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RXT + 800-1k hp = No good.

Discussion in 'Driveline' started by gabe1530, Jan 3, 2016.

  1. gabe1530

    gabe1530 Banned

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    Here are pics of the damage. I ran this clutch with my old 2.9 setup (625ish) for a short time (1-2k miles) and now with the new engine making 800+ and on c85 making 1k. My Cobra stays at the low boost setting of 13lbs ~800+ hp.
    I have come to the conclusion that the rxt isnt strong enough for my application. I do understand that the rxt can be rebuilt but its not worth it when this will happen again.
    I think i will go with a SPEC P-Trim next or the Centerforce DYAD. I am still open to options on different clutches.
    My trans is a t56 with d&d 26 spline and upgraded throw out bearing sleeve. I will have to upgrade the t56 and am most likely going to go with a Magnum.
    Pics are in order of assembly bottom to top.
     
    Last edited: Feb 25, 2016
  2. MG0h3

    MG0h3 Premium Member Premium Member Established Member Established Member

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    lame

    so you cooked it on 800?
     
  3. gabe1530

    gabe1530 Banned

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    yup, on my low 800 tune. remember that the rxt is rated at flywheel hp so at 800+ to the tire, its near the limit.
    i honestly think the rxt is perfect for cars in the 600 to low 700's.
     
  4. Bdubbs

    Bdubbs u even lift bro? Established Member

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    Have you considered trying the centerforce twin dyad?
     
  5. gabe1530

    gabe1530 Banned

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    yes i have. i have heard great reviews on that clutch.
     
    Last edited: Jan 4, 2016
  6. 98 Saleen Cobra

    98 Saleen Cobra Authorized Vendor Authorized Vendor

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    Brian, try to take pics of the grooves in the disks if you can..

    Saw the clutch in person.. Kinda sucks, but Mcleod doesn't rate the clutch in FTLBS which it really should.. The main factors to look at is weight of the vehicle and tq imo.. Rating a clutch in HP is stupid..
     
  7. 1raresnake

    1raresnake Active Member Established Member

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    Well at least you have found couple options. Just go auto:rockon:
     
  8. 04cobrawhine

    04cobrawhine Member Established Member

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    I run the DYAD in my 1000hp turbo cobra
     
  9. Zemedici

    Zemedici Well-Known Member Established Member

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    I would steer very clear of spec. I HATED the spec in my cobra.
     
  10. gabe1530

    gabe1530 Banned

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    glad to hear it. any more details that might steer me in the direction of getting one?

    yup, i am now. ive been reading a lot of bad reviews on their twin disc line.
     
  11. Cabbage

    Cabbage Active Member Established Member

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    I have a spec ss twin disc in my cobra and I don't make anywhere near the power you guys do and I hate it too. Worst clutch I've ever driven.
     
  12. Bdubbs

    Bdubbs u even lift bro? Established Member

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    Cool. I have one sitting in the box yet. That will be my next clutch.
     
  13. cj428mach

    cj428mach Well-Known Member Established Member

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    The DYAD comes with a dyno sheet showing what your specific clutch did, mine held 1330 ftlbs of torque.
     
  14. Maxspeed04svt

    Maxspeed04svt Member Established Member

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    I know some big hp ls guys running exedy twin clutches , they aren't a vendor on here so you don't hear much about them. But that's what I'd go with if I was going to a twin.
     
  15. Shadow Grey 03

    Shadow Grey 03 Well-Known Member Established Member

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    What is your torque #?
     
  16. 04cobrawhine

    04cobrawhine Member Established Member

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    Well first off it holds way more power then the RXT which is a no brainier. Then the fact that it's a full sprung hub vs the rxt that has 1 solid and 1 sprung. There's no stupid pivot ball to mess with because it's the same height as a stock single disc clutch. The pedal effort is like a hydraulic. Never any chatter or harsh engagement since the day I put it in. And just putting the 2 side by side you can tell there's a lot more R&D that went into the DYAD. It's a totally unique design.
     
  17. gabe1530

    gabe1530 Banned

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    13lbs - 725, 19lbs - 860
    Awesome, thanks for your input. Really appreciate it.

    Cool, ill look into exedys.
    Nice. Im really liking the dyad after reading all these good reviews.
     
  18. cj428mach

    cj428mach Well-Known Member Established Member

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    One thing I've heard is that the DYAD might be harder on the input shaft than your conventional twin disc. The DYAD only has 1 disc that has splines on it engaging the input shaft where as most twin discs have a set of splines on each disc helping to transfer the load to the input shaft.

    I'm only at 700rwhp and I street drive mine so I don't really worry about snapping the input shaft that much but a track car I could see the single set of splines being harder on the shaft.
     
  19. 04cobrawhine

    04cobrawhine Member Established Member

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    That is true, how ever the hub is about an inch think. It actually has more surface area contact on the input shaft that a twin disc.
     
  20. cj428mach

    cj428mach Well-Known Member Established Member

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    That maybe true as well. Although it might help that the RXT definitely has it spread over more area of the input shaft as the second set of splines is behind the floater vs the DYAD which is transferring all the power to the very front of the input shaft.
     

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