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Guys with UD Pullies - IN!

   
Old Sep 2, 2005 | 12:39 PM
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Exclamation Guys with UD Pullies - IN!
Seems like most of the local LS1s with U/D pullies have issues with throwing belts - Why?

I'm likely going with a Powerbond, and the belt will be shorter since it won't be turning a smog pump.

Any insight as to the cause of belt-throwing, and any way I can eliminate this issue? I'd rather not have to re-install a belt while out on a date, etc...

The car will see ~6800rpm at the strip, rev limiter is set to 7k.
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Old Sep 2, 2005 | 12:45 PM
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i dont think it is neccessarily the pulleys fault as driver error is, i mean some people dont really know what they are doin when it comes to pulleys considering you have to check the tension and all that. when you buy a underdrive pulley you may want to get a new tensioner pulley as well to kind make sure the tension will be good and secure.
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Old Sep 2, 2005 | 12:48 PM
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From what i've seen it's mainly due to not having the new pulley all the way seated on the crankshaft hub. Follow the proper procedure for installing the crank pulley, make sure it is all the way seated and the pulleys line up perfectly. Use the correct length belt and no problems should be had. ASP here 2 years no lost belts.
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Old Sep 2, 2005 | 01:00 PM
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I had an ASP pulley and had no issues throwing belts. A Katech tensioner might help a little.
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Old Sep 2, 2005 | 01:01 PM
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I have an asp pulley and have 0 issues.
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Old Sep 2, 2005 | 01:08 PM
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i have powerbond and no belt issues....just lost a little voltage when im stopped in traffic....no biggie i guess....u wont get that problem with an M6 though.
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Old Sep 2, 2005 | 01:27 PM
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Did you guys dyno and pick up anything or feel any gains with the pulley? If so, how much?
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Old Sep 2, 2005 | 02:01 PM
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I couldn't tell how much the pulley was worth because I did heads and cam at the same time, but they have been shown to produce a consistent 10rwhp ish gain.
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Old Sep 2, 2005 | 02:20 PM
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I have an ASP pully and it works fine. I've never had a problem
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Old Sep 2, 2005 | 02:24 PM
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Originally Posted by 01 Red WS6
I have an ASP pully and it works fine. I've never had a problem
same here
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Old Sep 2, 2005 | 02:43 PM
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i just installed mine yesterday.

i rifled that **** on with an impact gun pretty good. it aint going no where!

lol
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Old Sep 2, 2005 | 03:44 PM
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do ls1's have smog pumps? i know they have an electric air pump
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Old Sep 2, 2005 | 03:47 PM
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No smog pumps. I didn't really notice anything from the pulley really, but my SOTP meter is very very bad. I think the minimum power increase for me to feel would be like 25rwhp.
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Old Sep 2, 2005 | 06:38 PM
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ASP pulley here, along with the underdrive pulley. No issues at all.
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Old Sep 4, 2005 | 01:28 AM
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asp here and ive never had any issues with it...
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Old Sep 4, 2005 | 08:28 AM
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Powerbond here. No probs yet.
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Old Sep 4, 2005 | 08:58 AM
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I've had an ASP on since 2001 with no issues. It was kind of a pain to install, but a good mod nonetheless...
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Old Sep 4, 2005 | 05:22 PM
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i had problems due to cheap belt. i bought a gatorback and have had no problems since ASP.
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Old Sep 4, 2005 | 05:26 PM
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Originally Posted by JoeyAnderson
I'm likely going with a Powerbond, and the belt will be shorter since it won't be turning a smog pump.
Huh? The air pump isn't belt driven on our cars.
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Old Sep 4, 2005 | 05:39 PM
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Both ASP and Powerbond make good pullies. I like the Powerbond better though.
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