? underdrive pulley ( any problems for a daily driver )
Thread Starter
Instructor
Joined: Aug 2003
Posts: 232
Likes: 0
From: Fort Lauderdale florida
? underdrive pulley ( any problems for a daily driver )
I'm building up my 2001 engine. Should I install a underdrive pulleys ?
I use the car as my daily driver.
1 will my lights dim at idle
2 will the water pump speed be ok for stop and go trafic
3 a/c unit ? I live in florida heat ( in city driving )
Thanks Mark ( I'm planning on looking for one at the show if it makes sence for my driving conditions )
I use the car as my daily driver.
1 will my lights dim at idle
2 will the water pump speed be ok for stop and go trafic
3 a/c unit ? I live in florida heat ( in city driving )
Thanks Mark ( I'm planning on looking for one at the show if it makes sence for my driving conditions )
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Re: ? underdrive pulley (mstewart)
Shop that did my head/cam and had dyno'd underdrives said that they do not add any power or Tq to the LS1. Skipped that mod as as waste of $$.
Fred K. :nono:
Fred K. :nono:
Le Mans Master
Joined: Mar 2002
Posts: 5,718
Likes: 2
From: Flower Mound TX
Cruise-In V Veteran
St. Jude Contributor
Re: ? underdrive pulley (FKING1)
Shop that did my head/cam and had dyno'd underdrives said that they do not add any power or Tq to the LS1. Skipped that mod as as waste of $$.
Fred K. :nono:
Fred K. :nono:
Supporting Vendor
Joined: Jul 2003
Posts: 6,486
Likes: 2
From: http://www.mphparts.com 800-364-1975
Re: ? underdrive pulley (mstewart)
I'm building up my 2001 engine. Should I install a underdrive pulleys ?
I use the car as my daily driver.
1 will my lights dim at idle
2 will the water pump speed be ok for stop and go trafic
3 a/c unit ? I live in florida heat ( in city driving )
Thanks Mark ( I'm planning on looking for one at the show if it makes sence for my driving conditions )
I use the car as my daily driver.
1 will my lights dim at idle
2 will the water pump speed be ok for stop and go trafic
3 a/c unit ? I live in florida heat ( in city driving )
Thanks Mark ( I'm planning on looking for one at the show if it makes sence for my driving conditions )
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Re: ? underdrive pulley (diynoob)
Not to belabor the point, but this was not an opinion but backed up with Dyno FACTS. This shop does work for Katech so they are reputable too.
Fred K. :steering:
Fred K. :steering:
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Burning Brakes
Joined: Jun 2002
Posts: 1,055
Likes: 0
From: Troy MI
Re: ? underdrive pulley (bk)
My underdrive hasn't caused any adverse affects on my electrical.
At night w/ AC, 7" Wide Screen, DVD player, and Subwoofer no issues!
Make sure you torque down the crank bolt as much as possible. When I did my cam swap originally the pulley was out of stock, so I didn't do it. But then the crank bolt walked out because the GM torque spechs aren't enough, so when I fixed it I decided to put the pulley on.
At night w/ AC, 7" Wide Screen, DVD player, and Subwoofer no issues!
Make sure you torque down the crank bolt as much as possible. When I did my cam swap originally the pulley was out of stock, so I didn't do it. But then the crank bolt walked out because the GM torque spechs aren't enough, so when I fixed it I decided to put the pulley on.
Intermediate
Joined: Jan 2004
Posts: 37
Likes: 0
From: KANNAPOLIS N.C.
Re: ? underdrive pulley (mstewart)
I know that alot of people say they have no problems but at night in traffic with lights, a/c, radio, and both fans on I have seen my volts drop to 11.6 but to this point no problems other than lights going dim.
Instructor
Joined: Sep 2003
Posts: 145
Likes: 0
From: Scottsdale Arizona
Re: ? underdrive pulley (mstewart)
I just removed mine due to knock at higher rpm. My car is a daily driver in Arizona. The lights did dim a little but no other problems. IMO.....skip the UD Pulley and go for the electric water pump. Why? more hp/tq, way better cooling for the heat and no knock.
