davered00ss

iTrader: (4)

Is one better than the other? Looking at ordering one today or tomorrow. SLP or ASP? I know the powerbond is the SLP. March, I thought I heard about some issues.

ski23

iTrader: (21)

just had the pwerbond installed. damn its nice compared to the stock 1. if you go with asp i hear you gotta buy the katech tensioner to prevent belt slippage. this is why i jumped on the powerbond

Z28XTC

iTrader: (5)

Should have got the march no issues with ls1 pulleys some of there other products got recalled but Ls1 pulley has fluid damper

TheBlurLS1

iTrader: (8)

I've seen alot more problems with belt throwing/slippage out of the March pullies than the ASP's lately.

Redneck Z

iTrader: (3)

I think the Powerbond/SLP pulley is the best.

SLP's new 25% underdrive balancer for LS1 F-Bodies 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 endemic to other LS1 balancers (see photo). 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.
FEATURES:
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

davered00ss

iTrader: (4)

That sounds just like the advertisement I read on Speed Inc., 's web site.

00454sscamaro

i put on the slp underdrive pulley on my car a couple days after installing a mezeir water pump... the water pump gave more noticible effect on performance.. but the slp is well made , alot nicer then the stocker and the belts they recomend are even alil tighter then the stock belts with stock pulley.. the stocker was a bitch to get off, retards should of desined it to have atleast bolt holes in it or something , with the slp i know if i ever need to take it off atleast i got an easier way.. i redlined my car alot since its been on so i dont think its going to slip off the grooves are deeper then stock and its shinny too haha .. but some advise.. leave the pulley in the box till your ready to install, i had mine out for a couple days and the inside started to rust alil.had to use a washer and a small sledge hammer to get it on far enough to catch the threads .. also make sure you got a few rows of threads before you use the bolt to pull the pulley in.. you dont wanna strip the crank threads.

davered00ss

iTrader: (4)

I have done several cam swaps, so I know all about installing it. Thanks for the advice

DuronClocker

iTrader: (25)

Are the ASP or SLP ones SFI approved at all? I don't know how serious track techs are about SFI approved balancers and flywheels with low 11 and mid 10 cars on test n tune nights.

I think I'm going to order one in the next few days to go along with the rest of my motor I'm putting together. For the same price as the SLP one, I can get the ASP one with the alternator pulley too...which would probably be a good idea for me if I'm going to have a 10" sub in the back too..

VA2001SS

The SLP/PowerBond is SFI 18.1 approved.

orangeapeel

iTrader: (18)

Ditto

davered00ss

iTrader: (4)

I just ordered the SLP pully from Speed inc. They had the best price and free shipping.

Larry

iTrader: (4)

My ASP is SFI apprived. Has the SFI sticker on the front.

davered00ss

iTrader: (4)

The newer ASP pully's are SFI approved, the older ones were not.

Grimes

iTrader: (3)

asp here, no problems at all.

DuronClocker

iTrader: (25)

Good to know. Can I buy an alternator pulley separate for an SLP/Powerdone balancer?

Z28XTC

iTrader: (5)

Are the March LS1 pulleys lighter because they are Aluminium?
I have a March Pulley on my 3rd gen and never had a problem.
I just got my belts in the mail yesterday so my March pulley,160 thermostat and SSRA will be going this week hope to see some extra power.

00454sscamaro

id say the march pully is most likely alot lighter, especially if its all aluminum.. my slp one was almost as heavy as the bigger stocker.

sstony

i have to vote SLP cuz i run the SLP pulley and have had no concerns. i did have to change out my belts after 1 year due to noise, but thats about it.

Synister_Motorsports

iTrader: (2)

The March is actually one of the heaviest pieces. It is manufactured from carbon steel and filled with high viscosity fluid. However the Horsepower is not achieved through the loss of reciprocting mass so it is irrelevant. The horesepower is achieved through the differnet size of the pulley drastically affecting accessory belt speed. All the companys listed March, ASP, and SLP average about 10-12 hp gains with crank pulley when adding the overdrive alt pulley you should see an average of 8-10 hp. Another thing that you should look for is an SFI approval. I belive all that are listed have them now but that is something that you may want to look into.