Disadvantages of underdrive pully
TECH Resident
Joined: Nov 2002
Posts: 996
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NONE!
Only good things happen:
More rwhp and rwtq.
Longer life for your accessories.
You can add it to your sig.
You will go faster.
Unless you are running some major aftermarket eletric power sucking accessories, don't worry...
Tommy
Only good things happen:
More rwhp and rwtq.
Longer life for your accessories.
You can add it to your sig.
You will go faster.
Unless you are running some major aftermarket eletric power sucking accessories, don't worry...
Tommy
Thread Starter
TECH Regular
Joined: Nov 2001
Posts: 415
Likes: 0
From: Plano, TX
Originally Posted by TaTommyWS6
NONE!
Unless you are running some major aftermarket eletric power sucking accessories, don't worry...
Tommy
Unless you are running some major aftermarket eletric power sucking accessories, don't worry...
Tommy
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
Originally Posted by pewter99SS
That is what I was worried about. I was going to add a system to my car and was thinking it would be a bad idea to do pullies with the system.
TECH Apprentice
Joined: Jul 2002
Posts: 393
Likes: 0
From: Tucson, AZ
Originally Posted by pewter99SS
What are the disadvantages of getting one?
Thanks,
Dave
Thanks,
Dave
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ASP's underdrive pulley is a great piece. First I got ripped off by SLP when I bought one of their's for my '99 SS car. SLP's pulley gave everyone's LS1 car knock retard between 48-5000 rpm. It actually hurt performance. The best part is--they wouldn't admit it. Mine's still sitting in a corner of my garage--the "junk" area. Installed ASP's unit--KR gone. I have the same one on my '02 SS now. SLP = 
Damn I am fighting a KR issue and also have the SLP pulley. Guess what I will be doing in the near future 
Edit
Sorry to get off topic but can someone explain to me how the pulley creates KR
Edit
Sorry to get off topic but can someone explain to me how the pulley creates KR
Last edited by HumpinSS; Oct 27, 2003 at 01:34 PM.
Somehow it's creating resonance or slight vibration and pcm is picking it up...The units were probably improperly balanced themselves upon manufacture. You know, "quality control" issues vs. "we'll send them out anyway, and maybe they'll be dumb enough not to know they're causing problems"....... WJ. 
TECH Addict
Joined: Mar 2002
Posts: 2,189
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From: Glendale, CA
Let's say you put the pulley in, gives you 10rwhp. Then you add a huge heavy sound system that adds a good amount of weight to your car.
The added weight from the sound system will cancel out the added HP from the pulley.
Just my 2 cents.
The added weight from the sound system will cancel out the added HP from the pulley.
Just my 2 cents.
Thread Starter
TECH Regular
Joined: Nov 2001
Posts: 415
Likes: 0
From: Plano, TX
Originally Posted by BigBlackZ28
Let's say you put the pulley in, gives you 10rwhp. Then you add a huge heavy sound system that adds a good amount of weight to your car.
The added weight from the sound system will cancel out the added HP from the pulley.
Just my 2 cents.
The added weight from the sound system will cancel out the added HP from the pulley.
Just my 2 cents.
Besides, they will be removed at the track anyway. 
I have the asp underdrive crank pulley and the stock alternator pulley. I have no charging problems with a three year old battery and a large sub and large amp. BTW, this is through an a4
TECH Junkie
Joined: Jan 2002
Posts: 3,015
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From: At the office
I have an ASP, but the older model which I have does not have the same harmonic dampening abilities as the stock one so I've been told. That could very likely diminish engine life in the long run, especially if you spin the motor to high rpms.