ok just now I was trying out some rev matching. Like at 45mph hold engine at 2800 and then let it drop as you slide into 4th gear and it sets at like 2600 RPMs. Did this severa time with 3rd, 4th, and 5th gears.

It seemed to shift in just as smoothly as using a clutch . But is this really hurting anything? I wouldnt think so since nothing grinds or jerks or anything... I doubt this would save the clucth very much, but it sure does help when that left foot starts aching

 

personally I think it doesnt really do much. If are smooth with the clutch it shouldnt matter. Anyways its not going to speed up your shifting. Its fun though. Can you do it going into 5th. Mines a bitch. Downshifting like thats fun and people are always amazed.

 

It doesn't hurt as long as you don't FORCE it in. Just apply pressure until the revs match and it slips in. Same for downshifting, when you blip the throttle don't FORCE into a lower gear if it doesn't want to go. It actually saves wear and tear on the clutch. As long as you aren't putting extra wear and tear on the gearbox by grinding the syncromesh, then its worth it, yes it does impress passengers.

 

Actually if you do this it does put alot of wear and tear on your gearbox. Yes not as much as just jaming it into gear but a lot more than using the clutch. Why do you think they made the clutch? So you can round off your gears and leave your clutch intact? I have seen a gearbox where all the person did was powershift and a normal one and the gears on all but 1st were rounded very badly.. Our cars arent made to do this. Trucks are. Let them do it not us.

 

Clutchless shifting on upshifts is basically useless on the street, but does create unnecessary wear on the synchro rings. I would ask you, what is easier to replace, the clutch or the synchro rings/gears? And if your left foot is getting tired shifting with a hydraulic clutch, you need to do some leg exercises!

Now if you really want to save clutch life, practice matching revs on your downshifts. Perfecting heel/toe downshifts is one art of race driving that you can actually (and legally!) practice everyday on the street! It's a very satisfying feeling to go from 4-3-2 while matching revs w/ your right foot, all while braking for a corner or stop sign. Not to mention the racy sounds you make while doing it!

Give it a try!

 

ahhh... so even though i dont grind or anything it still wears more than a clutched shift.... gotcha

 

Yea.. Even if you dont hear the actual grinding it really is.. Think bout it. Your not forcing the gear in but you are aplying pressure which is what is causing the wear. Then when you finally match revs it will either be in perfect alignment(doesnt usally happen) or you will hit the top of the gear and it will slide in. The second happens anyways but the synchros usally will speed up/slow down the gears on either side to match with the other gear. That way when it goes in they are both spinning at the same RPM instead of grinding till they go in... Wish i had a diagram to show you. Would make explaning this much easier.
Sry for the spelling im pretty tired.

 

alright... I won't be doing that anymore

 

UM, its not bad as long as you dont ehar anything....


what do you think the clutch does? it disengages the ENGINE, so you can rev match MROE EASILY..... your STILL meshing the gears, jsut without the engine attached, tis the SAME DAM THING....

rev matching is just like having the clutch IN, because the engine is at the same speed as the gears are, so ti slides in AS IF YOU AHD the clutch..


its not BAD fro the egarbox as LOGN as your NOT grinding... sheesh

 

POWERSHIFT, that is NOT revmatching

of course thats bad, SHOVIGN teh gears in is different from gently egtting the engine to the smae speed as the gears

rev matching is NOT bad fro the car, POWERSHIFTING is, but no one said i was POWERSHIFTING in andres car


this is what one of the protege guys said: rev matching is beneficial if anything

 

when the clutch in my fiero (and yes, hydraulic clutches can be heavy, just drive a fiero for a week if you don't believe me) was acting up and it wouldn't release I'd shift without the clutch, actually seemed to work better into 3rd (stupid car would always grind into 3rd), but I wouldn't recommend doing it on a regular basis, as it WILL wear out your syncros much quicker, and clutches are easy to replace, syncros are not.