Print Page - Aftermarket Underdrive Pulley

Title: Aftermarket Underdrive Pulley
Post by: TGP Nick on May 30, 2007, 05:16:58 PM

Is there anyone besides FFP that makes underdrive pullies for our 3.1's? If not, how much did FFP pullies cost when new?
Thanks

Title: Re: Aftermarket Underdrive Pulley
Post by: TGP Nick on June 01, 2007, 07:53:50 PM

http://store.summitracing.com/partdetail.asp?autofilter=1&part=ASP%2D541800&N=700+4294908216+4294840055+4294819990+4294925232+4294839035+115&autoview=sku

Will this ^ work? Even if it fits, 25% underdrive seems high.... would the accessories be okay with this kind of underdrive??

Title: Re: Aftermarket Underdrive Pulley
Post by: jimmy on June 01, 2007, 08:15:36 PM

Nick if you haven't check this out you might want to. just one of the reasons why I stuck with my stock one.

http://www.tgpforums.com/index.php?topic=2705.0

Title: Re: Aftermarket Underdrive Pulley
Post by: TGP Nick on June 01, 2007, 09:17:27 PM

So.... if I'm understanding this correctly- the OEM pulley has a rubber seal on it and the FFP one doesn't, causing the bottom end to be unstable, hurting the crank bearings? correct me if I'm wrong- just trying to understand this...

Title: Re: Aftermarket Underdrive Pulley
Post by: jimmy on June 01, 2007, 10:39:27 PM

   So-- so what your really paying for is more problems, you really ain't gaining nothing. you're just trading off is all your doing.

   Untill something substantial showing me a full gain comes forward, I really don't see myself wasting money like that :deal:.

   Now like the FFP motor mounts and their coil-overs, that to me is a 100% gain no loss. but I guess if you have your heart

   sold on it there ain't no stopping ya. Try-em out and let me know Nick. jimmy :thumb:

Title: Re: Aftermarket Underdrive Pulley
Post by: TGP Nick on June 01, 2007, 10:45:27 PM

Meh now after what you have told me, I don't really wanna try it.... espacially with all the problems I've been having with it lately.... thats all I need is a thrown out crank bearing! :icon_rolleyes: :laugh:

Title: Re: Aftermarket Underdrive Pulley
Post by: GOT2B GM on June 02, 2007, 02:11:34 PM

People have been running FFP UD pulleys for thousands of miles with NO ill effects.

Title: Re: Aftermarket Underdrive Pulley
Post by: GOT2B GM on June 02, 2007, 02:12:56 PM

Not to mention 60* V6's are internaly balanced, unlike the 90* V6's that rely on the harmonic balancer to balance vibrations from the engine.

Title: Re: Aftermarket Underdrive Pulley
Post by: TGP Nick on June 03, 2007, 07:15:41 PM

After re-reading all that again :laugh: I have a question: do the OEM crank pullies on our cars have harmonic balancers or ANY kind of balancers whatsoever?? I always thought they were just pure metal, with nothing else in there- no balances, weights, etc.... please correct me if I'm wrong

Title: Re: Aftermarket Underdrive Pulley
Post by: GOT2B GM on June 03, 2007, 09:30:51 PM

its just a cast iron pulley.

Title: Re: Aftermarket Underdrive Pulley
Post by: TGP Nick on June 03, 2007, 09:33:59 PM

So, if there is no rubber balancer or harmonic balancer on them, why is everyone freaking out? The FFP pulley for example should be no different, other than being lighter and slightly smaller.... any argument against this?

Title: Re: Aftermarket Underdrive Pulley
Post by: GOT2B GM on June 03, 2007, 09:36:38 PM

I dont see the big issue with this on these motors, but if someone knows otherwise, please chime in.

TGPForums.com

GENERAL => General => Topic started by: TGP Nick on May 30, 2007, 05:16:58 PM