IDC is just a formula, so over 100% and your injectors ARE maxed. You can make it command 105% or 200% and it still delivers the same amount of fuel.

 

Thats tru.. but in reality it only added 3* so its better, but not that much extra power haha




yea my pump is several years old and make some loud noises.. my backlight in my guage is dead and it was night time so i couldnt see my pressure.


I hooked my meth up and was tuning for it. AFR was rich so i did auto ve and pulled quite a bit of fuel out and added some timing. then noticed it was running lean in the upper rpms and IDC was high.


True.
Trying to get the tahoe fixed up so i can drive it while i save up and get the injectors and everything else for the truck....

 

At 5644 RPM, one complete engine cycle (2 revolutions) takes ~21.26 milliseconds....you are commanding 25ms injector pulse time...25/21.26 = ~1.1758.

 

So the 1.17 is the engine cycle??

 

Basically 1.0 means the injector is firing during the whole revolution, so 1.17 means that it's commanding 17% more then full on.

 

AH! thats where it comes up with 117%... ok im on the same page now.

Maybe i just need to run a bigger nozzle on the other side.. right now im runnin a 10 and a 5 i think.

 

X2. It's physically impossible to get 25ms worth of fuel in 21.26ms. 21.26m is the time it takes for the engine to go 2 revolutions (4 stroke engine) at 5644 rpms.

 

I see..
Ill change the ramp rate of the methanol to hold me off.

 

Adding timing will make it leaner, although for what you added in my expirence not near that much.

 

I set it to shift early, so i can still mash on the gas for now.

looks like i can add two fuel pumps to my to do list before i get injectors also. No point in chancing it.