Gruppe-S Light Weight Pulley - 02-05 WRX/STi
$110 INSTALLED OTD ! Reg. price is $89 shipped!
1 WEEK ONLY, ENDS 6/14/05
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~The Gruppe-S Light weight pulley is designed to replace the excessively heavy factory pulley. CAD Designed and CNC precision cut, our pulley weighs in at 1.2 lbs a huge rotational mass savings over the factory pulley.

~The addition of a lightened pulley great improves engine response and allows for a faster rev. Greater mid-range power can also be achieved with proper tuning.

~Our lightened pulley is not under-driven to insure maximum connectivity of belts and components.

~Anodized red, the Gruppe-S pulley will out last, provide increased performance versus, and look flashier than the factory pulley. Plus it is easily installed.


Regards,

Preston

Gruppe-S Engineering
29150 Simms Ct.
Hayward CA 94544

Phone: (510) 783-5300

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For the idiots such as myself...could you further explain what exactly is "under-driven"? also another stupid question, being that it's just a hunk o metal, but what's the warranty?

 

An underdrive pulley will drive all of your accessories slower, therefore dropping the charging systems capability.

2 yr warranty

Thanks
Preston

 

How long is the installation?

 

less than 1 hr

Thanks
Preston

 

I know it won't affect none of the electical stuffs, but does it affect the crank when it rotates? Does it affect the engine? Do I have to do any remapping(ECUtek) or any other EM for it? Sorry for many questions, but I really want one of this. Thanks

 

You don't need to reflash your ECU to use this mod but tuning doesn't hurt.

Thanks
Preston

 

You need to make some that isn't so bling bling.

 

currently, I have up, dp, and exhaust with EcuTek, I was wondering if I add this on, would it cause my current map to run rich or lean or any other problems if I dont tune it.
-Mark C.

 

You can't see it once it's installed

chakming888 - It won't affect your map to run rich or lean. It improves engine response and allows for a faster rev.

Thanks
Preston

 

Does this package include a trip around the block in the shops Evo with the hot Altezza's??

 

are you sure it's undetectable when installed? I thought it's right up front and center in the engine bay?

also, have you guys had the opportunity get a WRX w/the pulley on the dyno to see if there's any actual hp benefit (however minimal)? Some companies claim anywhere from 1-8 hp from their pulleys.

 

Would this work on a 2.2T?

 

Hey guys,

The crank pulley is in front - it's hard to see, but if you're looking for it you'll see it.

A crank pulley gains a few whp on the dyno, but primarily it assists in a faster and smoother rev as you're essentially lightening mass off the rotating assembly. I noticed a fairly big difference after installing the crank pulley. The effect is similar to a lightened flywheel.

Word of caution, not for use with an excessively light flywheel (such as 9lbs) as this will trigger misfires (too much mass reduction).

Cheers,

Gary
Gruppe-S

 

Gary, are you saying that we don't have to have lighten FW if we are gonna have these?