BC

I was looking around these boards, and found that a company called "Fidanza" makes lightwight flywheels for the 944, and thier prices are pretty damn good when you make them make more. I emailed Mr. Fidanza, and I recieved this reply:
""
Brendan,

This is something we could probably do. We would need the OEM
flywheel for starters. For just one flywheel we're looking at around
$1800.00-2500.00 and a 6 month waiting period. If we're looking at 10
units they'd be $319-359 each. Waiting period of 1-2 months.

If you have any other questions please feel free to contact me.
Sincerely,
Tom
"""

So if we get 10 or more people to do this, then we are looking at a flywheel that will be less then the OEM one, and lighter.

The issue here is that I asked him about the 84 flywheel for the twin disk clutch system. This is what I will be retro-fitting onto my 89 so I can put more power through the system.

So this would be for both 80-84 people who want a lighter flywheel, and those people after 87 that are retrofitting the twin disk setup (which is cheaper at clutch kit levels) for more power.

EMail me at the address on my profile, or you can just put your stamp of approval here on this thread to see if we can put this together. Maybe if there is over 10 we can go a bit deeper then the price he said.

Toejam

:x the '78 flywheel is different?

BC

I do think believe so Chris. That doesn't mean you can't do this if you can get 10 78 and 79 people together though. That also does not mean you could update your flywheel and the other pieces to get this, if your system needs work from wear.

I'm going by the published years for parts in the PET software, as well as 928intl.

heinrich

Brendan. I'd be intertested.

BC

Great Heinrich. I knew you'd be game.

Gretch

Brendan, what is involved with the retro fit? is it just bolt on?

Jim bailey - 928 International

78-79 is one fly wheel with a lip , 80-84 another no lip pin centered , 85-86 pin center AND timing ring number of small teeth for 85-86 , 87-92 pin center and timing ring for number of large teeth for the 87> brain . The "custom" small diameter flywheel for the two disc clutch we have used is an early flywheel BUT with the timing ring from an automatic 87> pressed on !! So the 87 and newer cars must have the correct number of teeth on the timing ring to converse with the brains . Brendan using aftermarket injection engine management may not need a timing ring on his flywheel . I find it interesting that the shop can quote prices for a flywheel they may have never seen and for that matter believe thay can make it lighter ? The small flywheel weighs about 10 lbs and there is little "extra" material .

Lizard928

Jim, the factory flywheel is steel correct if they make it outta aluminum then it will be lighter.

Jessa

Would an aluminum flywheel be strong enough for the higher power applications?

BC

When you and I have our 89s back on the road , the pieces we need are the flywheel from 80-86, the clutch kit from the same years, and a few changed pieces like the sleeve

Jim bailey - 928 International

Aluminium flywheels typically must have a friction surface riveted to the face steel / copper for the disc to grab otherwise the disc will quickly wear away the aluminium (which is also why it is hard to have aluminum brake rotors) Aluminum also is more prone to warping if overheated . The attachment of the friction surface to the aluminium offers another potential point of failure . Extremely light flywheels make the engine run rougher at idle plus makes it easier to "stall " the engine as you release the clutch there is also more acceleration and deceleration between each cylinder firing . The only time it is obvious that the flywheel is very light is when you are sitting at a traffic light blipping the throttle under no load . The two disc clutch small diameter flywheel small diameter pressure plate reduce the weight but you gain an intermediate plate plus the smaller diameter means less energy to accelerate even if it were the same weight ! But it is about 9 pounds lighter . Plus it is bolted to a 55 lb or so crank shaft . The twin disc clutch is better in many respects .

BC

http://www.lmperformance.com/fidanza.asp ... is the website.

They talk about the riveting of the wear material somehwere in there I think.

I forgot about the riming ring change for people - thanks for the clarification Jim.

So maybe I should get a Ti intermediate plate Jim?



Its a good price for people if they wanted to get something. Even if its not much better. As long as its not worse. Its about a little more then half of the price of an 87+ flywheel, as well as the post 84 flywheels.

This is the flywheel I can use. Its actually less then this aluminum one.

But for most people, who need the tooth ring, it could be a bit more.

80-83

or :
85-86

Mark Anderson

Brendan,
You might want to talk to Aasco at (714) 758-8500. They are in Anaheim and they make aluminum flywheels for many aplications plus they have lots of Porsche experience.
http://www.sakatamotorsport.com

BC

Thanks Mark. Looks like they do looms as well for Aftermarket EFI.

I'm happy with your 84 flywheel (and price), but I was thinking I could get some people in on a lighter one and pay about the same price.

What kind of flywheel do you run on your racer?

Fastest928

Good luck with the aluminum flywheel...

Marc
DEVEK