Clutch Time - Dual Mass or GT3rs/Single Flywheel?
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No worries. If you are going to do the 764pp, make sure you are getting the OEM 4.0 disc if you are pairing this with a LWFW. The 4.0 disc is Porsches latest generation sprung disc and will be much quieter that the previous RS versions or other sprung discs. Most vendors won't package these in their kits as they are slightly more expensive. That's why I say you need to know exactly what is in the kit instead of blindly falling for this dubious 2.5 designation.
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From: Orange County Socal
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Guys,
My car has a Clutchmasters stage 3 twin disc clutch in it now. It is borderline undriveable - especially when hills come into play. Folks with Carrera GT consider it significantly more challenging to drive with the on/off nature. I'm going with Sachs 2.5 but need to pick a flywheel.
1) Dual mass flywheel. Probably the easiest of the options to drive and also quietest. Should also give better shock insulation for crankshaft pulley. Most expensive option by about $1k
2) GT3rs single mass flywheel. $1k cheaper. Less crankshaft pulley insulation. But I do have the prodrive pulley so its on there pretty good. It will be a little harder to drive but with Sachs single disc clutch I'm thinking it will feel orders of magnitude easier to drive than my existing twin disc anyhow.
What do you guys think - should I save the $ and get the GT3rs single mass flywheel? Pro's and con's?
My car has a Clutchmasters stage 3 twin disc clutch in it now. It is borderline undriveable - especially when hills come into play. Folks with Carrera GT consider it significantly more challenging to drive with the on/off nature. I'm going with Sachs 2.5 but need to pick a flywheel.
1) Dual mass flywheel. Probably the easiest of the options to drive and also quietest. Should also give better shock insulation for crankshaft pulley. Most expensive option by about $1k
2) GT3rs single mass flywheel. $1k cheaper. Less crankshaft pulley insulation. But I do have the prodrive pulley so its on there pretty good. It will be a little harder to drive but with Sachs single disc clutch I'm thinking it will feel orders of magnitude easier to drive than my existing twin disc anyhow.
What do you guys think - should I save the $ and get the GT3rs single mass flywheel? Pro's and con's?
Is your clutch stock hydraulic assist? If so, I understand the driveability issue. I had the same clutch with a Aasco LWFW. If you do the GT2 conversion, the clutch modulation is much better. Might want to try that first. It's a much less expensive alternative.
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From: Dallas, TX
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In answer to a few questions.
1) my car has a build engine. About 760whp on full boost and race gas. I run low boost and 93 and it's low 600's whp
2) my car has had crankshaft pulley come loose due to so much power and the backlash of killing power under boost and apparently LWFW not insulating well. I have since upgraded the pulley.
3) yes the clutch is hydraulic assist. Do tell about the GT2 option.
1) my car has a build engine. About 760whp on full boost and race gas. I run low boost and 93 and it's low 600's whp
2) my car has had crankshaft pulley come loose due to so much power and the backlash of killing power under boost and apparently LWFW not insulating well. I have since upgraded the pulley.
3) yes the clutch is hydraulic assist. Do tell about the GT2 option.
Registered User
Joined: Dec 2007
Posts: 1,617
From: Orange County Socal
Rep Power: 159
In answer to a few questions.
1) my car has a build engine. About 760whp on full boost and race gas. I run low boost and 93 and it's low 600's whp
2) my car has had crankshaft pulley come loose due to so much power and the backlash of killing power under boost and apparently LWFW not insulating well. I have since upgraded the pulley.
3) yes the clutch is hydraulic assist. Do tell about the GT2 option.
1) my car has a build engine. About 760whp on full boost and race gas. I run low boost and 93 and it's low 600's whp
2) my car has had crankshaft pulley come loose due to so much power and the backlash of killing power under boost and apparently LWFW not insulating well. I have since upgraded the pulley.
3) yes the clutch is hydraulic assist. Do tell about the GT2 option.
At that kind of engine output, you might want to keep your Clutchmasters stage 3. The GT2 conversion for your clutch gets rid of the hydraulic assist on your clutch pedal. It becomes non assisted like the GT2. The pedal gets much stiffer, but it's much easier to modulate. You can actually feel the engagement point. It's something you should look into whether you decide to change the clutch or not.
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