life time member
Exhaust emission readings  112350


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K75s Hybrid
    

11Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Tue Jul 06, 2021 5:47 am

92KK 84WW Olaf

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I put 4 hole injectors in my 84 RT, the originals being...original,

They upped fuel consumption by 15% and did seemingly improve the running, but only because of being brand new.

After 3,000 miles I put the cleaned up originals back and fuel consumption back to normal.

I didn't put it on a dyno but the riding convinced me the single hole injectors are better!!!


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1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 40,490 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

12Back to top Go down   Exhaust emission readings  Empty Re: Exhaust emission readings Mon Jul 12, 2021 5:19 pm

jbt

jbt
Gold member
Gold member
These 4 holes injectors have a larger debit than OEM ones, so it will increase fuel injection... And emissions (CO and HC). There's no point using them if no other mod is made on the block.
All the bullshit about the better fuel atomization and dispersion is useless on K2V system: injectors spit once per revolution, one time the valve is open, one time it's closed. The engine then sucks what it can when the intake valve opens.
The only advantage is that they're available but OEM Bosh 1 hole injectors are not.
I've tested cheap plastic blue injectors found on eBay, made in Gadgetland. Very satisfied with, they worth the 30€ they cost (for the 4!)


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That fills our fairest day.
    

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