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> Lightened flywheels and pressure plates, What are the benefits?
Trekkor
post Dec 31 2004, 10:16 PM
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My flywheel on the SIX appears to be lightened and balanced.

I'm waiting for someone to find a lightened press plate for me as well.

What are the advantages to using these components.
Faster revving? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)

Important enough to wait for?
If not, then I'll assemble the motor and trans tomorrow with the stock pressure plate.

KT
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Aaron Cox
post Dec 31 2004, 10:17 PM
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less rotational mass....spool up faster and stall easier (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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McMark
post Dec 31 2004, 10:27 PM
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(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) It'll rev up like a mo-fo, but if you don't get your revs and clutching right, it's stall city.
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J P Stein
post Dec 31 2004, 10:40 PM
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QUOTE (trekkor @ Dec 31 2004, 08:16 PM)
:

Important enough to wait for?

KT

No.
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Trekkor
post Dec 31 2004, 10:47 PM
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This guy has been teasing me with a "race" pressure plate, lightened, balanced, high pressure for three to four weeks.

But he can't find it (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)

I'll move forward.

KT
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J P Stein
post Dec 31 2004, 10:57 PM
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The only "reasonably priced" light weight PP that I'm aware of
is the early 9eleben Aluminum jobbie.....if $900 (last I priced them) bucks is reasonable. A Tilton set-up is mega bucks.

Besides, with a low torque engine, you want a fairly heavy flywheel.....the better to launch you with (IMO)......& chirp 2nd (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
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TimT
post Jan 1 2005, 12:38 AM
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What clutch/flywheel are you using?

A lightened flywheel/pressure plate will spool up quicker, will decelerate more quickly.

You can upshift, downshift faster

If you have a disk type flywheel you may be able to get a 915 RSR pressure plate. ie all aluminum, they are getting hard to find new though..

One thing we do with cars with EFI and light flywheels etc is to advance the timing at idle to give the engine more torque/power at idle.. less driveabilty probs

here is a 906 flywheel


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TimT
post Jan 1 2005, 12:41 AM
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And this is my lightend flywheel for my 911.... I do have one of those unobtanium pressure plates for myself (IMG:http://www.914world.com/bbs2/html/emoticons/flipa.gif)


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nein14
post Jan 1 2005, 11:04 AM
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Watch on Ebay, about a year ago I got NOS Sachs 6 spring 911S Clutch & Aluminum Pressure and throwout bearing for just under $400.00. Haven't installed it in the Turbo yet, still using the stock clutch.
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brant
post Jan 1 2005, 05:24 PM
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on the early 911-alloy PP, you need the correct clutch disc too...

We once had the wrong one and couldn't figure out why our clearances didn't work....

brant
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carr914
post Jan 3 2005, 10:04 AM
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How much do those 906 flywheels go for?
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brant
post Jan 3 2005, 10:43 AM
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QUOTE (carr914 @ Jan 3 2005, 09:04 AM)
How much do those 906 flywheels go for?

I've never seen a real one...
I'd think a real one would be really expensive..

much cheaper to get your flywheel lightened... even extensively lightened.

brant
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Trekkor
post Jan 4 2005, 06:57 PM
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My parts guy came through today.

The part looks identical to the stock one.

The new one wieghs in at 6#'s while the old one is a whopping 10#'s (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)

Lot's of aluminum...Stiffer springs.

I'll put it on now.

KT


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Trekkor
post Jan 4 2005, 07:32 PM
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Done.

Put on a new engine oil thermostat o-ring, too.


KT
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sixnotfour
post Jan 5 2005, 12:34 AM
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Dude , you scored , I have one in my 6 also. they're great.
The copper faced ones are the problem childs. You got the good one. Does He have anymore ? (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif)
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Trekkor
post Jan 5 2005, 12:39 AM
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Actually, he does... (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)

He's planning on putting a SIX in his Lotus Europa with a 901 gearbox.

He showed me the part about three-four weeks ago and said I could have it.

Then he said he'd have to find the "other one" as this was for his project.

I waited and he found it. (IMG:http://www.914world.com/bbs2/html/emoticons/clap.gif)

I'm bullnosing his marble for it.

KT
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nein14
post Jan 5 2005, 07:33 AM
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Actually, all of the aluminum pressure plates for the early 911S's were cooper faced when new.
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Trekkor
post Jan 5 2005, 11:20 AM
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This one is different. The plate surface is steel ( magnet test ) fused to aluminum. The guy said " plasma welded " (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)

I can't wait to test it.

KT
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nein14
post Jan 5 2005, 11:56 AM
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Sachs never made one like that, I ran into the same problem with a used one I bought from a Porsche dismantler. I ended up calling Sachs direct to get verification from their part # on the pressure plate.
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C.Plavan
post May 5 2005, 10:27 PM
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I'm bringing this thread back to life. I have 3 now and possibly 5 of the "Unobtainum" aluminum pressure plates. I am working on version 2.0 for the higher HP/torque cars. I will be testing this V2.0 version next weekend.
FYI- there are two versions of the aluminum pressure plate. The copper faced (actually bronze) will not hold up to race conditions.... it will gall and flake. The second version is gray sprayed on metal. This is what you really want.
I will have a complete kit available shortly. It will include a modified aluminum pressure plate, custom lightweight clutch disc, and custom aluminum flywheel. It will be much cheaper than the $2200-$2500 Tilton package.
Here are some pictures. This package will save you at least 10 pounds spinning on your crank....Zoom..ZOOM. My race car was flying through the gears.
(IMG:http://www.plavanracing.com/Plavanracingver1.JPG)
(IMG:http://www.plavanracing.com/Plavanracingv1.01.JPG)
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