My first upgrade

[behvah78]

CYA seems to have a good price for what they have. Have you tried it? is it hard to install??

[Ripn12s]

I have both PCM's and have been very happy w/ both.

Cya is the newer pcm and is not as widely used or proven as the DHP.

Install takes maybe 15minutes

[behvah78]

Is there a programer for GPGT?? Would the dealership reprogram my ECU if I tell them that I don't want to warranty??

[DVS LT1]

Originally Posted by kilroypr

I have heard that if you do not have that much air flowing out of the combustion chamber(a.k.a. your engine producing a heck of exausht pressure) the engine will deflate too quickly even on intake and instead of making more power you might loose some.

If there's not enough back-preasure the end result can be a loss in low-end torque. This may or may not be offset by a relatively equal increase in horsepower throughout the higher RPM range. Thats why some people with stock setups in their V8 trucks or even Camaro's feel they lose a bit off the line after switching to a 4" or even 3" exhaust.

This seems to be the engineering behind the 80 series Flowmaster - aparently it has been proven to provide the most HP gains to stock or lightly modified F-Bodies. Both the 2.5" & 3" inlet models have dual 2.5" outlets. Sounds like peanuts compared to the stock 2.5" (I think) inlet to dual 2.25" outlet but there's actually some decent HP gains to be had.

[Ripn12s]

Both DHP and CYA have PCM versions for the GP GT's