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> rev matching
post Oct 29, 2006 - 8:02 AM
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pnoywitmustrdsau...

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Revv matching i think thats what its called, it is when you get up to a certain rpm that you are able to shift gears without using your clutch pedal! my question is, is this technique bad? i mean when i shift it, there is no grinding of gears and it feels like a normal shift whether i'm using the clutch pedal or not.

This post has been edited by pnoywitmustrdsauce: Oct 29, 2006 - 8:02 AM
post Oct 29, 2006 - 9:06 AM
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playr158



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as long as there is no grinding there is no damage being done...
while sometimes i find this technique to be slower when accelerating, its not a bad way to slow down and engine brake

This post has been edited by playr158: Oct 29, 2006 - 9:07 AM
post Oct 29, 2006 - 10:15 AM
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Kwanza26



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Upshifts... OK

Downshifts... St00pid


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1995 AT200 Celica ST: stocked out daily driver...

1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies...

1991 SW2x MR2 n/a: bare bones hardtop model soon to be...
post Oct 29, 2006 - 1:39 PM
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Jaws4God



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how do you learn how to do that? I don't plan on doing it on a regular basis but i know my dad had to drive home one time after his clutch broke...



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post Oct 29, 2006 - 3:42 PM
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pnoywitmustrdsau...

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down shift naw dont think so, i just do it on the upshift, i learn it from a friend and basically there will be a certain rpm where it matches the transmission spedd thus being able to shift without clutch pedal!
post Oct 29, 2006 - 5:27 PM
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sinner96ST



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i do this all the time on my gsxr, it's easy once you figure out how to do it.

however, i wouldn't recommend it on a car, just be quick on shifting and you'll be okay.
post Oct 29, 2006 - 8:38 PM
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Shocker

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my mom could do this in her sc300..i always wanted t do it..but im not sure how and didnt want to break any thing trying


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post Oct 29, 2006 - 8:43 PM
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Bitter

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its a bad idea, you'll never get close enough and you'll just eat up your synchro's much faster than you should.


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post Nov 10, 2006 - 7:48 AM
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tufy



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QUOTE(sinner96ST @ Oct 29, 2006 - 10:27 PM) [snapback]497350[/snapback]

i do this all the time on my gsxr, it's easy once you figure out how to do it.

however, i wouldn't recommend it on a car, just be quick on shifting and you'll be okay.

your bike has dog engeggement and stright cut gears m8.
thats how they do it at races with dogbox. its harder to rev macth with helical cut gears.


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post Nov 10, 2006 - 10:48 AM
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Punisher

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QUOTE(tufy @ Nov 10, 2006 - 7:48 AM) [snapback]501272[/snapback]

QUOTE(sinner96ST @ Oct 29, 2006 - 10:27 PM) [snapback]497350[/snapback]

i do this all the time on my gsxr, it's easy once you figure out how to do it.

however, i wouldn't recommend it on a car, just be quick on shifting and you'll be okay.

your bike has dog engeggement and stright cut gears m8.
thats how they do it at races with dogbox. its harder to rev macth with helical cut gears.


w0rd.
I always thought that rev matching is when you say downshift.. when you suck the clutch in you rev the engine and then let the clutch out at approx. the RPM that the downshift will land you at so that way it's a perfect match and you don't slip the clutch or jerk the engine..

Try double clutching.. that's real fun.. I did that for a while in my 5gc cuz 2nd gear synchro was messed and I couldn't downshift into it with out double clutching. (thank God for synchromesh)


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post Nov 10, 2006 - 11:43 AM
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you'll be making a post about "my car is grinding into some gears" sooner than later if you 'rev match' and shift without the clutch.


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post Nov 10, 2006 - 4:03 PM
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Kwanza26



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QUOTE(Punisher @ Nov 10, 2006 - 3:48 PM) [snapback]501319[/snapback]

w0rd.
I always thought that rev matching is when you say downshift.. when you suck the clutch in you rev the engine and then let the clutch out at approx. the RPM that the downshift will land you at so that way it's a perfect match and you don't slip the clutch or jerk the engine..

Try double clutching.. that's real fun.. I did that for a while in my 5gc cuz 2nd gear synchro was messed and I couldn't downshift into it with out double clutching. (thank God for synchromesh)

BUT... if you read the original post... he's not talking about rev matching... but shifting without the clutch. You can upshift without the clutch by rev matching quickly between shifts... but this isn't a practical way to downshift. What you're talking about is straight downshifting, which does require use of the clutch to insure proper transfer.


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"It's ok to be naked girl... I'm an artist!"

1995 AT200 Celica ST: stocked out daily driver...

1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies...

1991 SW2x MR2 n/a: bare bones hardtop model soon to be...
post Nov 10, 2006 - 9:28 PM
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macavely



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QUOTE(Kwanza26 @ Oct 29, 2006 - 10:15 AM) [snapback]497262[/snapback]

Upshifts... OK

Downshifts... St00pid



Yea what that guy said ..


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post Nov 11, 2006 - 12:17 AM
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Bigmeanbulldog55



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Seems to be no way to rev match quicker in up shifting than you could by using the clutch. When I've drag raced before, I don't let off the gas. You let off a little, but still keep your foot mostly down the intire time. That's the quickest I've found. You would have to have a super light flywheel to rev match going up. Even when I had my light flywheel, the rpms would not drop to were the next gear was between shifts, and this is when I was driving the Celica and letting off the gas between gears.


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