[TROD]

a few weeks ago i posted about my new mantic triple disc clutch failing in less than a month. of coarse mantic and the speed shop claims they didnt do anything wrong. in my defense, i have had this hellcat for 2 1/2 years and had 780 rwhp after first upgrades. (pulley,injectors,headers,hp tunes). with that set up i drove it for a year on a stock clutch and tore it up after properly breaking it in and had absolutely no problems. been driving a manual for most of my life. im 47. they are acting like i burned it up. no i didnt. so......i had a whipple, twin 550 fuel pumps, E85 and the triple disc installed. they also installed 3 tunes. 93 octane, E70 and E85. the car was dyno'd for these tunes and im assuming at LEAST a minimum of 6-8 dyno runs to get all the tunes dialed in. all tunes were done in ONE day. with the result being 1006rwhp on E85. AND ALL DONE WITHOUT ANY STREET DRIVING FOR A BREAK IN. maybe a quick around the block but not the 500 miles mantic suggests for proper break in. they said they did heat cycles. what is your opinion that with that many dynos on a brand new clutch with 1006rwhp all in one day that they smoked the clutch from the start? also, if you look at flywheel u can see where the springs have dug into the aluminum. need opinions and advice and thank you for any info. clutch guys what do yu think happen???? View attachment 576727 View attachment 576728 View attachment 576729 View attachment 576728 View attachment 576727 View attachment 576727 View attachment 576728

 

[102542]

anything can be tore up--just ask any NASCAR owner--many drivers are fired for abuse of equipment--there's no such thing as a bullet proof clutch..

good luck!

 

[TROD]

yeah if u tear it up. drove it normal for 2 weeks. did 2 roll races and zero burnouts. if thats tearing it up its news to me.

 

[Himmelkat]

Sounds like they are passing the buck and avoiding responsibility. I remember companies that do that and don't buy from them.

I don't need little children in charge of a critical part of my car.

BTW all the pics have been removed from the site. I can't see anything.

 

[TROD]

Sounds like they are passing the buck and avoiding responsibility. I remember companies that do that and don't buy from them.

I don't need little children in charge of a critical part of my car.

BTW all the pics have been removed from the site. I can't see anything.

why were they removed? i need people to see them o they can give advice on what they think happened

 

[TROD]

 

[TROD]

why were they removed? i need people to see them o they can give advice on what they think happened

i just posted them again

 

[TROD]

Sounds like they are passing the buck and avoiding responsibility. I remember companies that do that and don't buy from them.

I don't need little children in charge of a critical part of my car.

BTW all the pics have been removed from the site. I can't see anything.

 

[Himmelkat]

You know, I was suspicious of the quality of loose standoffs floating the pressure plate way above the flywheel, mounted in single shear.

Clutch and Manual Transmission information research

The less torque your car has at low RPM and the heavier the car, the more it will need a heavy flywheel/clutch assembly to get launched without overuse of the START button. The Hellcat has mounds of torque, so it is easy to launch with the stock clutch, or the units that add mass, such as the...

www.hellcat.org

Suspicions confirmed, evidently.
Are two of those studs/bolts through the standoffs sheared off?
Also, one of the studs seems bent, when viewed down at it, but not sure if that is camera angle.

 

[TROD]

Yes it is bent. So if you dont mind it seems like you know alot. Does it seem like it was burned up during the dyno pulls for the three tunes in one day without proper break in. They are not wanting to reimburse me and I want a good arguement but I dont know clutches

 

[TROD]

I would really appreciate any info

 

[Himmelkat]

What is not clear to me is how a clutch could BEND the standoff bolts.
I don't think a clutch sitting static, just holding a load, should be undergoing much in the way of stress.
However, they do want a break-in time to get the disks and friction material properly bedded in to each other. If it is valid that they do not achieve peak holding power/friction without proper break-in, that could have caused the failure, because without a good mating set of surfaces, friction would not be as high as wanted, and it could slip, then slip some more, ovrheat, and slip some more, in a positive feedback loop that would end up with ruined friction interface as you see there.

I don't know the compounds and materials enough to know if they were glazed from lack of break-in, didn't get past their shipping/processing surface/oil/whatever, etc. I know that ceramic friction material can glaze over if improperly used (as in, not broken in, not used aggressively enough to start.)

I am now really not going to buy a Mantic. I don't like the single-shear LONG bolts holding the pressure plate WAY up off the flywheel, and their response to you, also. It looks to me like something failed, which caused a cascading effect which really twisted/bent over the standoffs. The dents in the flywheel by the standoff positions indicate that those standoffs REALLY got torqued over, something that just cannot happen with the designs that bolt the flywheel directly to the pressure plate with no standoffs at all.

The bent stud and sheared-off-looking other studs indicate a pretty catastrophic failure. Good thing the clutch didn't Garlits your foot.

 

[TROD]

Thank u sir for all the info. I really appreciate it. Ill let u know what they decide to do.

 

[Himmelkat]

Welcome, you are.