JWT clutch and JWT flywheel CONFIRMED WORKING

t-ray · 06-04-2009, 09:17 AM

Quote:

Originally Posted by Modshack

This happens when you typically lighten a flywheel or go from a Dual Mass type to a solid one... Less damping ultimately resulting in a little more gear rattle. It's generally the transmission, not the clutch..

Why would the transmission be rotating when in neutral? No gear is actively engaged...

I have the jwt flywheel on my g35. I love the responsiveness, but the noise drives me nuts(and I have full exhaust, headers, test pipes, catback), and it completely killed my torque off idle. This is a mod I would not do again.

Modshack · 06-04-2009, 10:06 AM

Quote:

Originally Posted by t-ray

Why would the transmission be rotating when in neutral? No gear is actively engaged...

.

?? There's all kinds of stuff rotating in there. Just because a gear is not selected does not mean there aren't a lot gears engaged and turning. Just not connected to the output shaft. Depress your clutch to stop the spin and the noise goes away.

travisjb · 06-04-2009, 10:52 AM

Quote:

Originally Posted by t-ray

Why would the transmission be rotating when in neutral? No gear is actively engaged...

I have the jwt flywheel on my g35. I love the responsiveness, but the noise drives me nuts(and I have full exhaust, headers, test pipes, catback), and it completely killed my torque off idle. This is a mod I would not do again.

I only have a butt-dyno to go on at this point, but suspect your experience doesn't apply here... I don't feel a torque drop at low end... dyno will tell the full story

Quote:

Originally Posted by Modshack

?? There's all kinds of stuff rotating in there. Just because a gear is not selected does not mean there aren't a lot gears engaged and turning. Just not connected to the output shaft. Depress your clutch to stop the spin and the noise goes away.

Listening to my car supports this statement... press in clutch, very little rattle... release clutch (in neutral), lots of rattle

t-ray · 06-04-2009, 12:50 PM

Quote:

Originally Posted by travisjb

I only have a butt-dyno to go on at this point, but suspect your experience doesn't apply here... I don't feel a torque drop at low end... dyno will tell the full story

A lightweight flywheel won't show up on any dyno. It doesn't make any power. It doesn't "free" any power. And the loss of torque is off idle; not many dynos start that low.

You'll notice it in the summer with the a/c on, starting from a light. You'll also notice it in your 60' if you drag race regularly. There's a reason race cars use lightweight flywheels and dragsters use heavy flywheels.

t-ray · 06-04-2009, 12:48 PM

Quote:

Originally Posted by Modshack

?? There's all kinds of stuff rotating in there. Just because a gear is not selected does not mean there aren't a lot gears engaged and turning. Just not connected to the output shaft. Depress your clutch to stop the spin and the noise goes away.

Sorry, brainfart. I was thinking about the clutch being engaged, not neutral.

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