Gains from new mods

[ledfo0t31]

I finally was able to start adding some parts onto my 02 GTP. I was able to put on a cai, ZZP throttle body spacer, ZZP 3.5 pulley, & ZZP Downpipe with cat. Looking to get a tuned PCM very soon along with some other items as i go. What kind of gains can i expect from what i have put on here thus far? Was just hoping some ball park numbers if anyone can help me on that? Thanks guys

[WarStryker13]

Take the spacer off, it does nothing but cause more problems.

You should seriously read this thread. Multiple times.

http://www.grandprixforums.net/threa...00-Powered-Car!!


And learn to use the search box.

[chrsmi1]

20whp maybe depending on knock. Headers would help.

[Fivefingerdeathpunch]

Agreed, maybe 20 hp. So like 220 to the tire.

[Fastcp]

I think I am in same area, with mods being 3" cdp, 180 tstat, SR Intake, 41-104 plugs, gapped at 40, 5.3 beehive springs-retainers-keepers, 1.9 modified rockers, front plog, 3.35 pulley, racetronix fuel pump rewire, 3 wire upgrade, egr unplugged, overkill tune, 2.0 60'. I am thinking 220 to the wheels.

[Fivefingerdeathpunch]

A 3.3 pulley with a downpipe/plog combo and a tune should be more than 20hp. Nothing ground breaking but I'd say atleast another 10-15hp because you are running a little more boost.

[Fastcp]

So your thinking 235 to the wheels, Scan shows injector duty cycle hitting 96% at 1k' speed and injectors go down hill. Think larger injectors are in order.

[Fastcp]

Its a 2000 GTP 4 door car I call POS, grandsons car seat in back.

[Fivefingerdeathpunch]

It could be a stupid rich too though, if it's running 10's for AFR thats going to make the injector duty cycle alot higher than if you were running mid 11's for AFR.

Still figure that 90% duty cycle is about the upper limit of you want to run. You'll need a wideband to see real time air fuel ratio.

[Fastcp]

I have a HP Tuners 3.0 all new to me what should I look for on the data scan I did at the track. Thanks in advance working 2 jobs so posts might be days apart.