Do you rev match when downshifting?

Discussion in 'Gearhead Garage' started by MSP, Feb 20, 2014.

  1. MSP

    MSP Haunting a dead forum...

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    A buddy of mine is a car nut, has owned all sort of exotics. And he was giving me hell the other day because I wasn't rev matching. "It'll cause wear and tear on your clutch and drive train!"

    From what I've read so far it's mostly a personal preference, and that unless you're dropping down to 2nd at 60mph and that sort of nonsense that the whole "wear and tear" thing is basically myth. Whatcha think?
  2. tweakmonkey

    tweakmonkey Webmaster Staff Member

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    Always... It's part of driving smooth :)

    Maybe if you have a low hp/tq beater, it's not as big of a concern, but the clutch on a Carrera GT for example is like $20,000, a Porsche GT3 it's $3000.

    It's hard on everything if you don't rev match, the flywheel, clutch disc/p.plate, even the engine and motor mounts since it takes a sudden shunt everytime you release the clutch and force the RPMs of the engine to match the drivetrain. If you rev match it's smoother for everything.
  3. MSP

    MSP Haunting a dead forum...

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    Well yeah, that GT3 clutch is about as expensive as my whole car! :)

    But yeah, I'm playing around with it now. In the upper gears I'm finding the increase in RPMs downshifting is negligible. For gears 1-3 it helps, and is certainly easy enough. With practice it'll be fun.
  4. tweakmonkey

    tweakmonkey Webmaster Staff Member

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    Yep you're right, I think 5th to 4th or 4 to 3 is the most fun downshift. It takes a lot of time to get good at it. Eventually you can do it while braking, heel-toe
  5. mistawiskas

    mistawiskas kik n a and takin names

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    I have one of those no HP rigs. It's smoother to match it up on DS. I do it more for the smoothness rather than the worry of
    wasting clutch lining. But.... if I had one of those Porches....you bet your bum I'd be watching out for every nanometer of wear.
  6. mullet1

    mullet1 Junior Member

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    eh, ~100HP ranger, when i downshift, the engine goes from a ~1000RPM idle up to maybe 1500RPM(no tach, haven't run calculations to be 100%), the amount of clutch material burned away doing that is probably pretty insignficant.
  7. MSP

    MSP Haunting a dead forum...

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    I guess I'm a freak, but I kinda like things jerky. Not to mention downshifting quickly with a tailgater behind is always good for a laugh.
  8. Commissar Smersh

    Commissar Smersh 2020 Staff Member

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    Perhaps it's the only time you feel like your Miata has power. :eek:
  9. tweakmonkey

    tweakmonkey Webmaster Staff Member

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    Wait MSP drives a Miata? If so, I approve.
  10. nidex

    nidex Hood Rich

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    Always revmatch. Watch the tach when you shift, both up and down, compare it with speed and you'll know exactly how high to rev it to get it to match.

    At 40mph in 3rd the car is at 3200rpm. At 40mph in 2nd, it's at 4000. So rev to 4000rpm, drop into 2nd and let the clutch out. A little feather of the throttle right as it goes into gear makes it extra smooth
  11. hans5849

    hans5849 Serious as a heart attack

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    Rev matching is the hardest part of driving a car you're not used to.

    I usually don't have to rev match when upshifting I just let the RPM's fall to where they're going to be and release.
  12. funkgab

    funkgab Junior Member

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    what is the proper way of rev matching anyways? is it clutch in, to neutral, rev, then lower gear then clutch out?

    i just give it a little gas with the clutch all the way in when i downshift so its smoother, but yeah idk how to revmatch..

    hell half of my friend's seem to not even put the clutch pedal in, they say its a waste of time and just do it with it half engaged, but they say "its engaged" i let him drive my car and he was grinding my gears -___-
  13. Commissar Smersh

    Commissar Smersh 2020 Staff Member

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  14. 86mcss

    86mcss Devouring your Soul

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    I was going to reply to his post but i thought to myself who really cares what I have to say especially since it is negative.

    I was going to reply along the lines... "this is why your ghetto friends will never have nice things".
    ccklqwleklwqe says thanks for this.
  15. hans5849

    hans5849 Serious as a heart attack

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    WELL, HE HIT IT ON THE HEAD
    ccklqwleklwqe says thanks for this.
  16. funkgab

    funkgab Junior Member

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    yeah i know.. whats sad is they are actually doing that with evos and e30 bmw's
  17. nidex

    nidex Hood Rich

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    Yeah well... those Evo trannies are made of glass, so keep banging that shit around and they'll find out what happens.
    But otherwise... what in the fuck is going on out there? Do I need to come supervise this shit?!
  18. nidex

    nidex Hood Rich

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    Lol... keep banging trannies... lololol :X highlarious
  19. mistawiskas

    mistawiskas kik n a and takin names

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    Everything would probably make more sense if you would. ;)
  20. MSP

    MSP Haunting a dead forum...

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    So I've been rev matching for about a month, it's pretty habit forming. And easy enough. But I should probably stop. I'm looking for an excuse to upgrade the clutch and flywheel. :)
  21. nidex

    nidex Hood Rich

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    If you're doing it right, it would work the opposite way of what you said. Rev matching increases clutch life.
  22. funkgab

    funkgab Junior Member

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    i think i'm doing it right, although heel-toeing seems to be a another pain in the dick
  23. MSP

    MSP Haunting a dead forum...

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    Well duh! That's why I said I should probably stop. :)