Kooks header failure....

Discussion in 'Drivetrain, Exhaust and Electrical' started by Mad Hatter, Nov 29, 2018.

  1. Mad Hatter

    Mad Hatter Gotta go Faster

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    What we thought was a header gasket turned out to be a damaged header after running for three hours at our last enduro race. The pointed extractor at the union of the four tubes is somewhere in my muffler! Its a real pain to take out with the modified A arms and Moroso oil pan!!

    upload_2018-11-29_18-28-14.jpeg
     
    Last edited: Nov 29, 2018
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  2. Grant 302

    Grant 302 OPM Spent: $665,833 Moderator

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    Oops!

    Good luck finding the 'cone'.
     
  3. Mad Hatter

    Mad Hatter Gotta go Faster

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    I feel like a kid who had is Ice cream CONE fall on the ground....
     
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  4. Grant 302

    Grant 302 OPM Spent: $665,833 Moderator

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    Nah, you'll feel it's worse when you try to get it. :(

    Maybe now that it's out, you'd consider a higher quality merge in the collector. Like this:
    [​IMG]

    Not that what's there was bad (aside from the weld quality) but there should be improvements in torque if the merge/transition areas are smoothed out/tapered better.
     
  5. Mad Hatter

    Mad Hatter Gotta go Faster

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    Ooooo those are sexy..... where do you get those!!
     
  6. Grant 302

    Grant 302 OPM Spent: $665,833 Moderator

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    Found the example via google. I've only done things like that with local fabricators...way back when I was drag racing. Before products like this were 'off the shelf':

    https://www.verociousmotorsports.co...or-with-Slipover-ID-Inlet-304-Stainless-Steel
    [​IMG]

    And since the coyotes also fire on opposite banks every pulse, you could also consider modifying for a tri-Y like setup if the tubes from opposite pulses are adjacent not cross from each other. I haven't looked up if anyone is doing anything like that for these engines, but I doubt it.
     
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  7. Grant 302

    Grant 302 OPM Spent: $665,833 Moderator

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  8. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    Rut roh. Could have been worse.
     
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  9. 2012-Boss

    2012-Boss TMO Addict

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    Kooks will warranty the header. But, you will have to pay shipping.
     
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  10. Mad Hatter

    Mad Hatter Gotta go Faster

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    Will contact Kooks tomorrow!!!
     
  11. Drlee50

    Drlee50 TMO Race

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    Burns stainless makes some great stuff.

    Sent from my LG-H932 using Tapatalk
     
  12. Mad Hatter

    Mad Hatter Gotta go Faster

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    Kooks responded right away and said it was unusual... They are willing to repair it but living at the end of the world, shipping would cost much more then fixing it down here..... Very tempted with some of the options of collectors... will see over the summer, but in the mean time we have a friendly track day next week, so we will make a quick fix... Its mainly for classic cars.... But being at the track next to a original Testarosso or Aston DB4 is worth the extra work!
     
  13. Grant 302

    Grant 302 OPM Spent: $665,833 Moderator

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    If you were in the states, the choice would be obvious to let them fix it. I don't see the value paying the round trip for something so large. I'd ask if they could provide a replacement shipped to your freight forwarder.

    Otherwise, I think fixing/upgrading/improving the set you have should work well with your recent cam upgrades.
     
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  14. Mad Hatter

    Mad Hatter Gotta go Faster

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    [​IMG]
    [​IMG][​IMG][​IMG]
    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    And back on the car before Kooks gets back to me.. Lol!
     
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  15. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    Niiiiiiiiiiice
     
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  16. Black Boss

    Black Boss TMO Addict

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    Saw the exact same failure mode on Scott S's car at Daytona 3 weeks ago.......
     
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  17. Mad Hatter

    Mad Hatter Gotta go Faster

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    Then I am in good company!
     
  18. Grant 302

    Grant 302 OPM Spent: $665,833 Moderator

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    Did you find the old cone or was that made by your fabricator?
     
  19. Mad Hatter

    Mad Hatter Gotta go Faster

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    That was made by my guy........ We could not find the original in the exhaust, so we like to think it gave my main competitor a flat tire... Not that I wish him ill or anything but he was trying very hard to crash into us in our last enduro....

    He acutally did get a flat tire and later destroyed his gearbox trying to catch up... oil & gears and such all over the track.
     
    Last edited: Dec 21, 2018
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  20. Grant 302

    Grant 302 OPM Spent: $665,833 Moderator

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    lol. I'm surprised it could blow out the muffler unless it's not a chambered design.
     

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