L98 flywheel questions
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1st Gear
Joined: Sep 2006
Posts: 1
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L98 flywheel questions
I have a 1989 Corvette -- 6 speed manual, Z51. I just rebuilt the engine and want to put a better flywheel on it. The dual mass flywheel is making noises sometimes and it is just plain too heavy. My machinist suggested a 16 lb. steel flywheel from Speedway motors, which I got. We included a clutch kit (push instead of pull) and now I'm putting it back together. I got a TO bearing that is internal to the bell housing, but it won't fit because it doesn't give me any clearance to the clutch release fingers. It seemed like such a great solution, but.....
What have others done to put a non-dual mass flywheel on their car and how do people suggest I solve this problem? Thanks for the help.
regards,
barry
What have others done to put a non-dual mass flywheel on their car and how do people suggest I solve this problem? Thanks for the help.
regards,
barry
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
There are thousands of threads on DMF, SMF, experiences, comments, bitches, swaps and few people sawped back.
I installed a new DFM, new TB, new clutch and press. plate, and the second I started the Vette and it made and makes noise.
If you install a SMF, your tranny will make a rattle noise. It sounds like something loose but is not. It was explained to me it is the firing order gap that makes the gears go back-and-forward in a millionth of a second.
Here is a video I like to show people with this question. The ZF was designed to use a DMF.
If yours was like this; It is gone
I installed a new DFM, new TB, new clutch and press. plate, and the second I started the Vette and it made and makes noise.
If you install a SMF, your tranny will make a rattle noise. It sounds like something loose but is not. It was explained to me it is the firing order gap that makes the gears go back-and-forward in a millionth of a second.
Here is a video I like to show people with this question. The ZF was designed to use a DMF.
If yours was like this; It is gone
Last edited by PLRX; Aug 27, 2011 at 02:48 PM.
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Yep, dont forget these were people with experience, PhDs, etc.
Meeting at the GM CEO
-Sir, we have to go back into designing a new distributor, flywheel or tranny, stronger plastic, we would like to make the C4 a bit wider and with more space in the engine bay"
-Why
-Sir, the Opti failed, the DMF makes noise out of the box, the plastic cant handle its own weight and we barely fit a woman's hand to change spark plugs.
-Screw this, we have to go into production and lets call it The Best Vette Yet. Call Joe at Motor Trend and give him a paid vacation to Aruba.
Meeting at the GM CEO
-Sir, we have to go back into designing a new distributor, flywheel or tranny, stronger plastic, we would like to make the C4 a bit wider and with more space in the engine bay"
-Why
-Sir, the Opti failed, the DMF makes noise out of the box, the plastic cant handle its own weight and we barely fit a woman's hand to change spark plugs.
-Screw this, we have to go into production and lets call it The Best Vette Yet. Call Joe at Motor Trend and give him a paid vacation to Aruba.
Melting Slicks
Joined: Mar 2003
Posts: 2,512
Likes: 49
From: Franklin IN
Yep, dont forget these were people with experience, PhDs, etc.
Meeting at the GM CEO
-Sir, we have to go back into designing a new distributor, flywheel or tranny, stronger plastic, we would like to make the C4 a bit wider and with more space in the engine bay"
-Why
-Sir, the Opti failed, the DMF makes noise out of the box, the plastic cant handle its own weight and we barely fit a woman's hand to change spark plugs.
-Screw this, we have to go into production and lets call it The Best Vette Yet. Call Joe at Motor Trend and give him a paid vacation to Aruba.
Meeting at the GM CEO
-Sir, we have to go back into designing a new distributor, flywheel or tranny, stronger plastic, we would like to make the C4 a bit wider and with more space in the engine bay"
-Why
-Sir, the Opti failed, the DMF makes noise out of the box, the plastic cant handle its own weight and we barely fit a woman's hand to change spark plugs.
-Screw this, we have to go into production and lets call it The Best Vette Yet. Call Joe at Motor Trend and give him a paid vacation to Aruba.
