[Z06] Underdrive Pulley Advice?
Thread Starter
Pro
Joined: Apr 2007
Posts: 538
Likes: 2
From: Beaverton OR
Underdrive Pulley Advice?
Just wondering what affects have been noticed by adding aftermarket underdrive pulleys to a Z06. Ayone have any feelings? I don't plan on many mods, hurricane intake, eventually LG Pro LT headers and high flow cats. Are pulleys good to do with a tune or is the money better spent elsewhere? Also am curious about adverse affects (AC won't work well at idle, drains battery, etc.)? Thanks!
Last edited by LarryDallas; May 10, 2007 at 02:14 PM. Reason: spelling
Racer
Joined: Dec 2006
Posts: 4,434
Likes: 18
From: Braselton GA
It's one of those "if you are already in there" jobs, do it. But don't tear the rack and front of the motor out JUST to do the pulley.
I put an SLP on my 01 (while in there fixing an oil leak). AC side of the pulley is same as stock, so no compressor reduction speed there. I get full volt at idle (stock rpm idle) and no cooling issues.
Whatever pulley you get, get one with a 3/16 keyway and pin it on the crank while you are in there.
I put an SLP on my 01 (while in there fixing an oil leak). AC side of the pulley is same as stock, so no compressor reduction speed there. I get full volt at idle (stock rpm idle) and no cooling issues.
Whatever pulley you get, get one with a 3/16 keyway and pin it on the crank while you are in there.
Thread Starter
Pro
Joined: Apr 2007
Posts: 538
Likes: 2
From: Beaverton OR
It's one of those "if you are already in there" jobs, do it. But don't tear the rack and front of the motor out JUST to do the pulley.
I put an SLP on my 01 (while in there fixing an oil leak). AC side of the pulley is same as stock, so no compressor reduction speed there. I get full volt at idle (stock rpm idle) and no cooling issues.
Whatever pulley you get, get one with a 3/16 keyway and pin it on the crank while you are in there.
I put an SLP on my 01 (while in there fixing an oil leak). AC side of the pulley is same as stock, so no compressor reduction speed there. I get full volt at idle (stock rpm idle) and no cooling issues.
Whatever pulley you get, get one with a 3/16 keyway and pin it on the crank while you are in there.
Pro
Joined: Jan 2003
Posts: 637
Likes: 0
From: Laurel MD
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17
I had an ASP underdrive pulley recently installed when I had my head and cam install done. I have definitely noticed a difference in that if I try to start my car with the AC on, it will die. Even when I've been driving for awhile and then come to a stop sign (with AC on) the RPMs will drop really low like it's going to die, but then kick back up at the last minute. I still have the stock battery so that might be part of the issue, I plan on getting it replaced next week.
Racer
Joined: May 2004
Posts: 283
Likes: 0
From: Sugar Land TX
St. Jude Donor '08
Racer
Joined: Apr 2006
Posts: 389
Likes: 0
From: Killeen Texas
I had an ASP underdrive pulley recently installed when I had my head and cam install done. I have definitely noticed a difference in that if I try to start my car with the AC on, it will die. Even when I've been driving for awhile and then come to a stop sign (with AC on) the RPMs will drop really low like it's going to die, but then kick back up at the last minute. I still have the stock battery so that might be part of the issue, I plan on getting it replaced next week.
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