FEAR THE LS1

iTrader: (1)

I was on the back order list at Thunder Racing for a new ASP Pulley. Angie said that ASP was taking so long to get the pulleys out because they were getting them SFI Approved. TR shipped my pulley yesterday, we'll see if its true when it gets here tomorrow.

Lee

Ryan00TJ

I talked to Thunder earlier and mine is scheduled to arrive today so I will let you know.

johnnyC5

how much are they selling it for? any difference in price for these "new" approved pulleys?

Murdock

iTrader: (2)

98 LPE SS, from www.sfifoundation.com

"The SFI Foundation, Inc. (SFI) is a non-profit organization established to issue and administer standards for specialty/performance automotive and racing equipment."

98 LPE SS

Not to sound dumb, but what is SFI?

Windy City

I just picked up a ASP pulley tonight at Speed Inc and it is indeed SFI approved. Just confirming what's been stated.

Windy City

99Z28RS

Does this by any chance meen that it wont affect warranty?

Rob98Z28

Is it recommended to change both the crank and the alternator pullies, or just the crank pulley alone? I would like to change mine.

LS1LT1

iTrader: (16)

A friend of mine just got one from Summit Racing and it was also the new SFI approved version.




Most people just do the crank pulley but I too am curious if there's any more power to be gained by doing both.

Zeta

It does not look as cool as the origional. The Al center has more appeal than the gloss black.

http://users.foxvalley.net/~greg_gla...ASP_SFI_02.jpg

I know I am whinning about its appearance.

Is the rubber dampener part visable from the back? The new ASP pulley looks like solid metal.

Windy City

I don't see any rubber and it appears to be solid metal.

Zeta

Then the new ASP pulley must have some type of fluid material inside. Which is cool but quite a divergence from the old ASP or the stock pulley dampener design.

I have never inspected a ASP fluid dampener, but my guess is they have employed a similar tecnonogy with the 25% UD pulley.

Larry

iTrader: (4)

The moulded rubber is still in the pulley hidden under the welded on outer metal plate. The plate was added just to keep the outer ring intact and from going towards the engine in the event the rubber fails. The design is the same. SFI just requires to pulley to stay in one piece should the rubber fail. The non-SFI approved pulleys are just fine and really just as safe as the ring would only go towards the engine side prevously. There is a lip on the back side machined into the outer ring that prevents the ring from coming outward but not inward towards the engine.

Keep your old non-SFI approved pulleys. They are slightly lighter and just as safe.

Strini SS

iTrader: (1)

Yeah the new ASP Pulley is alot heavier then the older models... if you can I would get a used pulley.

GeorgeC

But not worth a flip if you need the SFI 18.1 certification on it if you run 10.99 or quicker!

For awhile the expensive ATI balancer was the only solution for those of us required to have an SFI approved balancer, but now there are a few nice alternatives.

I'm very happy with my C.A.T. SFI approved balancer (yes, one of the ones on eBay)...

StrongWS6

I am very happy with mine too!