?'s...MN6 durability with solid flywheel
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,478
Likes: 4
From: Formerly from the Great White North but now residing in the Desert Southwest NM (The Land of Dis-Enchantment?)
?'s...MN6 durability with solid flywheel
If you have a Vette with and MN 6 and you put in a solid flywheel with a sprung clutch and get the tradition can of rocks sound. Is there a durability issue for the transmission?
Melting Slicks
Joined: Dec 2004
Posts: 3,284
Likes: 51
From: Jacksonville, FL
St. Jude Donor '08 thru '26
I always wondered that myself. If I was going to do that change to my zf6spd I would drop an e-mail with Bill at zfdoc.com just to see what his thinking on the question would be.
fwiw, I remember reading somewhere that Ford used a D/M fly wheel in a mustang application(?) and the reason given was to dampen out the vibrations from the motor before they got transmitted to the transmission. I don't know for sure if that is indeed a fact. I never ran it down because I'm not in need of a new flywheel, yet.
I know it's a popular swap in the ZR-1 community. Most of our tuners say it allows for a faster spool up of the revs so we get into our power band quicker. I have never seen a zf 6spd failure linked to the use of a solid fly wheel in any of our technical threads at our forum.
Tom
fwiw, I remember reading somewhere that Ford used a D/M fly wheel in a mustang application(?) and the reason given was to dampen out the vibrations from the motor before they got transmitted to the transmission. I don't know for sure if that is indeed a fact. I never ran it down because I'm not in need of a new flywheel, yet.
I know it's a popular swap in the ZR-1 community. Most of our tuners say it allows for a faster spool up of the revs so we get into our power band quicker. I have never seen a zf 6spd failure linked to the use of a solid fly wheel in any of our technical threads at our forum.
Tom
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,478
Likes: 4
From: Formerly from the Great White North but now residing in the Desert Southwest NM (The Land of Dis-Enchantment?)
any opinions or comments on steel vs aluminum? Any recommendations on flywheel/clutch combinations?
Le Mans Master
Joined: Aug 2005
Posts: 7,392
Likes: 216
From: Merritt Island, FL
I remeber reading that the reason the Dual-mass flywheel was specified for the C4, was because of the feeling that corvette buyers would not want the level of noise/harshness that came from the beefy construction of the ZF6. I don't think it was a durability issue.
Drifting
Joined: Aug 2000
Posts: 1,614
Likes: 0
From: Colleyville Texas
The Spec 3+ is by far the best clutch. Nothing but problems with the Mcleod Kevlar clutches pucks, etc. With my current set up the car idles at 1050RPM's. No issue with noise. Finally broke into the 11's with the 350 going with the SMF.
Melting Slicks
Joined: May 2004
Posts: 2,856
Likes: 187
From: Earth
This summer I went to a SPEC Stage 2+ with alum. flywheel from stock. Def. revs quicker and I'm now breaking the tires loose in 2nd which I wasn't before. (did get other mods done at same time) With about 500 miles on the car the clutch feels stock. Can't wait till spring!!
I called SPEC directly and dealt with them without any problems.
I called SPEC directly and dealt with them without any problems.
Melting Slicks
Joined: Mar 2002
Posts: 3,108
Likes: 126
From: S.L.C. UT
Durability isn't a issue with a solid flywheel. A higher idle and sprung disc helps quiet the gear rattle. And the ZF will handle alot of power. My old motor made 720rwhp and 790rwtq. I haven't dynoed the car the new 450, but it probably makes 50-75 more hp and more tq, and works perfect. The ZF if shifted properly will handle alot of power.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Melting Slicks
Joined: Mar 2002
Posts: 3,108
Likes: 126
From: S.L.C. UT
I probably ought to add that the ZF6 is the only part of my drivetrain that is original and has held the the abuse of hardcore drag racing. Everything before it and behind it has been heavily modifided.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,478
Likes: 4
From: Formerly from the Great White North but now residing in the Desert Southwest NM (The Land of Dis-Enchantment?)
From what I've gathered, outside of the noise issue, there's no issue of accelerated wear or damage from using solid flywheel combinations.
Melting Slicks
Joined: Apr 2007
Posts: 2,616
Likes: 111
SMF are fine.....aluminum FW's just allows you to hear gear rattle due to how the ZF gears are cut.....no problem in durability with the ZF's.....failure rate is quite low(never heard of one actually).....very strong tranny's
Melting Slicks
Joined: Jun 1999
Posts: 2,872
Likes: 3
From: Wilmington NC
I can vouch mine held 900+whp without a grunt with 335 hoosier drag radials out back. I also run a singlemass flywheel with the McLeod Street Twin.
thinking this time around I may try the new Spec supertwin push style clutch system. anyone try this?
Chris
thinking this time around I may try the new Spec supertwin push style clutch system. anyone try this?
Chris
