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Thread: 7,000+ RPM

  1. #1
    Registered User CMC 289 JonnyD12GT's Avatar
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    Default 7,000+ RPM

    Looking to do a BOSS 302 Manifold or Cobra Jet on my 5.0

    How serious is the advice to upgrade the clutch/flywheel as a supporting mod?

    I've heard there are serious issues with the stock clutch when you go over 7,000rpm+

    The clutch pedal itself wont return out, but rather stays down at the floor.

    Anyone with some first-hand experience running the stock clutch up that high?

    Thanks!
    - Jonny D

    Candy-Red 2012 GT, Saddle Leather, Brembo Package Car, 6-Spd w/ 3.55's
    AirRaid CAI, BBK 85mm TB, JBA X-Pipe, Roush Axle-Back Mufflers, Ford Racing Pro-Cal Tune.
    Ford Racing Short Shifter, Ford Racing Boss 302R Lower Control Arms.
    Best E.T. to date 12.27 @ 116.0 with a 1.95 60ft.

  2. #2
    ^ Amateur Using Nitrous Oxide CMC Administrator MGLT's Avatar
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    Default

    I have a stock boss 302. I have to short shift just under 7,000 RPM. Otherwise the clutch pedal won't return. An aftermarket clutch is a good upgrade if you plan to wind out the RPM. I've read that the Cobra Jet reluctor wheel is a good upgrade also for better ignition performance at high RPM.
    -Matt

    2012 Mustang Boss 302 - Garage Queen Edition
    1990 Mustang 5.0 LX - Round the block race car
    1988 Mustang 5.0 GT

  3. #3
    Fat Tire Hotrods CMC SuperCobraJet strtcar's Avatar
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    Default

    Quote Originally Posted by MGLT View Post
    I have a stock boss 302. I have to short shift just under 7,000 RPM. Otherwise the clutch pedal won't return. An aftermarket clutch is a good upgrade if you plan to wind out the RPM. I've read that the Cobra Jet reluctor wheel is a good upgrade also for better ignition performance at high RPM.
    i doubt that wheel does anything, but i installed one anyways. It worked in my 8000 rpm destruction.

  4. #4
    Fat Tire Hotrods CMC SuperCobraJet strtcar's Avatar
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    Default

    I'd also do some research as to what your end goal is, the boss 302 intake is pretty much junk compared to either a ported 18 or a CJ intake, but depends on your goals.

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