ZR-1 Net Registry Forums

ZR-1 Net Registry Forums (http://zr1.net/forum/index.php)
-   C4 ZR-1 Technical Postings (http://zr1.net/forum/forumdisplay.php?f=9)
-   -   Single Mass FW ID (http://zr1.net/forum/showthread.php?t=24487)

BigIke 01-01-2015 02:19 AM

Single Mass FW ID
 
My car revs quick, but i don't know how much quicker than any other LT5... When I start off with very little throttle, maybe too little sometimes, there is a rattle for the tranny/engine area?

Can anyone describe the noise that is associated with the single mass FW?

Thanks!

XfireZ51 01-01-2015 09:12 AM

Re: Single Mass FW ID
 
The FW makes no noise. The noise is from the Trans which is a bit like rocks in a can. The Dual Mass absorbs the engine vibration.

BigIke 01-01-2015 01:23 PM

Re: Single Mass FW ID
 
Yeah, thats what i was thinking, i think i have a Single Mass in mine.

Thanks

USAZR1 01-01-2015 07:53 PM

Re: Single Mass FW ID
 
Quote:

Originally Posted by BigIke (Post 218003)
When I start off with very little throttle, maybe too little sometimes, there is a rattle for the tranny/engine area?
Thanks!

Under those conditions,a ZR-1 with dual mass flywheel will make the same noises.

XfireZ51 01-01-2015 09:01 PM

Re: Single Mass FW ID
 
My Fidanza will cause a tranny rattle at idle, in neutral and clutch disengaged. Otherwise, it doesn't rattle. And the amount of rattle depends usually on how hot the trans oil is.

Hib Halverson 01-02-2015 01:48 AM

Re: Single Mass FW ID
 
Quote:

Originally Posted by XfireZ51 (Post 218005)
The FW makes no noise. The noise is from the Trans which is a bit like rocks in a can. The Dual Mass absorbs the engine vibration.

A dual mass flywheel does not "absorb" engine vibration. The engine mounts and the car's structure do that.

The dual mass wheel damps gear rattle from the transmission.

At idle and low rpm the engine speed fluctuation caused by four firing impulses per revolution (engine speed increases as the engine accelerates during a power stroke then decreases as the engine slows down on a compression stroke) causes the teeth of the gears on the transmission main shaft to vibrate or rattle in the teeth of the gears on the countershaft

The dual mass wheel, partially damps the effect of this speed fluctuation by setting up a secondary fluctuation out of phase with the primary. The result is a reduction in gear rattle.

BigIke 01-02-2015 01:44 PM

Re: Single Mass FW ID
 
Mine is loud... I'm a little embarrassed when pulling out of the local meet...

XfireZ51 01-02-2015 04:36 PM

Re: Single Mass FW ID
 
Quote:

Originally Posted by BigIke (Post 218075)
Mine is loud... I'm a little embarrassed when pulling out of the local meet...

Is this in neutral? Clutch disengaged? Accelerating?

BigIke 01-02-2015 04:53 PM

Re: Single Mass FW ID
 
No noise in Neutral, maybe a little throwout bearing noise.... No noise acceleration except from a dead stop with light throttle. Not nearly so light a throttle that the car bucks or anything like that just a normal light throttle take off.

XfireZ51 01-02-2015 05:56 PM

Re: Single Mass FW ID
 
Mine only rattles in Neutral w clutch engaged. The noise level is also dependent on how hot trans oil is, as in after a long run on a hot day. Again, playing w the tune evens out the engine pulse helping to minimize the rattling. Same as what happened with the ZF-6 in my 84 Xfire.


All times are GMT -4. The time now is 09:04 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright ZR-1 Net Registry 2025