Guys with UD Pullies - IN!

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Sep 2, 2005 | 12:39 PM

JoeyAnderson

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From: Winston-Salem, NC

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.

Sep 2, 2005 | 12:45 PM

Z28LS1camaroguy

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From: Northern Kentucky

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.

Sep 2, 2005 | 12:48 PM

Ryan02SS

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From: Lake Anna, VA/ Fairmont, WV

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.

Sep 2, 2005 | 01:00 PM

Ferocity02

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I had an ASP pulley and had no issues throwing belts. A Katech tensioner might help a little.

Sep 2, 2005 | 01:01 PM

777

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From: Jacksonville, FL

I have an asp pulley and have 0 issues.

Sep 2, 2005 | 01:08 PM

KannibaliztikTA

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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.

Sep 2, 2005 | 01:27 PM

WS-Sick

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From: The point of no return...

Did you guys dyno and pick up anything or feel any gains with the pulley? If so, how much?

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Sep 2, 2005 | 02:20 PM

01 Red WS6

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From: Arlington TX

I have an ASP pully and it works fine. I've never had a problem

Sep 2, 2005 | 02:24 PM

#10

jmm98LS1

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From: KS

Quote:

Originally Posted by 01 Red WS6

I have an ASP pully and it works fine. I've never had a problem

same here

Sep 2, 2005 | 02:43 PM

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amit

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From: British Columbia

i just installed mine yesterday.

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

lol

Sep 2, 2005 | 03:44 PM

#12

BAN-LS1

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From: Jefferson, Ga

do ls1's have smog pumps? i know they have an electric air pump

Sep 2, 2005 | 03:47 PM

#13

777

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From: Jacksonville, FL

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.