I WAS WONDERING IF I WOULD FEEL A DIFFRENCE IN MY CAR'S PERFORMANCE IF I GO FROM 21LB INJECTORS TO 24LB INJECTORS THANKS. 1989 CAMARO IROC-Z 350 TPI

 

It might feel slower. The 24's will be dumping more fuel without chip tuning.

 

oh ok i have 24lb on my other camaro i think they programed the chip for 22 do you think thats why it feels slow when you floor it

 

well if it feels slow then it could be alot of other things besides the fuel injectors.

ohm the injectors, make sure they are all good. replace plugs, cap, rotor, ignition module, wires, check timing, check tps, make sure no vacuum leaks....

ive seen people go from having a 15.5 second 350 TPI car to a 14.2 second car just by changing all the ignition components because they were simply old and not up to par anymore.

 

this camaro that feels slow has everything new accel ign coil, 8mm wires, new ac delco spark plugs, hi performance cap and rotor, no sign of vacuum leaks do tps come specially designed for each car model and year also i have been told that the timing should be at 0 since the original setup was tbi but i have checked for the 305 tpi and it says it needs to be at six so which one should i put the time to six or zero

 

Since a chip has been burned for the car, you should put your timing at whatever the chip has programmed for base timing be it 6 or 0. With that said, the engine should be timed at what it likes best.

SD doesn't agree to changes like injectors as well as MAF. Which do you have?

 

Viprklr so you think if i put 24lb injectors in my original 89 iroc-z maf it will accept the 24lb injectors because i read that as long as the injectors are not over 10-20% bigger

 

Well disregard what you read. As long as they are not over 0% bigger you'll be fine. Otherwise the ecm will be making adjustments (when its allowed to) and may not even be able to adjust far enough.

 

thank you so how do i make my ecm accept my 24lb injectors

 

The code needs to be modified, so basically custom chip. If you dont have the means, it would be easier and cheaper to just get the right size injectors if there is some reason you're replacing them.

 

oh alright thanks so if i get the chip and whats this i have heard of a chip burner how does that work

 

DIY prom board.
Lots of stickies.
In a nutshell, you have a chip, datalogger, programmer, and tuning software.
You datalog
Change what needs to be changed
Program
Try it out.
Start over again.

 

oh alright thanks