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Thread: underdrive pulleys
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08-28-2008, 07:07 PM #1
underdrive pulleys
whats the deal with underdrive pulleys for ls1? ive heard a lot of people say there no good especially for street...any comments...
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08-29-2008, 01:47 PM #2
I have an SLP underdrive pulley for my TA, works great and it revs faster, havent had any problems with it so I don't know why they would say that they are not good for a street car.
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08-29-2008, 05:41 PM #3
I ran mine on the street with no problems too !!!
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08-29-2008, 06:01 PM #4
Asp underdrive with alternator pully. Runs great no probs on the street!
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08-29-2008, 07:28 PM #5
is there a horse power gain ? if so how much?
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08-29-2008, 07:35 PM #6
For whatever its worth, I always felt that the hp you possibly free up with underdrive pulleys just doesnt warrant the money you pay for them.
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08-29-2008, 08:12 PM #7
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Blue 1997 Trans Am(Sold)- Pewter 2001 Trans Am Vert
not for an expensive one like ATI I was planning on going ATI for an UD pulley and I came to the same conclusion not worth the 400$ minimum that you pay for one... ASP on the other hand is just as good and half the price... I'm putting one on at the same time as my heads/cam/clutch combo might as well free up some extra ponies since you have to take the stock one off anyway... its good for anywhere between 5-10rwhp and people say you gain throttle response aswell... *a good trait for the street in my opinion*
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08-29-2008, 08:28 PM #8
great
thanks im planning on putting one on when i put a cam in
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08-29-2008, 09:50 PM #9
Summitracing has them for like 60-70 bucks
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08-29-2008, 09:57 PM #10
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08-30-2008, 05:58 AM #11
If I remember they were BBK and summitracing brand?
I havent looked at them in a while or it might of been only LT1 but I cant imagine that the LS1 would of been a lot more.
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08-30-2008, 08:52 AM #12
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08-30-2008, 01:37 PM #13
Heres one for 70 bucks for the LT1
http://store.summitracing.com/partde...5&autoview=sku
But after looking for some for the LS1, this is the cheapest I found
http://store.summitracing.com/partde...5&autoview=sku
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08-30-2008, 03:42 PM #14
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08-30-2008, 04:17 PM #15
how did you get the pulley off for the alternator I got the puller but I can't get the bolt off, put the car in forth couldn't get the crank bolt off either going to just wait and get an impact gun to lazy to keep going at it. but when I try with the alternator the pully just spins on the still belt.
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08-30-2008, 04:51 PM #16
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08-30-2008, 04:57 PM #17
lol this is what i figured any suggestions on brands for good prices or where to get everything don't have a compressor or anything yet, also any minimium i need i looked a little saw a lot of them and was looking at hp/psi/gallons what do i really need to get the job done compressor wise.
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08-30-2008, 06:43 PM #18
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08-30-2008, 06:46 PM #19
Oh ya, anything over 90 psi with a regulator will run your 1/2 drive impact just fine.
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08-30-2008, 06:49 PM #20
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