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Old 05-10-2007, 06:48 AM   #1
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Default 3.2 pulley

What mods would i need to drop down to a 3.2 pulley?
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Old 05-10-2007, 09:03 AM   #2
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Each car is a little different on how much KR you'll get doing that. As a starter.. you should aim for swapping out the exhaust manifolds with either PEM'* or and I'd suggest headers and a high flow cat.

From there.. it looks like you have an intake. Maybe a ported supercharger to help flow. And rockers or a cam would also be recommended.
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Old 05-10-2007, 10:48 AM   #3
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By your sig you have the cai and high flow cat so next would be headers and high ratio rockers or cam as boosty pointed out.
Intercooler would allow you drop in pulley size as well, but you need to get that air out first before you stuff more in.
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Old 05-10-2007, 12:50 PM   #4
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Old 05-10-2007, 02:59 PM   #5
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At the very least headers and 1.9 rockers with good fuel (93+) and a good tune. I would prefer to see a cam in the car instead of the rockers
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Old 05-10-2007, 10:54 PM   #6
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Quote:
Originally Posted by Rogue
At the very least headers and 1.9 rockers with good fuel (93+) and a good tune. I would prefer to see a cam in the car instead of the rockers
I concur.
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Old 05-11-2007, 01:25 PM   #7
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For a 3.2, you can use race gas and then you don't need mods
Or you would need one of the following setups:
cam
rockers, headers, catback, Tstat, PCM
intercooler
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Old 05-11-2007, 02:07 PM   #8
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While an intercooler is an option I don't like it as a first or second mod for the following reasons.

1) The point is not to run a 3.2 pulley, the point is to make power. While an intercooler may allow you to runa 3.2 pulley all you are doing is cramming in more air and whle that may make 20 or so more horsepower over a 3.4 your spending close to a grand to do it. If the pump fails or you get a leak you risk running more boost than a motor can take.

2) A cam on the other hand can make up to 50 more peak horsepower as well as allow you to run a smaller pulley (more power) because your moving more air through the motor. Boost is a measure of manifold pressure, moving air through the motor is what makes horsepower. The cam will never fail to work due to a pump failure or loosing fluid so the danger of running more boost than you can take is nil. Cost is comparable to an intercooler setup.
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Old 05-11-2007, 04:19 PM   #9
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I had 1.9'*, headers, 105 octane, etc etc. and still had some ugly KR at the track sometimes at the track with a 3.2.

Get a cam and I'm sure you're in the clear!
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Old 05-11-2007, 10:39 PM   #10
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I ran a 3.1" at the track with race fuel, headers, 1.9 rockers and CAI with no KR.

Ran a 2.9" with water injection and same setup for my PB of 13.5 sec.
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