Installed a 3.4" pulley today!!! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-14-2004, 02:38 AM   #1
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Default Installed a 3.4" pulley today!!!

I had to go up to Rockford to buy the pulley and do the swap there. When i installed the pulley, funny thing is the stud broke on the puller right when we finished putting on my pulley. Hopefully it is fully on there. I had to get the bolt out with some needle noses to put the stock bolt back in. The other guy unfortunately had to drive home without a supercharger. He will have to wait to get a stud from thrasher to replace the one that broke on the puller.

The stock belt seems ok for now, I do not notice any slippage. I think I will go with a new belt soon though, I do not believe this one has ever been replaced. The performance increase is awesome. I believe we can gain 25 whp with that right?
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Old 10-14-2004, 02:45 AM   #2
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Usually you need the exhaust done to see 25whp with that size of pulley.
Sorry to hear about the stud breaking, my puller from zzp came with an extra one as it is the weak part in the puller.
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Old 10-14-2004, 02:48 AM   #3
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A quick question for you guys, anyone know where there are instructions on how to adjust the boost bypass valve?
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Old 10-14-2004, 03:11 AM   #4
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Quote:
Originally Posted by Glasuan
A quick question for you guys, anyone know where there are instructions on how to adjust the boost bypass valve?
http://www.bonnevilleclub.com/forum/...ght=adjustment
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Old 10-14-2004, 11:01 AM   #5
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bets bang for the buck mod ,enjoy
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Old 10-14-2004, 11:03 AM   #6
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Quote:
Originally Posted by Paulnold
bets bang for the buck mod ,enjoy
i agree have fun with the xtra boost
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Old 10-15-2004, 12:29 AM   #7
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what do you have to do to the exhaust to see 25 whp?
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Old 10-15-2004, 02:27 AM   #8
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I believe a hi-flow cat, and maybe headers/ported manifolds are needed to see 25 whp with a 3.4" pulley.
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Old 10-15-2004, 11:05 AM   #9
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CAI/3.4 combo should give you 30 bhp give or take 1-2. It comes out to about 22-25 at the wheel. If your getting excessive knock for whatever reason you may not see as much (in which case find out whats causing your KR)
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