Gains from 3.5" pulley and supporting mods?

[NinetyEightGTP]

I had plans on doing up my GP with a 3.5" pulley and supporting mods this christmas (downpipe, intake, plugs, tstat, etc.)

Also grabbing a scangauge to monitor KR.

What kind of gains will I be looking at here?

[Elite6]

Look to gain KR, skip the DP & get some SD Headers, then look for some nice gains. I have all the supporting mods + a little bit more & will be going custom tune & 3.4 in the spring.

[buickman104]

My guess is about 20 extra HP at the Crank.

[NinetyEightGTP]

Look to gain KR, skip the DP & get some SD Headers, then look for some nice gains. I have all the supporting mods + a little bit more & will be going custom tune & 3.4 in the spring.

Will grab the SD headers instead. I'm looking for actual numbers, though.

[Oxfire]

~250WHP. I really hope you have a tune lined up as well.

[NinetyEightGTP]

~250WHP. I really hope you have a tune lined up as well.

Not right away, but soon.

[Oxfire]

I hope as soon as in when you put the mods in and tune the car pretty soon after.

[NinetyEightGTP]

I hope as soon as in when you put the mods in and tune the car pretty soon after.

Something like that, yeah.

[Fivefingerdeathpunch]

You might gain 20-30 whp and maybe 30-35 ft lbs torque.

[matt5112]

I hope as soon as in when you put the mods in and tune the car pretty soon after.

Why?

[Slick2500]

3.5 pulley is pointless it requires pretty much the same mods as a 3.4 pulley. I say since your doing headers and a tune try for the 3.4 pulley.

[TexasTanker19kilo20]

^^^ I agree I am two mods from the 3.4 setup. That's all I plan on doing. All I need is headers and pulley.

[NinetyEightGTP]

3.5 pulley is pointless it requires pretty much the same mods as a 3.4 pulley. I say since your doing headers and a tune try for the 3.4 pulley.

I'm buying a modular pulley setup, but I guess this means I can grab one with a 3.4" pulley instead.

Good news, and a little more power, I guess.

Thanks for the advice.

[blakgtp]

if you are getting a custom tune i suggest going with a 3.6 or 3.5 pulley and adding more timing. depends on your altitude and car though. on my car. i was seeing lot's of kr with the headers, supporting mods and 3.4 pulley. (i'm 2 feet below sea level)

[txslow6]

Vendors love this site.

[NinetyEightGTP]

if you are getting a custom tune i suggest going with a 3.6 or 3.5 pulley and adding more timing. depends on your altitude and car though. on my car. i was seeing lot's of kr with the headers, supporting mods and 3.4 pulley. (i'm 2 feet below sea level)

Well, I'm buying a modular pulley setup. If I have tons of KR, I'll up the pulley size.

[Tuner-Extraordinaire]

3.4 requires more than most people think.

Why? because seasons.

3.6 and timing will make a car that's just as fast, and less prone to knock.

[NinetyEightGTP]

3.4 requires more than most people think.

Why? because seasons.

3.6 and timing will make a car that's just as fast, and less prone to knock.

I suppose I can go with a 3.6" and slowly move down pulley sizes if I don't scan any KR.

[Tuner-Extraordinaire]

Possibly.

Only if you are able to run at least 18* on the 3.6

[blakgtp]

most ppl who run a 3.4 with just headers are running like 15*. if you go with the 3.5 or 3.6, you can add timing, but if you get the 3.4 and at 15* you still have KR, then what?
you will have to buy another pulley.