Application: Porsche® 928, 944, 968 models with 6-rib alternator pulleys.

Benefits - Lightweight and Larger: Like an aluminum flywheel, a lightweight alternator pulley reduces rotational inertia on the engine for faster revs and deceleration between shifts. Also, the larger pulley slows the alternator down, saving energy that can now be used instead to drive the car.

The stock alternator pulley is designed for stop-and-go traffic, low rpm's, and high loads caused by accessories and air conditioning. In competition, we rarely idle and our electrical loads are much lower. An underdrive pulley saves HP down low and correctly moves the alternator into the competition RPM band.

Thanks: Thanks to Tim Nagy for the new product suggestion. He got one for free for his idea. If you have a suggestion for a new product you'd like to see, email it to me!

 

And what is the price?
How difficult is it remove the stock pulley?
Thanks!

 

Great idea! Keep em coming Carl!

 

OK, I'll bite.... "recommended" for competition use only.

Soooo, major downside for street application? I know I've seen various modders of different cars using underdrive/different pulleys to boost performance and take some parasitic load off the engine.

If not this one, is there another product doing the same thing that is better for street use?

Regardless, thanks to Carl for continuing to put out products for our cars!!


Dave

 

I would guess that it is recommended for comp only as it will not charge your system well unless you are flogging it.

 

The price is $68.95 and you can order it here: http://www.928motorsports.com/parts/...ive_pulley.php

It is easiest to break torque on the stock pulley nut while the belt is still on.It will help you hold the shaft while you break torque. Then remove the belt, the nut, and the pulley.

Be preparred to go to a larger belt if your tensioner does not have nough movement to allow you to use the belt you have.

 

My car had the whole pully kit from broadfoot racing. Saved about 4lbs total.

On a street car you will notice your lights dim when you come to a complete stop and you are at idle. If you have the AC & Audio on and the car idles long enough...it will eventually drain the battery of all its power.

For a track car or weekend toy...it doesnt bother me. For daily duty, i wouldnt recommend getting lightweight pullys.

Coupled with a 12.5LBS Powerhaus flywheel, the engine revs so so much easier. As far as HP is concerned..you may pick up 1-2BHP if you do all the pully's.

 

Carl, as always another great product. Thanks for your hard work.

 

Thank you. More to come.

 

How about a bolt on oil cooler upgrade using the factory plumbing and dedicated ducting, with a more modern and more efficient cooler such as a Setrab?

Also a modded sump plug with an oil temp sender inside so we can monitor oil temps, or possibly a better location to take oil temps from with a plug and play sender?

 

Nick have you had a look at the 993 oil cooler? Uses stock lines, oil temp sensor screws in. Not as cheap as a setrab but saves a lot of time.

 

I had not thought of that, is it any good? I guess it must be if the 993 is oil cooled only!

 

Myself Sean and Patrick all use them out here(on 951's), a decent oil cooler really helps on the track with a turbo.

 

Any pics of them intalled? Where do you mount them?