LS1 Brent

i know that pulleys include the alternator belt but what does the other belt pull? and also i heard that some stuff can happen with the crankshaft ( i guess thats what the other belt is for)? and what are the ups and downs of getting the asp pulleys?

LS1 Brent

???? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

Jeffs99SS

I don't believe the ASP pulley comes with any belts, unless the dealer sells it as a package. You will need 2 belts. The one you are referring to is a serpentine belt that runs the alternator, p/s, etc. The second belt is for the a/c compressor.

There are a lot of people here that have the pulley and love it. Some would say to run the crank pulley only, and leave the alternator pulley stock. You'll probably see around a tenth in the 1/4.

Jeff

talonis

I was researching pulleys too. After reading a lot, I found that:

-The crank pulley will allow the engine to rev up faster and has some noticable gains when you put it on. ASP pulleys I have not found any complaints about, however many people have reported problems with the SLP underdrive pulley.

-The alternator pulley will "in theory" give you some gains, however nobody has really reported getting much out of changing this pulley out. I guess it's kind of like the TB bypass, in theory it'll give you some more power, but you won't really notice it. Unlike the underdrive pulley I have read that many people experience electrical issues after installing, and many take it off. There are some that don't have problems.

You can draw your own conclusions, but my personal opinion is that the ASP crank pulley is a good mod but the alternator pulley is probably best left out.

<small>[ December 19, 2002, 08:40 AM: Message edited by: talonis ]</small>

OctaneZ28

iTrader: (6)

I have the ASP pulley and have been very pleased with it. There was a noticeable gain immediately.
I'm gonna get the alternator overdrive pulley though, because sitting at a red light my power drops down to like 6-7 volts. Not enough.
Having to shut stuff off at red lights to keep the car running is getting a tad annoying.
Normally it wouldn't do this, but I'm running a subwoofer in the trunk which tends to eat alot of power.

<small>[ December 19, 2002, 04:14 PM: Message edited by: OctaneZ28 ]</small>

KatmanSS

Another newbie weighing in here... as I understand it, both the alternator and crank pulleys are driven by the same serpentine belt. When changing out either (or both) pulley(s), is a different belt required, or will the tensioner compensate for the difference?

Quickin

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LS1 Brent:
and also i heard that some stuff can happen with the crankshaft QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You heard right. I was told by ARE that a pulley can damage the motor internally if it gets loose. Periodic checks to make sure it's tight must be done. I considered not having one put on my motor so I wouldn't have to worry about it. But ASP has fixed the problem pretty well that used to cause ALLOT of trouble. Just check it every now and than.

eallanboggs

iTrader: (1)

Get a 120mm bolt instead of the factory 103mm bolt. That gives you a lot of extra purchase. The bolt is torqued to 240 ft/lb so if that bolt backs itself out your girlfriend has some very powerful voodoo that a gallon of Locktite won't cure.

SSLink

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by KatmanSS:
<strong>Another newbie weighing in here... as I understand it, both the alternator and crank pulleys are driven by the same serpentine belt. When changing out either (or both) pulley(s), is a different belt required, or will the tensioner compensate for the difference?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">A different belt will be required.The tensioner will not compensate enough. A list of the various belt size part numbers is included with the pullies. <img border="0" alt="[Driving]" title="" src="graemlins/gr_driving3.gif" />

Benjamin Russick

iTrader: (1)

The alternator pulley is not designed to free up horsepower like the crank pulley, but to increase the alternator RPMs in compensation. I have the ASP pulley and honestly haven't noticed much of a difference. When I put pulleys on my 5.0 GT, it was very noticeable...hmmm.

2001CamaroGuy

iTrader: (6)

I have the ASP crank and overdrive alternator pullies. I noticed a gain right away. The car revs faster and pulls stronger at high RPM.

Remember to get a new crank bolt. I have heard of people using the old bolt or not tightening it enough. Then over time it backs out and before they know it their crank pulley falls off.

Chris

SSLink

There are two different alternator pullies available from ASP. One is underdrive like the crank pulley, the other overdrive. On my M6 I use neither. The u/d alternator pulley spins your alternator more slowly, giving you a theoretical further HP increase, but at the expense of even lower voltage. On an A4 (lower idle speed) with a stereo upgrade you may notice your voltage dropping a bit low at idle with your headlights and engine fan going while you have your tunes cranked, even with just the crank pulley. The o/d pulley will spin your alternator a bit faster to compensate, at the expense of some of the HP gain from the crank pulley. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

ASP provides the part numbers on the belts you will need, and some vendors do supply them as part of a package. <img border="0" alt="[burn out]" title="" src="graemlins/gr_burnout.gif" />

QuickSliver

I have an A4 with the stock stereo. I also will be putting a FTRA kit on. I sit in alot of rush hour traffic in the summer and with the FTRA I'll have the fans manully turned on. Should I get the Alt pullie or to compinsate for the fans or leave it alone. I was thinking of jst getting the crank and keep an eye on it for awhile and see what happens. The price of a new belt if I had to buy the Alt pully is no big deal. Thanks for your help.

GeorgeC

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Benjamin Russick:
<strong> The alternator pulley is not designed to free up horsepower like the crank pulley, but to increase the alternator RPMs in compensation. I have the ASP pulley and honestly haven't noticed much of a difference. When I put pulleys on my 5.0 GT, it was very noticeable...hmmm. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That's incorrect... The ASP alternator pulley is larger than the stock one, resulting in the alternator being turned slower at any given engine RPM...

Colonel

Yep, that's the way mine was. My alternator pulley was larger than stock making it turn slower. I hear of people talking about alternator overdrive pulleys here all the time. I've always wondered is there such a thing or are they mistakenly calling an underdrive pulley an overdrive pulley.

Remember, smaller on the crank = underdrive. LARGER on any accessory also = underdrive.

Colonel

"I was thinking of jst getting the crank and keep an eye on it for awhile and see what happens."

I agree. I don't think you'll find your battery dead.