wheelsup

What would some of the possible driveability symtoms be under WOT.
Thanks in advance. I strictly drag race my 91 Vette.
Phil C


[Modified by wheelsup, 4:00 PM 11/6/2002]

LT401Vette

If the ECM is calibrated correctly there would be none.

wheelsup

LT401Vette, assuming no prom changes,If I swap in 24lbs injectors for the 22lb,would this lower the Duty cycle?? Looking at Diacom data it appears that they are on the edge. Would this be more of a factor under heavy load (1st gear) ?
Thanks
Phil C

LT401Vette

Nope, the pulse width and duty cycle would remain the same and the car would run richer, unless you lower fuel pressure. Then you are right back where you started. A change in injector size will require a new chip to get any benefit, unless your problem was that you had to run your fuel pressure too high :)

wheelsup

The high fuel pressure (53-56 psi) is where I think the problem lies.
Phil C

LT401Vette

53-56 psi shouldn't be a problem. If it is causing a problem like rich idle, going to 24lb injectors will bring the pressure down, but the car will run the same at that new lowered pressure. I don't generally wory about pressure until you are over 60psi.