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Joined: May 2000
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Hard-core CEG\'er
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Hard-core CEG\'er
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Originally posted by Stazi:
It's a light sports car, so it should rev as quickly as possible. Hence I say he SHOULD have a lightened flywheel. The Porsche Carrera GT doesn't even HAVE a flywheel.
The lighter the flywheel the faster it will accelerate. e.g. F1 cars, Champ cars, motorbikes, etc.
That's a given ... I'm speaking with respect to how it impacts shifting. I did however forget just how light the car was until you replied ... good point.
Last edited by fastcougar; 04/06/05 02:08 PM.
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Joined: May 2000
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Hard-core CEG\'er
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Hard-core CEG\'er
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Originally posted by Stazi:
The Porsche Carrera GT doesn't even HAVE a flywheel.
Stupid question ahead....
So how does the [censored] transfer the power to the ground?
-J
'98 4Runner
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Hard-core CEG'er
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Through the clutch via the crank.  It has a special multiplate clutch that is small in diameter to keep the rotational inertia to a minimum, compared to a regular MT which has the clutch bolted to the flywheel, which is bolted to the crank. In the case of the GT, they left out the flywheel. 
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!
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Flaming Biker Dude
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Flaming Biker Dude
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uhm.....I would think twice if I saw that car while on my bike.....omg....cleanup aisle 5......where do I sign up for one :drool
People suck.
Rev it till it MELTS.....
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Hard-core CEG\'er
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Joined: Aug 2001
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CEG\'er
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Ryan
'99 T-Red SVT, KKM, Borla, 1387 of 2760
'92 T-Red F-150 Flareside 4.9, 5 spd
'94 Geo Prizm, it was cheap
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Hard-core CEG\'er
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yep, I was wrong. I just checked the top gear video again. But that "flywheel" is still only the size of a dinner plate. I don't know what I was thinking when I though it was longer.
Ryan
'99 T-Red SVT, KKM, Borla, 1387 of 2760
'92 T-Red F-150 Flareside 4.9, 5 spd
'94 Geo Prizm, it was cheap
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Veteran CEG\'er
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Veteran CEG\'er
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Porsche Ceramic Composite Clutch  I wouldnt mind one of those... either way the Noble and GT are sweet cars nice work man.
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CEG\'er
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OP
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Originally posted by fastcougar:
With that much power/torque, why go with a light flywheel? A heavier flywheel will allow you to maintain more revs between shifts and would drop you into more of the sweet spot than a Fidanza would. Now, with your "foot-to-the-floor" option on the traction control system, this won't really matter, but without it, you will have to blip the gas every time you depress the clutch. Someone correct me if I'm wrong here.
BTW, sweet car ... you are living a great many people's dreams ... thank whatever god it is you believe in that you can afford this project.
I went with a lightened flywheel because it rev's faster, both up and down. I'm more interested in roadracing than dragracing. Between shifts though, you're dropped to the same RPM, despite the 9 lb difference in flywheel weight.
Originally posted by rmcd79:
That doesn't look like the clutch out of a Carrera GT, unless the perspective is real weird. I remember it being like 9 inches across and 11 inches long, extremely small. I could be wrong though.
That is the ZF Sachs Race Engineering ceramic clutch for the Carrera GT. Info here:
http://www.zfsachs.com/direkt.php?link=owx_7_129494_2_6_0_00000000000000.html
There's no standard dual-mass flywheel, but a flywheel ring gear. Sometimes, they call it flywheel-less. The clutch itself is 6.6" in diameter and 7.7 lbs.
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Far right of the clutch setup looks like a flywheel to me ... toothed gearing for starter engagement.