rev matching

[puk33]

purely opening this up for discussion, as im curious to see how other people drive a manual on the street. i am well aware that rev matching is mainly beneficial when on a race track, but can you take that concept of rev matching to the street and use it on a day to day basis. any long term advantages/disadvantages to drivetrain etc.

if people aren't aware what rev matching is basically it's when you push the clutch in to go down a gear your engine slows down to idle but your wheels and drivetrain keep moving at the current speed you're doing. When you release the clutch to select the lower gear in an instant you're asking the engine to run high RPM's, which in turn can cause the wheels to lock up causing a nasty twitch. Simply when you go to downshift and select a lower gear, before you release the clutch you blip the throttle (heel and toe style) then release, keeping the RPM's up. By rev matching on downshifts you keep the revs up which decreases the chance of the wheels locking up.

 

[Jeffaz]

i do this every day. just maks it smoother i find. plus sounds sick

 

[7R3N7]

yeah same i just do it without thinking now, only thing i haven't been able to master is the heel toe. always squeeze the brake too hard accidentally when trying to tap the accelerator. new brakes only make it harder lol

 

[Samwise]

I pretty much always downshift to 4th and then 3rd, rarely to 2nd. Usually just roll and clutch in after 3rd when coming to a stop.
Although I heel-toe (more like leftsideoffoot-rightsideoffoot) down the gears and into 2nd for smahing round corners.

Just makes driving so much more fun and involved when you mess around with shifting.
I don't give a sh*t if it's pointless or has minor wear on drivetrain. I do it cos it makes me more excited to get into my car in the morning

 

[d3x]

It's only really needed in transmissions without synchros using square dog engagement. I/we all still do it as it is fun and when perfected doesnt disrupt the balance of the car. That said on the track I use both methods with not much benefit either way.

I have footage of me doing it and it is cool to watch holding the brake, clutch in, neutral, clutch out, heel accelerator, clutch in, third, clutch out all in less than a second.

for those who don't know, the clutch is engaged and engine revved in neutral in order to bring the input and output shaft of the tranny up to speed versus just matching the engine to the tranny output leaving the synchros to still work bringing the input up to speed.

 

[Zhaktronz]

It's a useful trick for those of us driving tiptronic autos as well, although obviously more likely to use left foot braking than heel and toe

 

[unclepaulie]

Good for twin and triple plate clutches too. I like rev matching cause it puts less stress on a clutch and makes for smoother driving. After me doing it for so long, I hop into someone's car and its like nails down a blackboard to see them go from 4th to 2nd or 3rd (to go up a hill for example) and they just drop the clutch out abruptly.

 

[Jazza]

i heel-toe everyday lol. about 90% of my downshifts are heel toe. It's so natural and easy to get 100% perfect every time, even with an evo brake booster trent! lol

 

[7R3N7]

good excuse to hit mitchells pass more for practice i try to full heel toe though like foot on the angle not just right side of foot on accelerator and left on brake

 

[Res]

Im *poo* at heeltoe and rev matching, i have tried on a few occasions but yeh just no good at coordination
I used to try teach myself every day on the way to tafe for ages but yeh still suck at it

 

[81gl]

It's only really needed in transmissions without synchros using square dog engagement.

Definitely needed on those boxes, but I wouldn't say only...
If your selecting gears quite quickly; like thrashing the car through a few corners, rev matching will aid a standard gear box make a clean shift, rather than crunching it in to gear.

 

[Numb]

Yep i heel toe. Sounds good. I also do it minus the braking part (double clutch?) if i am overtaking some slow person.

 

[7R3N7]

double clutch is where you clutch in, put it in neutral, clutch out, rev match, clutch in, shift down a gear, clutch out. all within about a second. pretty difficult and pointless in modern cars

 

[Jazza]

Adrian you need to work on your takeoffs before you heel toe lol. You ride the clutch so much! You don't need to go past about 1500rpm to move off lol

The point of double clutching is so you don't burn your clutch so much, coz you're blipping the throttle when it's in neutral rather than having your foot on the clutch

 

[th0m0mx83]

Why bother? do it with the clutch in. its disengaged anyway.

 

[Trondabron]

Adrian you need to work on your takeoffs before you heel toe lol. You ride the clutch so much! You don't need to go past about 1500rpm to move off lol

The point of double clutching is so you don't burn your clutch so much, coz you're blipping the throttle when it's in neutral rather than having your foot on the clutch

?? The point of double clutching is to match the output and input gear engagement in the gearbox. So that it actually goes into gear. Synchros have eliminated the need for double clutching in cars these days.
Pretty much all cars these days have synchros in every forward gear, tho reverse is normally not synchrod and often straight cut. Thats why it whines when you drive fast in reverse, and why if your rolling backwards in the parking garage, you cant select reverse without grinding gears or double clutching.

There is a big difference in rev matching and double clutching.

 

[Numb]

Adrian you need to work on your takeoffs before you heel toe lol. You ride the clutch so much! You don't need to go past about 1500rpm to move off lol

The point of double clutching is so you don't burn your clutch so much, coz you're blipping the throttle when it's in neutral rather than having your foot on the clutch

Well it was my first race launch in the FTO.

 

[Jazza]

Oh well I was replying to what trent said, the point of whatever you call that then is so you dont have your foot on the clutch when you're blipping, right? It does the same thing.

Well it was my first race launch in the FTO.

Nah man at our mini meets when we're all leaving lol

 

[yukbumer]

i find rev matching easier on the clutch and a smother drive. its 2nd nature to me

not much of a fan of when people use the clutch as an engine brake when downshifting..

 

[Samwise]

not much of a fan of when people use the clutch as an engine brake when downshifting..

Haha my mate always does this because "engine brake and save the brake pads"
I just say I'd much rather change my brakepads than my clutch