thats on a 7.. and the boost is 20 psi.. pretty much what you guys run??

I set the correction factor for 680cc (using 750cc though).. before this I had the correction factor set at 750cc.. timing was still up to 23 degrees but at 25-26 psi boost.. some guys are running these too but I've never seen so high a timing before

I'm using the black box.. so I only log knock voltage..check out spare 0 voltage readings.. thats my knock..

 

I am using 720cc injectors but not using the injector compensation, it's still set at 560cc. Either way the ECU+ is doing the same thing, tricking the ECU into seeing less airflow.

I run 21psi. My car wants to run about 23-24 degress up top because of my larger injectors, that is why I am taking 4 degrees out up top. It would knock like crazy if I didn't.

 

Razor,

Do you also think that the same thing is happening during spoolup. The reason that I ask is that my timing almost bottoms out at 0 degrees at torque peak at 18-19 psig boost. I noticed your fueling map is subtracting 10-14% in this range. Is this why you are seeing the timing not bottom out like I am. Your starts increasing at 6 degrees. Mine goes all the way to 1 degree. I am running the stock injectors

I guess that I should be able to get the same effect by adding timing(without adding injectors), but I wanted to get your thoughts.

HiVoltEVO8

 

Anytime the ECU+ is telling the EVO ECU a lower MAF HZ value then is actually happening, it will move into a lower load map and increase timing, that is the whole essence of what piggybacks do.

Do you have negative fueling set in that area?

I've seen as low as 3 degrees in the peak torque area before. Without adding any timing, I usually get about 5 degrees. That's why I started messing around with adding timing, I noticed alot of people with straight ECU reflashes run more timing and I believe even the stock ECU runs a couple more degrees of timing there.

 

yub.. I know what happens

thats why I went lower compensation..

but 29 degrees.. dyam thats alot
no knock.. still wondering if its possible..

hmm got another thought to this.. maybe it is the engine

 

I have not hooked up my wideband yet. Therefore, I only have subtracted 3-4% fuel in that area. Once I get the wideband hooked up, I can log the AFR and may be able to subtract more fuel and get better timing. From the information that you have given, it seems that 680 cc injectors may be the best for the motor.

HiVoltEVO8

 

Are you running lower compression than evo 8's?

 

standard compression 8)

as long as theres no knock, its making power .. I'm fine with it