3.6" Pulley

**TheAce144** · 02-14-2011

Hey guys, I have a 04 Grand Prix GTP with the following mods :

1)ZZP 180* Thermostat
2)NGK Spark Plugs and Wires
3)Cold Air Intake
4)Overkill PCM
5)Resonator delete and muffler delete

I wanted to know if I could drop a pulley size and go with a 3,6" pulley...Or would it be better with some more supporting mods like headers or 1.9 rockers...

I know that if I install headers I will lose low end torque...will the pulley swap bring it back to normal?

My car is a daily driver, looking for some more torque while keeping an eye on budget.

Thanks for your time!

**machinegunsquid** · 02-14-2011

only real mod you have is the Intake.

Get a set of headers, and some Copper plugs, and then drop to a 3.6"

Just browse through this, it'll tell you everything you need to know
http://www.grandprixforums.net/safel...car-17482.html

Just remember the Gen V doesn't need as small a pulley as the gen 3.

**OH4CompG** · 02-14-2011

I had headers, intake, and a tune when I dropped to a 3.6 and I still had a few degrees of kr

**machinegunsquid** · 02-14-2011

Yeah, you're better off saving the engine, and getting more flow mods first, then dropping pulley sizes...that's just common sense.

**footballplaya3k** · 02-15-2011

Originally Posted by OH4CompG

I had headers, intake, and a tune when I dropped to a 3.6 and I still had a few degrees of kr

Same here. I had to drop timing in some spots to 15* to kill it all.

**nascartech** · 02-15-2011

get some headers and a good tune and 104s then 3.6 and have it scanned

**blueguy** · 02-16-2011

Leave the stock pulley and throw 20* of timing at it after you get headers.

It'll be faster than the 3.6" cars with stock timing most likely.

**darkhorizon** · 02-16-2011

My car is really fast with the stock pulley IMO...

Headers are not going to "make you lose low end torque". Blowers eliminate the need for advanced scavenging or whatever you get from a crappy log manifold system.

**blueguy** · 02-16-2011

People think they lose low end from installing headers, its just moving the powerband higher guys.

**TheAce144** · 02-16-2011

Found this image, GTO with and without headers, interesting indeed

**TheAce144** · 02-16-2011

I see the powerband is moving, but how does it affect driveability, torque wise (throttle response, ect)...?

**blueguy** · 02-17-2011

It's more linear...and your not getting that crazy torquey feeling with headers and a stock pulley...but you get that back when you crank up the timing or pulley down for more boost. Also...its about flow...these cars tend to run great around 10-12psi.

**TheAce144** · 02-17-2011

Just checked their site today and the SSAC headers are now 175$, massive price drop!!! Are they any good, because most people seem to go with the Speed Daddy headers.

**matt5112** · 02-17-2011

They're the same.

SSAC just recently updated their price.

**PurpleGuy** · 02-17-2011

dont the ssac tend ot have better reviews though?

**Silver GTP** · 02-17-2011

SSAC and Speed Daddy headers are the same thing. Not similar products with a similar design, but the same product. I have seen both of them. They are both supplied by the same place and sold by two different companies.