Wanted a recommendation for UD pulley. ASP,SLP,ATI? What do you run and are you happy with it ?

 

I have March but slp is the same I think march is cheeper.

 

I don't think they are the same. March is a fluid dampened pully and SLP is not. SLP is also 25% underdrive and March 10%. March is a nice piece.

 

I just wanted the non fluid dampened kind.

 

I had the march and it is a great piece just a pain to get off

 

i went with the ASP sense you can get a alt. pullie to go along with it...

 

March Performance Pulley systems are designed to increase horsepower by reducing accessory drag on your motor. March's new LS1 dampener pulley has a fluid based center, which will not cause spark sensors to retard timing with resultant loss of power. These pulleys have been dyno tested at 12 hp gain and are SFI approved. A new harmonic balancer bolt is included and the two required belts are listed below.

SLP's new 25% underdrive balancer for LS1/LS6/LS2 Corvette's incorporates a number of high-quality features you won't find on any other aftermarket unit. Chief among them are a pair of extra-tall belt-retention walls that eliminate the belt-slippage issues common to other balancers (see photo). Gains of up to 10 horsepower can be expected. Other unique design strengths include 100% steel construction (other brands use steel and aluminum), integral timing marks, and built-in puller-mounting threads. Includes a new balancer bolt and detailed installation instructions.


And I have the SLP one.

 

SLP here.

 

The march is 25% underdrive just like all the rest of them. Mine has been fine so far and appears to be made well and I'm not having any problems with the belt coming off.

 

I have the SLP and it works great.

 

They aren't all 25%. Jegs has one that's only 10%.

 

im happy with the asp. no issues at all.

 

im goin with SLP!

 

Hmm I've never seen one at 10%. But I don't doubt you. Is that a march? I see they have 2 for the LS1 but it doesn't say what % under they are. Actually they look the same but it looks like one comes with the alternater pulley also. The march I bought from Thunder is 25% under. 10% wouldn't be worth doing.

 

I've always heard powerbond makes the slp pulley..

 

I'm running a powerbond no probs with it. No charging issues or anything like that.

 

i want to buy the powerbond but if its gonna slip a belt would rather get SLP

 

asp here i'm happy

 

Thanks for the input guys.

 

You can get their alternator pulley separately in either overdrive or underdrive. I actually use their underdrive alternator pulley with my setup...

I had a Powerbond 25% UD, and now run a full sized ATI Superdamper.