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Team California
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aluminum press. plate question
Sachs now makes two versions of the stock 911 press. plate; steel and aluminum. Aluminum basically gives the lightened-flywheel effect of quicker revving due to less spinning mass. Is this really desirable on a 911? It doesn't have anything to do with actual power output, and I have heard that there is a downside- something to do w/ downshifting in corners or something- does anyone have any real-world experience with this set-up?
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Denis Trump uses an autopen and votes by mail, in case anyone wonders. 
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12-19-2001, 11:01 PM
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Registered
Join Date: Aug 2001
Location: New York, NY, USA
Posts: 128
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I loved the effect in my 914 2.0. Not only quicker revving up, but quicker to deccel also, which is very useful on the track. You can gently shift weight rear to front by just "breathing" the engine with a partial (not full, and not sudden!) lift off the gas, without upsetting the balance of the car the way that tapping the brakes would.
The factory first used them on the 911S, I understand that they also have better heat dissipation ability. |
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12-19-2001, 11:10 PM
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Join Date: Feb 2000
Location: Monroe, Louisiana
Posts: 1,340
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I went through this last year when I replaced my clutch on my 83SC.I went with the aluminum and really cannot tell a difference. I do think that the aluminum has a shorter life span though.
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12-20-2001, 03:49 AM
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Join Date: Oct 2001
Location: Saratoga, NY,USA
Posts: 220
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More massive rotating components do cost hp. Accelerating a heavier flywheel, clutch, pp etc as in reving the engine does cost extra. Check out European car a few months back for some #s on an M3 before /after the lw flywheel conversion. the cars that really benefit are the 993/964 which start out with 50 lb clutch/flywheel packages and can go down to 15 # sets.
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12-20-2001, 04:55 AM
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Join Date: Apr 2001
Location: Bristol, VT USA
Posts: 334
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The downside to a lighter flywheel is less rotating mass. The flywheel doesn't want to keep spinning on it's own for long. Unfortunately the problem is that it is easier to stall. The upside is better throttle response.
I had a lightened flywheel and kevlar ceramic clutch on my rally car. It was great but always either on or off. The clutch disc didn't slip and the flywheel didn't have a lot of mass to buffer that effect. But, it had very crisp throttle response! Cheers.
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Charlie '72 911T |
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12-20-2001, 05:05 AM
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