Underdrive pulleys [ merged 1/6/07]

[larryd]

Worth it or not? I'm thinking of going with the AEM tru-power pulley kit. Anyone used them?

 

[elementalwindx]

Anyone want to post they're opinion on the best underdrive pulley kit for a 95 2g gs-t? and perhaps even the best priced seller?

 

[out there]

have you talked to people that have used underdrive pulleys? i was talking to a guy at a local shop and he suggested staying away from them because your alternator won't produce enough power to run all of your accessories. i was considering the lightened pulleys from machv... but i decided the gains weren't worth the risk of potential damage

 

[elementalwindx]

Originally posted by out there
have you talked to people that have used underdrive pulleys? i was talking to a guy at a local shop and he suggested staying away from them because your alternator won't produce enough power to run all of your accessories. i was considering the lightened pulleys from machv... but i decided the gains weren't worth the risk of potential damage

Im not sure but i did read that in the summery about the AEM pulleys. but i dont think they make them for our 2nd gens. if anything i could just get the crank pulley and i suppose that wouldnt affect the alt or water pump in any way.

 

[BD1]

I have seen UDPs for both models of 2Gs. There is no risk envolved, just have it professionally installed.

 

[IMMORTALSPYDER]

Make sure the crank pulley has a damper on it like this- http://www.machv.com/busracunpul.html

 

[elementalwindx]

Originally posted by IMMORTALSPYDER
Make sure the crank pulley has a damper on it like this- http://www.machv.com/busracunpul.html

errr....mmmk i wonder if thats worth 350. and if its better than OEM and lighter. they are real skippy on the details eh?


and how do u "professionally" install them? Lol u just unbolt them, take the OEM off, and bolt the AM back on.

 

[BD1]

Originally posted by elementalwindx

and how do u "professionally" install them? Lol u just unbolt them, take the OEM off, and bolt the AM back on.

Take it to somebody that knows how to do it and has the right equipment, that is what I meant.

 

[Mike1992]

I installed one of the underdrive crank pulleys on my car a few weeks ago, and drove the car maybe 3 times max of 10 miles since then. Parked it for a week,Went to start the car up battery is dead, I jumped it and drove it around for a good 15 mins, then parked it. 2 days later went to start it up and the battery is dead again WTF. Battery is fairly new on a few months old. All the belts are tight no squeaky squeaky. I did however notice the lights are dim unless i hit the gas.

I guess the only way to find out is to get me a voltometer and check it out, but if yall have similar problems maybe some opinions would get me thinking. i think the UDP is underdriving things so much Im not charging fast enough on my draw

 

[redturbo66]

What's involved on the install of a crank pulley in a 99 gst? Will I see a difference in power?

 

[Mike1992]

Removal of 2 belts ( alternator/waterpump and a/c compressor belts) then remove 4 bolts on the old pulley and then put it all back togeather with shorter belts

 

[redturbo66]

Will I have to pull the engine to do this or lift it? Or can I just do it in my parking lot, standing over the car?

 

[Mike1992]

i had to take the driver side motor mount off and bring down the motor a tad, remove the splash gaurd and wheel for easy access. Its not a big deal should take a few hours

 

[Defiant]

Apartment life? Working in the lot?

Don't bother. The payoff won't be worth the agony.

 

[redturbo66]

Originally posted by Defiant
Apartment life? Working in the lot?

Don't bother. The payoff won't be worth the agony.

So I should just pay someone to do this for me?

 

[blMuskrat]

find someone with a garage who will help you

 

[redturbo66]

Thanks for the help guys........I'm looking for a garage now. Just one more question, though.......for anyone who's already done the UDP, how much of an increase in HP is it??

 

[Mike1992]

I have one installed, i didnt really notice a hp gain, however a little tap of the gas pedal makes the rpm's float up much faster :laugh:

 

[L2RTSiAWD]

I have a full-set of underive pullies.

I payed someone to install them.

 

[BlckTalon]

how much was the complete pulley kit, and how much did it cost you to have someone install them?

 

[Mike1992]

A complete pulley kit is about $400 plus thats why I opted for just the crank pulley which cost me about $50 off ebay and is a noticeable difference alone

 

[L2RTSiAWD]

I bought the pulley kit from www.dsm-performance.com back when it was on sale. I don't remeber how much I paid to put it in but it was less than 80.

 

[doug]

The HP gain is minimal and unnoticeable for the most part. Don't do it if you're only doing it for HP gain. If you're gonna do it, do it because you're concerned that the 2-piece stock pulley may separate on you one day.

 

[redturbo66]

do you think it's a bad idea to only replace the UDP and no other pulleys?

 

[JiveMasterT]

sorry to jack the thread, but does it also speed up your revvs like a lightened flywheel does? thats bad phrasing, but you know what i mean.

 

[doug]

Originally posted by redturbo66
do you think it's a bad idea to only replace the UDP and no other pulleys?

IMO, no. You will still need slightly shorter accessory belts, though. I went to about a 1/4" shorter (or either 1/2" I don't remember) A/C belt and alternator belt.