• Mustang Forums
  • 2005 - 2014 S-197 Mustang -General/Talk-
  • 2005 - 2009 Specific Tech

Aftermarket clutch with stock flywheel dangerous (shatter?)

  • Thread starter Thread starter bsmoke
  • Start date Start date Sep 15, 2010
B

bsmoke

New Member
Sep 14, 2010
4
0
0
Sep 15, 2010
#1
  • Sep 15, 2010
  • #1
Have you heard of stock flywheels shattering when used with an aftermarket clutch?

I heard some things about this and called Exedy.
They told me no if you just daily drove it but that stock flywheels are'nt made for aftermarket clutches when it comes to racing and that if you race your car you can shatter it under high RPMs if you use an aftermarket clutch.

So what about the person who races their car once a month or something on a road race like me?

Someone that does not track the car?

Don't get me wrong... sometimes I do get on the car. When I have fun I get her to about 6.3k RPMs.
There's no way I can really measure how many times in a month I decide just to take my car to high RPM's though when I am just alone to feel my car run and enjoy it.
Maybe I go a month without it... maybe I go a week and do it 5 times

I was really worrying and did not want to use the lightweight STEEL flywheel that Exedy offered because it was as light as aluminum.
It is the ONLY one they offer with the Exedy Mach 400 Clutch I ordered though.

They told me not to use other companies flywheels other than stock because the dimensions are often different and cause chatter,noise, and fitment issues.

So the choice is stock flywheel or aluminum feel with a daily driver.

Is it a BAD idea to use a stock flywheel with an aftermarket clutch if you do ANYTHING but daily drive?
Are you going to shatter your flywheel?

But on the other side...I heard an aluminum flywheel is harder on the engine for
everyday driving if a person relies on the engine to slow down (I.E.) coasting...
rather than using the break because of the flywheel moving faster because of it's light weight.
I have heard this can lead to a much shorter engine life if you do not use the break to slow down
instead of letting the car slow down on it's own.
I actually prefer to coast rather than just BREAK.
If anything out of traffic safety.
Truth to this part of the thread?

Anyways...
Aftermarket clutches and Stock flywheels
for us that do more than just daily drive....
Opinions, experiences?

And... if you had to make my choice between the stock flywheel risk of shatter, or the everyday wear
on the engine of the light weight flywheel.. which would it be and why?

BTW I am running 312RWHP 308 trq will see 400 max on the car someday if ever.
(clutch is Exedy Mach 400)
 
B

bsmoke

New Member
Sep 14, 2010
4
0
0
Sep 16, 2010
#2
  • Sep 16, 2010
  • #2
Really? No input at all?
 
You must log in or register to reply here.

Similar threads

A
Need some info on putting a 2002 4.6l in a 1997 gt.
  • Austin4.6l
  • May 29, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
147
1996 - 2004 SN95 Mustang -General/Talk- May 29, 2025
Austin4.6l
A
D
96 get convertible-sell or part out?
  • DTCstang
  • May 17, 2026
  • What is it Worth?!?!?
Replies
5
Views
161
What is it Worth?!?!? May 18, 2026
nickyb
S
Need a clutch, 1982 Capri RS 5.0 owner, am I allowed to participate?
  • scudzuki
  • Apr 4, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
9
Views
572
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 7, 2025
Noobz347
6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
979
1965 - 1973 Classic Mustangs -General/Talk- Jun 20, 2026
gray owl
G
Engine Suggestions on an engine rebuild. Stock cam/GT40Ps or aftermarket on both for a fun weekend driver?
  • MadSquirrelTech
  • Apr 28, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
23
Views
864
Fox 5.0 Mustang Tech May 7, 2026
MadSquirrelTech
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 2005 - 2014 S-197 Mustang -General/Talk-
  • 2005 - 2009 Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?