Printable Version of Topic
Click here to view this topic in its original format
914World.com _ 914World Garage _ Lightened flywheels and pressure plates
Posted by: trekkor Dec 31 2004, 10:16 PM
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? 
Important enough to wait for?
If not, then I'll assemble the motor and trans tomorrow with the stock pressure plate.
KT
Posted by: Aaron Cox Dec 31 2004, 10:17 PM
less rotational mass....spool up faster and stall easier 
Posted by: McMark Dec 31 2004, 10:27 PM
It'll rev up like a mo-fo, but if you don't get your revs and clutching right, it's stall city.
Posted by: J P Stein Dec 31 2004, 10:40 PM
| QUOTE (trekkor @ Dec 31 2004, 08:16 PM) |
| : Important enough to wait for? KT |
No.
Posted by: trekkor Dec 31 2004, 10:47 PM
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
I'll move forward.
KT
Posted by: J P Stein Dec 31 2004, 10:57 PM
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 
Posted by: TimT Jan 1 2005, 12:38 AM
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
Attached image(s)
Posted by: TimT Jan 1 2005, 12:41 AM
And this is my lightend flywheel for my 911.... I do have one of those unobtanium pressure plates for myself 
Attached image(s)
Posted by: nein14 Jan 1 2005, 11:04 AM
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.
Posted by: brant Jan 1 2005, 05:24 PM
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
Posted by: carr914 Jan 3 2005, 10:04 AM
How much do those 906 flywheels go for?
Posted by: brant Jan 3 2005, 10:43 AM
| 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
Posted by: trekkor Jan 4 2005, 06:57 PM
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 
Lot's of aluminum...Stiffer springs.
I'll put it on now.
KT
Attached image(s)
Posted by: trekkor Jan 4 2005, 07:32 PM
Done.
Put on a new engine oil thermostat o-ring, too.
KT
Posted by: sixnotfour Jan 5 2005, 12:34 AM
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 ? 
Posted by: trekkor Jan 5 2005, 12:39 AM
Actually, he does... 
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. 
I'm bullnosing his marble for it.
KT
Posted by: nein14 Jan 5 2005, 07:33 AM
Actually, all of the aluminum pressure plates for the early 911S's were cooper faced when new.
Posted by: trekkor Jan 5 2005, 11:20 AM
This one is different. The plate surface is steel ( magnet test ) fused to aluminum. The guy said " plasma welded "
I can't wait to test it.
KT
Posted by: nein14 Jan 5 2005, 11:56 AM
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.
Posted by: C.Plavan May 5 2005, 10:27 PM
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.
Posted by: C.Plavan May 5 2005, 10:49 PM
Here is what happens when you try to race with the copper faced version. This was not from me trying (thank god). But I bought it to resurface it and modify it for the kit. Here are pictures of NOS copper faced (these will be resprayed also) The final version will be like the picture above this post.
Posted by: trekkor May 5 2005, 10:52 PM
The pressure plate you show look just like mine.
My motor does rev up rather nice BTW, 
KT
Posted by: dlo914 May 5 2005, 10:55 PM
im surprised scott (skline) hasnt buzzed in about his first 914's 1.7L w/ a lightened 12lb flywheel.....
Posted by: C.Plavan Jun 15 2005, 01:01 PM
Anyone have interest in a full lightweight kit? This would include an aluminum flywheel, Custom clutch disc, and a modified/ repsprayed Aluminum pressure plate (VERY RARE PART) The kit will look like the picture I posted in this thread.
Kit would be in the $1200 range ready to be bolt on.
I only have 2 (out of 5) left. There will be some lead time to modify the aluminum pressure plates.
Send PM. Very trick parts.
Posted by: SirAndy Jun 15 2005, 02:21 PM
| QUOTE (trekkor @ Dec 31 2004, 09:16 PM) |
| What are the advantages to using these components |
IMHO, the biggest plus of a lightened flywheel is the much quicker deceleration, you can actually use the gaspedal as a brake and steering wheel ...
Andy
Powered by Invision Power Board (http://www.invisionboard.com)
© Invision Power Services (http://www.invisionpower.com)