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Exploding flywheel

Posted by AuSpec Vr4, Jan 20, 2014

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  1. AuSpec Vr4

    AuSpec Vr4 Probationary Member

    11
    0
    Joined Feb 25, 2011
    Brisbane, Australia
    Hey guys, please tell me this happens to other people...

    I don't know how many of you know about my vr4 and its progress but it has been off the road for a year getting much needed upgrades to turbo/intake side of things. Yesterday was my first time driving the car in over a year, fresh rego and all was going well. At 12am in the morning when heading home from work i wanted to see what the power was like after fitting a new exhaust with 3 mufflers in it to make it road worthy, from 2nd gear 2000rpm i was WOT till 7,000rpm just about to change to 3rd and the pictures explain what happened next. Years of work have gone into this car and had only been registered less then 12 hours ago. The flywheel exploded instantly killing the car, the flywheel separated into three chunks, 1 almost going threw the radiator but also taking out the water pipe/turbo/turbo feed/radiator hose/intake/radiator fan/condenser and has bent the whole front of the radiator support panel forward, bent the lower cross member and the gearbox bell housing was scattered for hundreds of meters down the road along with coolant and oil. bolts snapped in the block, starter motor output shaft snapped from its housing, cut the steel clutch slave line and found the slave on the road. i can't describe how much of a mess it has made and the noise was horrendous. I am speechless, i thought i was at fault with something i had done but i would never expect a flywheel to give way like that. the 6 bolts are still holding whats left of the flywheel on along with the clutch, i hope for my sake the engine is still fine.


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  2. StarFawkes

    StarFawkes Proven Member

    326
    2
    Joined Mar 27, 2012
    Wahiawa, Hawaii
    That is so extreme. I don't even know what to say.
     

    928  0

    1990 Mitsubishi Eclipse GSX
    manual · 1G DSM
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  3. phr0st

    phr0st Proven Member

    183
    6
    Joined May 4, 2005
    New Orleans, Louisiana
    Had the same thing happen to me in my old n/t. Flywheel overheated from an improperly adjusted clutch and came apart. I probably see this at least once every other trip to the track and it's the reason scatter shields are required for high powered cars.
     

    Drag Race Build 885  2

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM
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  4. AuSpec Vr4

    AuSpec Vr4 Probationary Member

    11
    0
    Joined Feb 25, 2011
    Brisbane, Australia
    Yes I will be getting a scatter shield for my own safety this time, I wanted to make big hp but this was on 8 psi boost.
     
  5. motomattx

    motomattx Proven Member

    3,273
    1,177
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Full coverage claim!
     

    Drag Race Build 4K  10  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  6. beyond-redline

    beyond-redline Proven Member

    12
    0
    Joined Oct 31, 2002
    ,
    We had a dirt track non turbo car on our dyno last year and the same thing happened! I think it made about 146 whp. It was like a bomb went off in our shop with shrapnel flying everywhere. Destroyed the engine, transmission, radiator, etc. Unbelievably fortunate no one was injured.
     
  7. FalleN4ng31

    FalleN4ng31 Proven Member

    252
    12
    Joined Sep 12, 2007
    Clearwater, Florida
    Oh wow. That's a kick in the shorts, man. But, you're very fortunate it didn't grenade and throw shrap into the passenger cabin. Cars and engines can be replaced, life and limbs not so much.
     

    1K  0

    1998 Mitsubishi Eclipse GST
    manual · 2G DSM
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  8. AuSpec Vr4

    AuSpec Vr4 Probationary Member

    11
    0
    Joined Feb 25, 2011
    Brisbane, Australia
    Yea seeing how much force it had i'm lucky im still alive. Its just a lesson to use new flywheels and not machined ones. Im desperate for gvr4 front cross member/support and engine mount, if anyone in US has one who is willing to post to aus let me know.

    Thanks, Brock
     
  9. luisgil

    luisgil Proven Member

    154
    1
    Joined Jan 10, 2013
    Paterson, New Jersey
    Woah, that left me speechless....
     

    430  1

    Evo 1 “GSR”
    awd · manual · Lancer Evolution
    luisgil

    Drag Race Build 1K  0

    1991 Mitsubishi Eclipse GSX
    manual · 2G DSM
    Loading...
  10. renovatdkitchen

    renovatdkitchen Proven Member

    623
    31
    Joined Sep 25, 2011
    Toronto, ON, Canada
    Wow. Thats nuts! Glad that you are okay though.

    Looks my flywheels are going to be replaced more frequently than I thought, just for the safety factor.

    Curious though, I notice that the pressure plate is red, which is what XTD (eBay) uses as their colour. What brand clutch and flywheel did it have on, if you know?
     

    Street Build 1K  14

    1999 Mitsubishi Eclipse Spyder GST
    10.619 @ 126.56 · 2G DSM

    Street Build 5K  15

    1998 Mitsubishi Eclipse Spyder GST
    11.568 @ 123.87 · 2G DSM

    Street Build 2K  5

    1992 Eagle Talon TSi AWD
    12.790 @ 105.14 · 1G DSM
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  11. 91-GS

    91-GS Proven Member

    1,390
    62
    Joined Jan 12, 2013
    Paris, Tennessee
    Would an aluminum flywheel fail like that too?

    To AuSpec Vr4: glad you did not get hurt. Looks like one of those chunks could have easily gone through the firewall.
     

    1K  0

    1991 Mitsubishi Eclipse N/T
    000.0 whp · 000.0 lb/ft · 1G DSM
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  12. Breezio69

    Breezio69 Proven Member

    1,109
    17
    Joined Mar 5, 2012
    SLC, Utah
    Holy shnikes... that's absolutely crazy.
     

    Street Build 1K  0

    1995 Mitsubishi Eclipse GST
    manual · 2G DSM
    Loading...
  13. motomattx

    motomattx Proven Member

    3,273
    1,177
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Makes you not want to stand in front of the dyno at the shootout.
     

    Drag Race Build 4K  10  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  14. danielsl1999gsx

    danielsl1999gsx Proven Member

    848
    90
    Joined Jun 5, 2009
    los angles, California
    Sweet Lord Jesus this is amazing! Glad you made it out ok, +1 for new material with big power.
     
  15. AuSpec Vr4

    AuSpec Vr4 Probationary Member

    11
    0
    Joined Feb 25, 2011
    Brisbane, Australia
    Yea XTD clutch and pressure plate, but learn from my mistake or unfortunate break down, get a new flywheel of decent quality! Thanks guys.
     
  16. HIGHPSI4

    HIGHPSI4 Proven Member

    809
    9
    Joined May 11, 2003
    Vale, North Carolina
    Did it go through the hood? I have also seen pieces almost make it through the fire wall. I have seen 4 or 5 and I usually have to weld the ears back on the block.
     

    1K  0

    1990 Eagle Talon TSi AWD
    manual · 1G DSM
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  17. AuSpec Vr4

    AuSpec Vr4 Probationary Member

    11
    0
    Joined Feb 25, 2011
    Brisbane, Australia
    Didn't touch the hood, and broke one of the ears on the engine block,
    Below water pipe.
     
  18. miliman13

    miliman13 Proven Member

    1,957
    274
    Joined Jan 1, 2011
    tampa, Florida
    With a stock flywheel, that had been re-surfaced ?
    by the way thanks for posting,
     

    3K  0

    1998 Mitsubishi Eclipse GSX
    manual · 2G DSM

    2K  0

    1998 Mitsubishi Eclipse GSX
    13.066 @ 106.880 · 2G DSM
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  19. GRAVEDIGGER

    GRAVEDIGGER Proven Member

    3,620
    102
    Joined Nov 26, 2007
    Uniontown, Ohio

    A quality aluminum flywheel like this Fidanza Aluminum Flywheels is a lot stronger than an old stock, or resurfaced stock flywheel will ever be. ;)
     

    2K  18

    1991 Eagle Talon TSi AWD
    12.149 @ 115.940 · 1G DSM
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  20. GRNDSM

    GRNDSM Moderator

    2,382
    100
    Joined May 16, 2002
    Chelmsford, Massachusetts
    The same thing happened to Bruce Kwartler's Galant back in '01 or '02... as in, 10+ years ago!

    https://www.facebook.com/video/video.php?v=410151285707734

    (he did hit the wall with his rear bumper... but not very hard)

    He was "only" running mid to low 12's at the time. So he was NOT required to have a scatter shield by the NHRA/IHRA rules! BTW, I was supposed to drive the car on THAT pass...

    I am sorry if I sound rude, but it is time for some tough love... Anyone who is racing on a cast OEM flywheel is ASKING FOR THIS to happen!!! This is common knowledge! Yet people overlook this all the time!

    This is completely unnecessary! You can pick up used ACT or Fidenza FW for under $100! Last time I had a Fidenza FW (in great condition) for sale, it took me forever to sell it for just $60!!!
     
    Last edited by a moderator: Jun 5, 2014

    Street Build 3K  10

    93 Eagle Summit AWD
    11.567 @ 122.77 · 4G63t Swapped

    2K  0

    1994 Eagle Talon TSi AWD
    10.123 @ 138.060 · 1G DSM
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  21. MQTalon92

    MQTalon92 Proven Member

    46
    1
    Joined Aug 3, 2006
    Plainfield, Illinois
    You are right. The word needs to get out to everybody about using stock flywheels on modified cars. They can be life threatening when they come apart. The flywheel may look like it is in great shape but remember these 6 bolt flywheels have been around for 20 years. Most have been abused. Don't trust a 20 year old flywheel with your life. It's not worth it.
     
  22. GRNDSM

    GRNDSM Moderator

    2,382
    100
    Joined May 16, 2002
    Chelmsford, Massachusetts
    Bruce's FW was only 10 years old at the time! Now, 10+ years later, is it even MORE "unwise" to use these whyheels, on anything that revs pass 6000 rpms!
     

    Street Build 3K  10

    93 Eagle Summit AWD
    11.567 @ 122.77 · 4G63t Swapped

    2K  0

    1994 Eagle Talon TSi AWD
    10.123 @ 138.060 · 1G DSM
    Loading...
  23. crash89

    crash89 Proven Member

    3,533
    159
    Joined Mar 5, 2008
    Janesville, Wisconsin
    OP, this really sucks to see, glad nobody was hurt!!

    However, I think this was just a freak accident. If one flywheel comes apart out of thousands in many years of use than thats just shitty luck. Id say these flywheels are pretty good quality. Im using a stock flywheel and it doesnt bother me. Now, if a bunch of cars from the same manufacturer kept having flywheels come apart in the first couple years of production I would most definitely be worried about this happening.
     

    5K  4

    1999 Mitsubishi Eclipse Spyder GST
    awd · manual · 2G DSM

    4K  10

    1999 Mitsubishi Eclipse Spyder GST
    11.043 @ 125.92 · 2G DSM
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  24. GRNDSM

    GRNDSM Moderator

    2,382
    100
    Joined May 16, 2002
    Chelmsford, Massachusetts
    I think that it is a bit more common than you think... There have been many guys, over the years, who had it happen to them. Bruce's incident really hits close to home because he is a friend and it was supposed to be ME in that car on that run!

    One of the reasons why you do not see more of this, is because people ARE getting the message and using aftermarket FW's! Most guys in New England DSM are using those, of course, we are more aware of this problem since it happen to one of "our own" at our home track.

    Tym Swytzer also had his explosion on tape around '98/'99.

    If you ever have a chance to closely inspect a stock used FW, BEFORE it is machined, you can actually see the cracks on many of them! NEVER use a stock FW with such cracks, which means that you shouldn't buy a used FW after it was machined because machining can hide cracking!
     
    Last edited by a moderator: Jun 5, 2014

    Street Build 3K  10

    93 Eagle Summit AWD
    11.567 @ 122.77 · 4G63t Swapped

    2K  0

    1994 Eagle Talon TSi AWD
    10.123 @ 138.060 · 1G DSM
    Loading...
  25. AuSpec Vr4

    AuSpec Vr4 Probationary Member

    11
    0
    Joined Feb 25, 2011
    Brisbane, Australia
    The flywheel i had was the original and was inspected for cracks while out then machined, we did not notice or think anything about it 4 years ago because it looked fine and it has lasted this long but it must of worn down quick because when inspecting the flywheel now... there is small hairline cracks everywhere. But yes, for the $200 max you should spend on a new flywheel, you should get one.
     

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