ASP vs. SLP
Thread Starter
Teching In
Joined: Mar 2006
Posts: 7
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From: Minnesota
ASP vs. SLP Whats the difference between ASP & SLP underdrive pulleys? I was told the SLP crank pulley was about $230. Im looking in the summit mag and they have the ASP crank and alternator pulley for $199.99. Why such a big price difference??
TECH Apprentice
Joined: Mar 2005
Posts: 368
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From: Raleigh,NC
- Extra-tall belt-retention "walls"--no more thrown belts!
- No aftermarket tensioner required
- 100% steel construction
- Lighter than the stock balancer
- Integral timing marks and puller-mounting threads
- Keyed for high-rpm or supercharged applications
- Does not cause false knock retard or erratic power-curve dips
- Includes a new balancer bolt
- This is what you need to know about SLP Pulley
Originally Posted by KILLERARMY
- Extra-tall belt-retention "walls"--no more thrown belts!
- No aftermarket tensioner required
- 100% steel construction
- Lighter than the stock balancer
- Integral timing marks and puller-mounting threads
- Keyed for high-rpm or supercharged applications
- Does not cause false knock retard or erratic power-curve dips
- Includes a new balancer bolt
- This is what you need to know about SLP Pulley
That's why I bought mine. It's a very nice pulley, and it's made by Powerbond. SLP just calls it theirs. I refuse to buy stuff from SLP on principle alone.
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I would say all pulleys are relatively the same...performance wise. The only reason why I will be going with the SLP is because of the taller walls. This will prevent throwing belt, which nobodys wants to happen. Its a little more expensive but a small price to pay for the added insurance.
the ASP will work you'll just have to replace your belt tensioner pully with a 3.8 Supercharger Driven pulley. I have the part number for that. the SLP might do well, i dont know cause i havent used it. But either way you dont know till you try
Teching In
Joined: Dec 2005
Posts: 40
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The pros of an underdrive pulley are increased horsepower by eliminating the parastetic drag that the accessories apply to the crank. By minimizing the diameter of the crank (drive pulley) you allow the crank to spin faster/ more free because it will rotate the accessories slower.
the down side is when turning your accessories slower some applications tend to experiance a low charge from the alternator, or on an exessive street build may possibly have a temperature increase.
The alternator can be solved by purchasing a smaller pulley to increase the speed ratio on the alternator, closer to what it may have been stock.
Usually an underdrive pulley on a LS1 will get you a total of 10-12 fly wheel hp when used with the over drive alt pulley I believe you should see 6-8.
the down side is when turning your accessories slower some applications tend to experiance a low charge from the alternator, or on an exessive street build may possibly have a temperature increase.
The alternator can be solved by purchasing a smaller pulley to increase the speed ratio on the alternator, closer to what it may have been stock.
Usually an underdrive pulley on a LS1 will get you a total of 10-12 fly wheel hp when used with the over drive alt pulley I believe you should see 6-8.
You can get the SLP pulley from New Era Performance Parts for $206.95 with free shipping. They are a sponsor on this board >>>>>>>>>>
http://www.neweraperformanceparts.com/
http://www.neweraperformanceparts.com/
Originally Posted by FUN LS1
I didn't see on TSP's site an alternator overdrive pulley for the Powerbond. Can you use the ASP OD alternator pulley with the Powerbond?
You don't need, or want an OD alternator pulley unless you have a big stereo system.
