underdrive pulley question
Thread Starter
Racer
Joined: May 2009
Posts: 251
Likes: 1
From: New Bern NC
underdrive pulley question
my stock crank pulley has a wobble and im thinking of replacing it with an underdrive unit.
What is the best bang for the buck? since there are so many out there!
and do any come in a kit with the new belts?
the car is mostly a weekend car in stock form so I was thinking only 10% but im ready for any suggestions
thanks
What is the best bang for the buck? since there are so many out there!
and do any come in a kit with the new belts?
the car is mostly a weekend car in stock form so I was thinking only 10% but im ready for any suggestions
thanks
Safety Car
Joined: Oct 2007
Posts: 3,903
Likes: 1
From: You know your drunk when you swerve to miss the tree then you realize its your air freshener! Covington Ga
I would use an ATI or powerband. If you look in this section(Tech) or use the search, the same question was asked. There's some pretty good info in there. I dont think they come with the belt. I could be wrong. Good luck with the search.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
You also get a very nice damper that wont fall apart and damage your engine. I used the power bond and it proven very reliable.
Le Mans Master
Joined: Jun 2006
Posts: 6,478
Likes: 20
From: guthrie oklahoma
The accessory drive pulley is smaller so it turns all the accessories slower and removes a small amount of load from the crankshaft. You gain a few HP. You also get a very nice damper that wont fall apart and damage your engine.
I used the power bond and it proven very reliable.
You also get a very nice damper that wont fall apart and damage your engine. I used the power bond and it proven very reliable.
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Le Mans Master
Joined: Jun 2006
Posts: 6,478
Likes: 20
From: guthrie oklahoma
K060775
K040400
Apparently according to the vendor I used the AC is underdriven 10%
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
I'd like to hear your opinion of how it changed the performance of the car. I'm mainly looking for throttle response. It feels like it's lagging a little betwen idle-2500rpm.
Safety Car
Joined: Mar 2005
Posts: 3,639
Likes: 8
From: Madison Wisconsin
St. Jude Donor '08
Just don't get one if you have future plans for supercharging because it would throw off the crank/blower boost ratio I think. Maybe they make blower pulleys that go with underdrive crank pulleys?
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
DUDE, A suggestion here..........If you EVER plan on modding your car, go ahead and put a cam in it RIGHT NOW 
You will have done the two hardest jobs (IMO) to installing a cam, pulling the steering rack and the balancer!!
Seriously, if you even THINK you might want a cam eventually, you will be RIGHT THERE AT IT
My .02
You will have done the two hardest jobs (IMO) to installing a cam, pulling the steering rack and the balancer!!
Seriously, if you even THINK you might want a cam eventually, you will be RIGHT THERE AT IT
My .02
Safety Car
Joined: Jul 2005
Posts: 3,572
Likes: 9
From: Jackson Tn
St. Jude Donor '06-'07-'08-'09
DUDE, A suggestion here..........If you EVER plan on modding your car, go ahead and put a cam in it RIGHT NOW
You will have done the two hardest jobs (IMO) to installing a cam, pulling the steering rack and the balancer!!
Seriously, if you even THINK you might want a cam eventually, you will be RIGHT THERE AT IT
My .02
You will have done the two hardest jobs (IMO) to installing a cam, pulling the steering rack and the balancer!!
Seriously, if you even THINK you might want a cam eventually, you will be RIGHT THERE AT IT
My .02
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
DUDE, A suggestion here..........If you EVER plan on modding your car, go ahead and put a cam in it RIGHT NOW
You will have done the two hardest jobs (IMO) to installing a cam, pulling the steering rack and the balancer!!
Seriously, if you even THINK you might want a cam eventually, you will be RIGHT THERE AT IT
My .02
You will have done the two hardest jobs (IMO) to installing a cam, pulling the steering rack and the balancer!!
Seriously, if you even THINK you might want a cam eventually, you will be RIGHT THERE AT IT
My .02
Le Mans Master
Joined: Dec 2005
Posts: 8,535
Likes: 921
From: Communist Colorado
No FI on this car. As much as i want to, i just can't justify that kind of $$ on a 97. If i get a C6 this year (as planned) all bets are off.
I'm giving thought to an 02+ LS6 cam to keep a stealthy idle but givee significanly better low end torque. While i'm at it, i'll upgrade the pushrods and valvesprings. Figure it will be good for about 30 hp on the bottom end. (not to concerned about up top gains)
I'm giving thought to an 02+ LS6 cam to keep a stealthy idle but givee significanly better low end torque. While i'm at it, i'll upgrade the pushrods and valvesprings. Figure it will be good for about 30 hp on the bottom end. (not to concerned about up top gains)
Le Mans Master
Joined: Jun 2006
Posts: 6,478
Likes: 20
From: guthrie oklahoma
I bought mine from Texas Speed also they were great to work with as this was a last minute need it now decision, something made my car start running funny I dont know if it was the pullety or what
http://www.youtube.com/watch?v=TsfU4...eature=channel
Last edited by jon c; May 14, 2010 at 09:19 PM.
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
It is hard to say because I put in a cam and some other goodies at the same time.
I bought mine from Texas Speed also they were great to work with as this was a last minute need it now decision, something made my car start running funny I dont know if it was the pullety or what
http://www.youtube.com/watch?v=TsfU4...eature=channel
I bought mine from Texas Speed also they were great to work with as this was a last minute need it now decision, something made my car start running funny I dont know if it was the pullety or what
http://www.youtube.com/watch?v=TsfU4...eature=channel
