Thread: Pulley setup.

Ok so I know its probably been asked before......buuut......
I am new to GTPs. What is the advantages to running a 3.4 or 3.2 pulley over stock? I see its a common mod.
I am not very familiar with superchargers.

I also see "running a 3.4 and supporting mods." What exactly are the supporting mods?

Long story short.

Motor doesn't flow well.

Has a high RPM cylinder filling deficiency.

You need to increase flow.

Then you can spin the blower faster.

Motor = air pump.

More air in, more air out, more power.

Good times.

If you're stock. There's NO advantage running a smaller pulley.

In fact your stock pulley car probably already knocks on the order of 4-6* of timing reduction at wide open throttle.

Smaller pulleys spin the blower faster, making more boost. More boost without flow mods = more timing reduction and possibly chipping a piston.


Matt put it as plainly as it had to be put. Our motors already don't flow enough for a stock pulley.

blower spinning faster does not mean more boost.

It means its blowing more air into the manifold.

the motor not being able to keep up results in a pressure buildup in the intake manifold that we call "boost".

Originally Posted by matt5112

blower spinning faster does not mean more boost.

It means its blowing more air into the manifold.

the motor not being able to keep up results in a pressure buildup in the intake manifold that we call "boost".

Simple terms.

Ok, I am only planning on a CAI, and exhaust for mods at this point. I just dont know if I should bother with a smaller pulley or not.

Nope.

No pulley.

Thank you very much for the info. Much appreciated

Not a problem.

Originally Posted by 00SilverGTP

Ok, I am only planning on a CAI, and exhaust for mods at this point. I just dont know if I should bother with a smaller pulley or not.

Dont bother modding the catback unless you're either going to remove the ubend or getting headers.

Originally Posted by Nixon

Dont bother modding the catback unless you're either going to remove the ubend or getting headers.

A friend of mine owns a muffler shop. He is builing me a full custom exhaust setup.

Originally Posted by bluegtp91

Link in signature...read some.

Bro.

Thank you!

Awesome.

Word of advice: Transverse 3800's sound poopy all the time.

So have a resonator/glass pack in the stock location and two turbo mufflers. Nothing louder or you'll most probably regret it.

Originally Posted by matt5112

Awesome.

Word of advice: Transverse 3800's sound poopy all the time.

So have a resonator/glass pack in the stock location and two turbo mufflers. Nothing louder or you'll most probably regret it.

He is doing headers, cat and magnaflows. I dont want it much louder than stock, just more free flowing and a little more aggressive sounding. I have noticed a few 3800s around that have that almost chugg mixed with fart sound I am prepared for to have a bit of that. But I definitely dont want to wake the neighbors when I fire the car up at 5am to go to work

If a resonator is needed still we will add one

Originally Posted by fubar569

SD headers with no cat, no res, and gutted mufflers sound like some pissed off hamsters and a 5b bag of rocks in a blender.

FYI. lol

Hahaha