Rev Matching
Joined: Nov 2007
Posts: 8,841
Likes: 1,705
From: Illnoise. WAY downtown, jerky.
Rev matching is not only for the race track.
Using the clutch to "drag" the engine up to speed to match wheel speed will wear the clutch and motor mounts much faster than rev matching.
Just use your brakes. They're meant to slow the car down. And brakes are largely cheaper than a clutch.
Rev matching is matching the engine speed to the driveline speed before letting out the clutch. Its done for downshifting, usually. But it just means that you are bringing the engine to the needed RPM before releasing the clutch pedal.
Example of rev matching in a made up car/gear ratio:
-You're Cruising at 40mph in 5th gear. Engine revs are at 2000RPM.
-You feel the need to downshift to 3rd gear to accelerate or decelerate. 40mph in 3rd is 4000RPM.
-First push in the clutch. Then blip the throttle to increase engine speed to 4000RPM as you shift to 3rd. Then you release the clutch.
Since the engine is already at 4K RPM, you're not dragging on the clutch to bring the engine up to speed with the driveline.
If you're dragging on the clutch to match speeds, you will prematurely wear it and your motor mounts, as well as other driveline parts.
Using the clutch to "drag" the engine up to speed to match wheel speed will wear the clutch and motor mounts much faster than rev matching.
Just use your brakes. They're meant to slow the car down. And brakes are largely cheaper than a clutch.
Rev matching is matching the engine speed to the driveline speed before letting out the clutch. Its done for downshifting, usually. But it just means that you are bringing the engine to the needed RPM before releasing the clutch pedal.
Example of rev matching in a made up car/gear ratio:
-You're Cruising at 40mph in 5th gear. Engine revs are at 2000RPM.
-You feel the need to downshift to 3rd gear to accelerate or decelerate. 40mph in 3rd is 4000RPM.
-First push in the clutch. Then blip the throttle to increase engine speed to 4000RPM as you shift to 3rd. Then you release the clutch.
Since the engine is already at 4K RPM, you're not dragging on the clutch to bring the engine up to speed with the driveline.
If you're dragging on the clutch to match speeds, you will prematurely wear it and your motor mounts, as well as other driveline parts.
Joined: Mar 2013
Posts: 2,730
Likes: 38
From: Portland
Originally Posted by B serious
I rev match and heel toe everywhere. I am going to shamelessly say that I am ridiculously good at it. Its a terrible habit. If you're coming to a stop...you should juse use the brakes. If you're coming to to a turn or slowing down, you should use the brakes and then downshift ONCE after you are done slowing down. Nobody rev matches perfectly. You are always mismatching a bit, and this speeds up wear on your driveline, whether you know/admit it or not. But...I just always do it out of habit lol. My GF drove stick for years. Her summer car was an AP2. She never learned rev matching. She drove the car very smoothly unless she had to slow down and/or turn. There may, at that point have been a little bit of lurching if she had to put it in a lower gear. But she still enjoyed driving a manual car. And sometimes will still drive my car(s) if she's inclined.
Have no idea where you got the once from. If I am going from fifth to second there's a blip for fourth, third and second. A blip for each gear.
And about your wear comment, no. If you're doing it correctly there won't be additional wear. It's an on off thing if you match properly, which in this car isn't hard at all.
No need for heel and toe on the street. Throw it in to neutral and just brake to a stop. You sound like a pretender otherwise.
Registered User
Joined: Sep 2010
Posts: 3,724
Likes: 5
From: Atlanta, GA
I have ECU rev matching on my Cayman and LOVE it. I never got the hang of heel-toe downshifts so the revmatching makes things much more manageable on the track. On the street I'm not braking (then accelerating) hard enough to actually need it.
Registered User
Joined: Jul 2009
Posts: 8,655
Likes: 171
Heel toe required a fair amount of brake pedal pressure in the S2 thousand for me. It was only doable on the track. On the street you have to be driving far too aggressively and I never drive that hard on public roads. Heel toe has its place though. While driving 8 to 10/10 you don't have the time that you do on the street to get on and off the brake and gas to blip. As for where by booking and read matching the clutch and flywheel are in approximately the same speed reducing wear.
Joined: Dec 2001
Posts: 5,171
Likes: 121
From: Boston
There was no mention of double clutching in the article. I would find it too hard to not rev match if I had the auto rev-match turned on. I do by instinct and would have to re-learn to use the auto rev match.
The two best manual features to come along are hill assist and electronic e-brake. I haven't tried the hill assist on my buddy's 991, but said it works pretty good. Never having to worry about the e-brake is another terrific feature on 991 manual. I am not doing any rally driving and hill assist negates have to f around the traditional e-brake on a hill.
The two best manual features to come along are hill assist and electronic e-brake. I haven't tried the hill assist on my buddy's 991, but said it works pretty good. Never having to worry about the e-brake is another terrific feature on 991 manual. I am not doing any rally driving and hill assist negates have to f around the traditional e-brake on a hill.
Joined: May 2002
Posts: 19,734
Likes: 247
I focused on learning to heel-toe when braking and rev matching as soon as I got my first car. I'd already learned on dirtbikes, so I understood the concept. The rev matching is the easy part while heel-toe action is tough only because of the need to balance braking and throttle modulation to get it all right.
Ultimately, it's very rewarding and your car will thank you if you ever drive it on track.
However, when I drove the new C7 (friend has one), I tried the auto rev match feature and loved it. In hard driving, I'd just hit the braking zone, stand on the brakes and just clutch in, shift, clutch out without ever removing my foot from the brake or rotating to stab the throttle. It was magical - a nice blend of driver engagement without some of the stress of "needing" to nail the heel-toe downshift mechanism through a couple of gears.
So, I'd love to have auto rev matching on my next car. I'd still master heel-toe in that particular car but on the track, I can pretty much guarantee that I'd have it set to auto-match. Way faster, way smoother and let's me focus on other things.
Ultimately, it's very rewarding and your car will thank you if you ever drive it on track.
However, when I drove the new C7 (friend has one), I tried the auto rev match feature and loved it. In hard driving, I'd just hit the braking zone, stand on the brakes and just clutch in, shift, clutch out without ever removing my foot from the brake or rotating to stab the throttle. It was magical - a nice blend of driver engagement without some of the stress of "needing" to nail the heel-toe downshift mechanism through a couple of gears.
So, I'd love to have auto rev matching on my next car. I'd still master heel-toe in that particular car but on the track, I can pretty much guarantee that I'd have it set to auto-match. Way faster, way smoother and let's me focus on other things.
Registered User
Joined: Sep 2010
Posts: 3,724
Likes: 5
From: Atlanta, GA
There was no mention of double clutching in the article. I would find it too hard to not rev match if I had the auto rev-match turned on. I do by instinct and would have to re-learn to use the auto rev match.
The two best manual features to come along are hill assist and electronic e-brake. I haven't tried the hill assist on my buddy's 991, but said it works pretty good. Never having to worry about the e-brake is another terrific feature on 991 manual. I am not doing any rally driving and hill assist negates have to f around the traditional e-brake on a hill.
The two best manual features to come along are hill assist and electronic e-brake. I haven't tried the hill assist on my buddy's 991, but said it works pretty good. Never having to worry about the e-brake is another terrific feature on 991 manual. I am not doing any rally driving and hill assist negates have to f around the traditional e-brake on a hill.
Joined: Dec 2001
Posts: 5,171
Likes: 121
From: Boston
Originally Posted by mosesbotbol' timestamp='1445348641' post='23780878
There was no mention of double clutching in the article. I would find it too hard to not rev match if I had the auto rev-match turned on. I do by instinct and would have to re-learn to use the auto rev match.
The two best manual features to come along are hill assist and electronic e-brake. I haven't tried the hill assist on my buddy's 991, but said it works pretty good. Never having to worry about the e-brake is another terrific feature on 991 manual. I am not doing any rally driving and hill assist negates have to f around the traditional e-brake on a hill.
The two best manual features to come along are hill assist and electronic e-brake. I haven't tried the hill assist on my buddy's 991, but said it works pretty good. Never having to worry about the e-brake is another terrific feature on 991 manual. I am not doing any rally driving and hill assist negates have to f around the traditional e-brake on a hill.
Joined: Dec 2008
Posts: 3,576
Likes: 332
From: Montana
I hate electronic e-brakes. To me the whole point of having an emergency brake is that it's a direct mechanical link...the brakes! The E-brake does away with this. Nevermind the potential safety issue, but who needs the added complexity just for the sake of making it more complicated?
No thanks!
As to heel toe shifting...I'm horrible at it. I just can't do it well. Maybe it's because I have long legs and big feet but I just can't do it well and I've been driving manual transmission equipped cars exclusively for the last 16 years.
No thanks!
As to heel toe shifting...I'm horrible at it. I just can't do it well. Maybe it's because I have long legs and big feet but I just can't do it well and I've been driving manual transmission equipped cars exclusively for the last 16 years.