Rev Matching

[bmwzoom]

I was just introduced to rev matching today... Im curious to hear thoughts on it. Good or bad for the car? Why?

[felt]

I think I may have rev-matched like 3 or so times in the 35,000 miles I put on my MS3. Clutch still engages like new, tranny is shifting like buttah and the car still haulin' ass.

[hyun]

You don't rev match when you down shift? o_O

[felt]

Originally Posted by hyun You don't rev match when you down shift? o_O

nope.

[Say Chi Sin Lo]

... so... How have you been downshifting? Downshift and just drop the clutch?

[felt]

Originally Posted by Say Chi Sin Lo ... so... How have you been downshifting? Downshift and just drop the clutch?

.................quickly downshift from 6th to 5th or 4th, slowly let the clutch out.......................the revs don't drop fast............my downshifts are fairly smooth if i let out the clutch out slowly..............when.......................... .................................................. ........downshifting.


....................................

[thebigcheese]

rev matching is fine if you hit the right RPMS, but it definetely burns gas faster.
the way i see it is, it's cheaper to just buy new breaks instead of having to pump gas more periodically

[felt]

Originally Posted by thebigcheese rev matching is fine if you hit the right RPMS, but it definetely burns gas faster. the way i see it is, it's cheaper to just buy new breaks instead of having to pump gas more periodically

You're going to need to downshift eventually man..Can't stay in 1 gear all the time.

[Say Chi Sin Lo]

You mean engine braking? Engine braking doesn't waste any more gas than riding on your brakes.

[ms3077]

I rev match down shift all the time.

It saves the clutch and the brakes and like "Say" said it doesn't waste anymore more fuel than braking. It requires a bit more effort / skill but that's about it.

[Say Chi Sin Lo]

Trust me, if you're not rev-matching, you're driving it wrong. Too high of a gear, you're lugging the engine and stressing it out. Downshift, rev-match so you don't kill your clutch and the rest of your drivetrain, then accelerate when you're in the powerband.

Besides, that's how you go into a corner anyways.

[NCZ13]

i rev match out of habit. It feels weird if i dont downshift like that.

[Smoker6]

I don't think I've ever downshifted without a blip of the throttle to rev match. I would feel dirty for dumping the clutch like that.

To answer your question:
Good for the car. Smoother downshifts and reduces wear on syncromesh gears. Sounds sexy - may get you laid if done well enough.

[Say Chi Sin Lo]

The car lets me know if I didn't rev-match, or if I screwed up.

[FenixTX717]

Rev matching FTW.

[myzoomzoom3]

i just do it out of habit lol i dont even try plus sounds cool

[HLR Element]

... i assumed it was universal that everyone rev matched on down shifting... i don't even realize i'm doing it anymore.

[Blackspeed]

Originally Posted by Say Chi Sin Lo Trust me, if you're not rev-matching, you're driving it wrong. Too high of a gear, you're lugging the engine and stressing it out. Downshift, rev-match so you don't kill your clutch and the rest of your drivetrain, then accelerate when you're in the powerband. Besides, that's how you go into a corner anyways.

theres no need to rev match if the rpms are already low enough to downshift, so saying you arent driving it right is a huge blanket statement. Whay arent you double clutching if your worried about your car? this puts less stress on the transmission and synchros.

[bmwzoom]

Everything you guys have said is about the same my buddy said. Thanks for the info.

[speedms6]

is this a serious thread? i am not sure i have ever downshifted and not rev matched. it saves your clutch and puts less stress on the tranny and the engine if the flywheel clutchdisc are moving at the same speed. i didnt know it was an option not to rev match except when going real slow or something

[tbot]

I rev match only out of habit from driving semi's where its basically a MUST DO or else you grind gears haha. Ever since then its followed me everywhere, but before those years, I didn't.

[byau]

i rev match on every downshift. i like the smooth shifts

[stefan]

i rev match all the time as well when i'm coasting to a stop or otherwise need to downshift (passing etc), however i am still having trouble braking and hitting the gas at the same time. i either hit the brakes way too hard once i tap on the gas, or i hardly hit the brakes at all... gotta keep practicing i guess.

[Arrowpoint]

I rev match. When I first got the car I found that during hard breaking it was easy to heel toe but in dayly driving the brake pedal didn't go down toward the floor enough to be easy for me to do that so I made a new accelerator pedal at the gun shop. It works really well in any braking situation. So yes, I rev match every time I downshift. The car loves it and it's nice because you can keep the rpms right where you want them.

[Blackspeed]

Originally Posted by speedms6 i didnt know it was an option not to rev match except when going real slow or something

synchros have been around for a long time. These let you shift without rev matching. Basically the only thing your doing by not rev matching is riding the clutch. Its the same as riding the clutch when you take off.

[burntRice]

Originally Posted by felt .................quickly downshift from 6th to 5th or 4th, slowly let the clutch out.......................the revs don't drop fast............my downshifts are fairly smooth if i let out the clutch out slowly..............when.......................... .................................................. ........downshifting. ....................................

wat do u do if u goota make a quick move though? cuz the slow approach works great until this situation...do u just dump the clutch then cuz i was taught double clutch that bitch to save clutch, syncros, brakes, n look sexy with all that movement lolol

Originally Posted by Arrowpoint I rev match. When I first got the car I found that during hard breaking it was easy to heel toe but in dayly driving the brake pedal didn't go down toward the floor enough to be easy for me to do that so I made a new accelerator pedal at the gun shop. It works really well in any braking situation. So yes, I rev match every time I downshift. The car loves it and it's nice because you can keep the rpms right where you want them.

heal toe gives me a cramp lol...i need to do this thankz!

[predapio]

Originally Posted by Arrowpoint I rev match. When I first got the car I found that during hard breaking it was easy to heel toe but in dayly driving the brake pedal didn't go down toward the floor enough to be easy for me to do that so I made a new accelerator pedal at the gun shop. It works really well in any braking situation. So yes, I rev match every time I downshift. The car loves it and it's nice because you can keep the rpms right where you want them.

That's a cool pedal, but unfortunately I was blessed with snowshoe wide feet.

I dont even have to move my foot, I just roll into the gas.

Yes I rev match on every downshift.

[Arrowpoint]

Originally Posted by Blackspeed synchros have been around for a long time. These let you shift without rev matching. Basically the only thing your doing by not rev matching is riding the clutch. Its the same as riding the clutch when you take off.

Another words with synchros you can spend more money replacing worn out clutches by not rev matching. The most clutch wear I have is from backing out of my parking space at work. It's a steep up hill grade and in my opinion reverse is too tall on this car.

[Jujiro_Prodigy_31]

op, turn the dsc off, while cruising at 60 mph, drop third, while the clutch is still engaged send your rpm's up to 5k, release clutch (not slowly let off). enjoy!

you will have rev matched perfectly and done no damage to anything and experienced the power of the ms3. it will give you a kinda fast and the furious feel for a split second, like in the scenes when you see them spray and all the lights on the side of the road streak past them. lol, not really, but u know what i mean.

i started playing around with rev matching a while back and the car is a lot more fun to drive now. it is also a testament to how well you know your car. u will eventually get to a point where you know exactly what rpm to be at, in whatever gear at whatever speed. u will know when u have it down because when u let off the clutch there will be absolutely no engine strain. it is the best way to drive a manual car imo.

[GTISPEED3]

I don't think I ever rev match when I downshift. I just down shift slowly 1 gear at a time and release the clutch slowly. Had my 01 sentra with 103k miles on it and never replaced the clutch once and when I traded it for the ms3 the clutch was still fine and I beat the shit out of that car too, I can't remember how many times I would rev that shit up and dump the clutch for burnouts. Maybe it was just a good clutch in that car, I heard the sr20s and their transmissions were really reliable.

[fjames]

Rev matching is a skill, as is double clutching (which I do half the time.) If you don't possess the skill, you can't use it when appropriate. I suggest anyone new to manual trans practice both skills until you can do it at will, without thinking. Or just admit you suck at driving.

Passing on two lanes, entering corners, any quickly needed downshift is better when rpms are matched - less driveline shock = more stable car (reduced weight transfer, momentum maintained for two examples.)

Oh, you don't need to blip it, half the time I just leave the go pedal where it is and slide it into the next lower gear - you can also double clutch like that.

[Blackspeed]

Originally Posted by fjames Oh, you don't need to blip it, half the time I just leave the go pedal where it is and slide it into the next lower gear - you can also double clutch like that.

so......you no lift downshift? Im assuming your talkin about downshifting to accelerate?

[Regulator]

I rev match just about every time I down shift. The only time I don't rev match is when I'm slowing down and using the gear change to help slow the car. My old 6 had 70,000 on the stock clutch and the new cars clutch is going strong too so I'm gonna continue doing it & burning a little extra gas

[Smoker6]

Originally Posted by Blackspeed so......you no lift downshift? Im assuming your talkin about downshifting to accelerate?

I do the same pretty often. I let up only slightly on the accelerator pedal which bumps the RPMs just enough to be where I want them to be and makes the downshift even smoother than blipping the throttle.

Basically I do what the 370z syncro rev matching does (raise RPMs and hold there until I select the gear I'm going into).

[Say Chi Sin Lo]

Originally Posted by Blackspeed theres no need to rev match if the rpms are already low enough to downshift, so saying you arent driving it right is a huge blanket statement. Whay arent you double clutching if your worried about your car? this puts less stress on the transmission and synchros.

You are correct.

And to people that can't do heel toes, just do the side-step. The brake pedal and gas pedal are close enough. I admit that heel toe-ing is kind of a pain, and impractical on the streets. Because you almost never have to slow down that much in such a short distance. And if you do, you're better off worrying about just stopping the car vs going again.

I do the side step whenever I rev match.

Also, it did take me a while to learn how to rev match, but once you do it often, it's like second nature. I don't even think about how hard I need to step on the gas, I just do. And when I rev match, 90% of the time it's smooth.

Besides, it's fun!

[fastdreams]

I do it most of the time on the street, every time at the track.

[AmillieMS6]

i would recommend rev matching

as for felt, hes just a lost child

[fjames]

Originally Posted by Blackspeed so......you no lift downshift? Im assuming your talkin about downshifting to accelerate?

Yeah, like what Smoker6 said, for instance to maintain desired rpm range in traffic or preparing to pass on a two lane.

I drove 18 wheeler in my yute and I learned to powershift downshift from this old-timer. Once you get the feel (remember no synchros so double clutching necessary) when climbing a hill where downshifting is needed (so you're floored and loosing power) you take up the slack in the shifter then just pop the clutch pedal. If you have the skill down to manipulate the fuel pedal right, it all works and it just slams into the next lower gear. It's the fastest way to downshift under load I know of, but most people never do it because it takes some practice or they don't even know to do it.

I'm talking about heavy trucks of course, no point in a car. When you break torque going up a 7% grade and you weigh 40 tons, it's like slamming on the brakes, so you want to shift as quickly and cleanly as possible. The scenario just described is every rookies nightmare lol.

[felt]

fuck rev matching

[andrew88]

its all about the heel-toe