Hi All

I wondered if you might be able to help me out with a fuel trim issue..

I have recently installed a TT system on my Stock LS1 Vette. I upgraded the stock injectors to the Racetronix Delphi 42lb/hr @43.5psi "009" disc style.

After scaling the IFR table to compensate for the higher flow injectors, I notice that the PCM is pulling a great deal of fuel (LTFTs are -ive 10 to -ive 15) to maintain stoich while cruising around.

I have not touched the VE table or MAF ....

I understand that this type of injector is much quicker than the stockers to open and close. Does anyone have experience tuning with these injectors?

For example do people adjust the "injector offset timing" for this type of injector?

I can always scale the IFR table higher than the calculated value until the LTFTs sit at or around zero but I wondered if I might be missing something...

Any help or comments are certainly appreciated.

Dave