Another Pulley ? Thread

[ASCStinger]

I'm going to be running a Gev V swap on my 98 gtp, and it's coming with a 3.25 pulley on a zzp MPS, I know I'll need to get something larger, but not sure how much (considering the V vs III, and the mod list)

-Stock Gen V Blower
-Northstar TB
-LQ4 MAF
-Ported LIM (upper only, running stock heads)
-Ported front exhaust manifold
-2.5" uncatted downpipe
-CAI of sorts (haven't decided on a specific one as of yet, but will be present when I do the blower swap)
-NGK TR6x Plugs on AC Delco wires
-Pre-Tuned PCM

Any input as to what I could run safely and reliably for a daily driver would be appreciated. Also, what are thoughts on running a gutted 99- airbox instead of a CAI, as a cost-saving measure?

[FoSHO99]

Probably get away with a 3.5 pulley. You should get a bigger downpipe or go with headers though.

For the intake, either get a CAI or just stick a filter right off of the LQ4 maf. Its restriction vs. air temps. and when you have a supercharger the temp. is going to rise either way, so don't lose sleep over going one way or the other. Gutting the stock airbox probably wouldn't be the ideal solution.

[Bio248]

more exhaust.

[blueguy]

X2 ^^ I'd prolly run a 3.8" or 3.6" to be on the safe side...you'll be pushing a lot of air with a tiny DP and no cat...I'd get some headers and you might be safe on a 3.4"...with a tune of course...

[2003 SSEi]

i would not run the Gutted airbox a CAI or FWI for sure

and your gonna need a 3.5 or larger pulley for the Gen V

[Scimmia]

lol, a tiny DP? A 2.5" mandrel bent DP without u-bend or cat is still WAY better than stock.

[blueguy]

lol, a tiny DP? A 2.5" mandrel bent DP without u-bend or cat is still WAY better than stock.

It ain't great either.

[ASCStinger]

A new exhaust is in the future, I just dont have the funds for both a new blower and a new exhaust setup.

@FoSho99, I may just run the open cone for now and try to learn more about making my own CAI instead of dropping 200+ on a prefab, thanks for the advice

So a 3.6 it is for now, once I have a better exhuast and find someone who will dyno-tune it should be safe to drop down to a 3.5-3.4?

[blueguy]

A new exhaust is in the future, I just dont have the funds for both a new blower and a new exhaust setup.

@FoSho99, I may just run the open cone for now and try to learn more about making my own CAI instead of dropping 200+ on a prefab, thanks for the advice

So a 3.6 it is for now, once I have a better exhuast and find someone who will dyno-tune it should be safe to drop down to a 3.5-3.4?

Once you get the funds to open up the exhaust yes...honestly I would get the exhaust mods done...and take the pulley (3.4") to the dyno with you...dyno it with the 3.6 & the 3.4 and see if you have any KR with the 3.4...and if you don't then I'd tune it for the 3.4"

[ASCStinger]

aight, thanks for the help

[Sabrewings]

QwikGT put down almost 300WHP on a 2.5" DP. They flow pretty well.