Next Question! Fuel Injectors - Crazy CO values

[2 Wheel Wanderer]

OK so continuing on from my last thread ( http://ducatimonsterforum.org/index.php?topic=38834.0 ) I was able to sync my bike but still getting slight vibration in the foot pegs. All throughout my ordeals in the last 6 months I have been getting crazy readings from my CO analyzer, 3% difference between headers. I'd get 3% on the vertical head and 6% on the horizontal. I have consistently thought it was due to an air leak.

Just for shits and giggles I decided to perform another test, switch the injectors. What happens? The values switch, 6% on the vertical head and 3% on the horizontal.

I know now it is impossible for me to sync air flows and CO measurements. For now the bike performs best if I sync the airflow's to higher RPM's. I looked at the price for new OEM injectors $619 each. WOW!! I guess I'll have to find a place to get em cleaned.

One more thing, I did a compression test just to be sure there wasn't a leak and both cylinders were at 150 psi.

Is the continuing vibration due to a CO that cant be matched due to the injectors? Is this hurting my engine?  When I get em cleaned how much of a difference will it make when I can finally sync air flows and CO?

[devimau]

send them to rc engeniering in souther california, they'll charge you $35 to clean and calibrate them.
after that put them back on and with the air bleeders all closed sync t/b.
after that adjust co for both cyl, if bike is stock don't go above 3%, also record hc readings, if you have more than 800 you should be worried.

[Howie]

Or you could try running Shell Techron, an excellent fuel injection cleaner.  Do not use more than the instructions tell you.

[2 Wheel Wanderer]

devimau, that's a good price but I got a guy @ Factory Pro Tuning who is not 10 mins from me who'll clean and calibrate em for me for another $20. The bike has Termis, open airbox and a DP chip. I have the VDST so I am able to change the trimmer if need be. About the HC reading, I only have a Gunston gastester so It wont record those readings but its is a great point, I'll just bring it over to Factory Pro Tuning for them to check on their gas tester.

Howie, good idea man, I'll try that 1st and see how it goes.

[seevtsaab]

I think the Techron you want is made by Chevron, I've bought it as
Techron II Concentrate (i think the label has changed somewhat).
It's good stuff.

[Howie]

I think the Techron you want is made by Chevron, I've bought it as
Techron II Concentrate (i think the label has changed somewhat).
It's good stuff.

Doh!(smacking self upside head) it is indeed Chevron.

[brad black]

3% to 6% is nothing unusual.  just wind one air bleed out 1/2 turn, the other in 1/2 turn and they'll probably be spot on.  4.5 - 5% on each cylinder will be good.

[2 Wheel Wanderer]

Thanks for the answer Brad, this is a valuable one. Ill give er a go and report back to the masses.

3% to 6% is nothing unusual.  just wind one air bleed out 1/2 turn, the other in 1/2 turn and they'll probably be spot on.  4.5 - 5% on each cylinder will be good.

[devimau]

3% to 6% is nothing unusual.  just wind one air bleed out 1/2 turn, the other in 1/2 turn and they'll probably be spot on.  4.5 - 5% on each cylinder will be good.

that in australia might be ok but here in california with the crappy fuel we have that level of co% will make the bike run lazy, develop lots of carbon deposits and probably wash the cyl leading to cyl scoring after a couple of years.

[He Man]

you mean the detergents in the fuel? Theres more strict guidlines in the fuel for Cali than there is for other parts of the united states isnt there?

[ducpainter]

that in australia might be ok but here in california with the crappy fuel we have that level of co% will make the bike run lazy, develop lots of carbon deposits and probably wash the cyl leading to cyl scoring after a couple of years.

I'm familiar with Brads credentials.

What are yours if you don't mind me asking?

[devimau]

10 years of ducati certified, 2 years of bologna factory certified, worked for ducati dealers for the past 10 years, desmocedicci certified, racing ducatis for the past 3 years, I just opened my own shop, if you need more ask you friend Mr meyers about mauro deviasso, he knows me very well.
what about you?

[ducpainter]

10 years of ducati certified, 2 years of bologna factory certified, worked for ducati dealers for the past 10 years, desmocedicci certified, racing ducatis for the past 3 years, I just opened my own shop, if you need more ask you friend Mr meyers about mauro deviasso, he knows me very well.
what about you?

I just hang around and observe and learn.

I wasn't disparaging you. I simply asked a question.

...and for the record I believe the fuel we get in the states is absolute garbage and causes lots of problems.

Explain this though. Why would that % of co wash walls on ethanol fuel but not good fuel?

[devimau]

the richer you run the more you'll wash the oiled cyl walls and the more you'll score them, it doesn't matter what gas you use.
I'm just saying that I came across several ducs with scoring problems due to a rich fuel mixture, also with so much carbon on the valve seats that it'd have no compression due to a valve seat leak, I'm not discrediting anybody, this is  my own belive only and nothing else and since this is an open forum I feel like I want to share my experience with some people who might appreciate it.
while setting up my 1098 for racing I installed a nemesis ecu and a lambda reader with the self tuning option, then we ran it @ the dyno for several tries playing with the fuel options, long story short on 91 octane the bike made the best power when co levels were between 2.5 to 3 %.
Also every decent tuner knows that the leaner the mixture (without making it so lean that the engine will bogg out or detonate or create another problems) the sharper and quicker the throttle response is.
In 2 stroke engine tuning that's even more pronunciated, I remember racing 125's go karts (parilla engines) and closing the top end jet (yes, they are adjustables) a bit to pass guys on the straights and then open it back up in the infield so the engine won't seize, then this same guys with built engines didn't understand how a stock engine will blow by them on the straights.
probably the 91 oct fuel with ethanol will leave way more residue than a different fuel and also is very dry, even more than a normal fuel, If you uncreat any ducs nowadays they come with a bit of 98 fuel from Italy leftover, when you touch that fuel it'll leave a grease residue in your hand while the one from our pumps will dry up on your hand and leave a white residue on it, crazy stuff shh?

[ducpainter]

As you know Bruce is a huge advocate of low octane fuel in stock compression engines.

Is it possible that the engines you saw with the scoring and carbon were using premium fuel?