rev matching
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This is a discussion on rev matching within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; After reading the tranny thread its got me scared about the wrx i just picked up this weekend, so in ...

  1. #1
    Registered User clemsonteg's Avatar
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    rev matching

    After reading the tranny thread its got me scared about the wrx i just picked up this weekend, so in order to keep my tranny in the best possible shape i wanted to ask how you guys go about rev matching. Ive got an idea of what it is and i think in the few days i have owned the wrx i have learned how to drive it relatively well. when going to shift from gear to gear this is what i do
    1. push in clutch and let off gas simultaneously
    2. put into next gear, ie first to second, second to third and so on
    3. release clutch and press gas in a proportion that the shift isnt felt. What I mean is, when im done shifting gears if you are riding in the car you cant feel that i ever shifted.

    Would this be the way to go about things, im sure that just shifting fast and dumping the clutch would create a shock in the car hence grenading the weak tranny.

    Thanks in advance for the opinions

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  3. #2
    Registered User Micah's Avatar
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    Quote Originally Posted by clemsonteg View Post
    After reading the tranny thread its got me scared about the wrx i just picked up this weekend, so in order to keep my tranny in the best possible shape i wanted to ask how you guys go about rev matching. Ive got an idea of what it is and i think in the few days i have owned the wrx i have learned how to drive it relatively well. when going to shift from gear to gear this is what i do
    1. push in clutch and let off gas simultaneously
    2. put into next gear, ie first to second, second to third and so on
    3. release clutch and press gas in a proportion that the shift isnt felt. What I mean is, when im done shifting gears if you are riding in the car you cant feel that i ever shifted.

    Would this be the way to go about things, im sure that just shifting fast and dumping the clutch would create a shock in the car hence grenading the weak tranny.

    Thanks in advance for the opinions
    You've got the idea - shifts should be smooth. The closer you are on the rev's the smoother it will be. It's pretty easy on the upshift, a bit more challenging for downshifting.

    Mods such as lightened pulley and/or flywheel will also change the way you shift when rev matching due to their effect on rotational mass. In my case, changing to a lightened pulley effectively let me shift faster because the engine moves through the rev range a bit quicker. Food for thought.
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  4. #3
    Registered User Aerophyre's Avatar
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    Rev matching just means you modulate the throttle when shifting so the speed of the flywheel matches the speed of clutch disk. It usually pertains more to downshifting than upshifting. When downshifting you have to rev the engine to match the rpms of the lower gear, whereas in upshifting you just have to time the shift correctly so you let the clutch out at the right rpms.

  5. #4
    Registered User clemsonteg's Avatar
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    Quote Originally Posted by Aerophyre View Post
    Rev matching just means you modulate the throttle when shifting so the speed of the flywheel matches the speed of clutch disk. It usually pertains more to downshifting than upshifting. When downshifting you have to rev the engine to match the rpms of the lower gear, whereas in upshifting you just have to time the shift correctly so you let the clutch out at the right rpms.
    well i try to do the same method i mentioned above when downshifting as well, but I really only downshift when i go around a corner thats too tight for me to maintain speed or when i go up a hill that requires me to down shift. although i found out quick that this car actually has power as upposed to my civic which had no power and you had to downshift and cut off the ac haha

  6. #5
    Registered User Aerophyre's Avatar
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    WRX's are alittle tricky to learn as far as shifting goes. You cant just bang through the gears like a 2 wheel drive car. Dont worry though youll learn it quickly. You seem to be on the right track.
    Last edited by Aerophyre; 12-05-2006 at 06:07 PM.

  7. #6
    Registered User clemsonteg's Avatar
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    yeah everything seems fine so far, im just scared to drive it cause i dont want to mess up the tranny, but so far i have had zero gear grinds and zero mishifts and one poor attempt to show my ass at a stop sign and i realized that awd is nothing like fwd haha

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