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Old 10-17-2013, 10:42 AM   #29
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That's called double clutching. Since sometime around the 40's when synchromesh became common it is totally unnecessary. That is unless you're driving a car without synchro.
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Old 10-17-2013, 10:56 AM   #30
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Will not double clutching wear the synchros down?
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Old 10-17-2013, 11:06 AM   #31
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Originally Posted by whaap View Post
It certainly makes changing gears a much smoother maneuver than just stabbing or blipping the throttle which is certainly better than doing nothing at all.

No. It does not.

This may be confusing to the OP and other readers wishing to learn. It is confusing because it is wrong.
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Old 10-17-2013, 11:11 AM   #32
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Not 'everyone'.
"Everyone" who knows what they're talking about.

Again, this may be confusing to the OP and others wishing to learn.

Most people on these forums ask about rev matching within the context of spirited driving, not "genteel" driving. They both have their place.

There is enough confusion already. Adding to it is counter productive.
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Old 10-17-2013, 11:26 AM   #33
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Concerning rev matching and heel-toe, the author writes:

"There isn't a successful race driver in the world who doesn't heel-and-toe on every downshift. And, again, it can be practiced every day on the street. In fact, that's the only way to drive all the time."

-Ross Bentley (Ultimate Speed Secrets; The Complete Guide to High-Performance and Race Driving)
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Old 10-17-2013, 11:56 AM   #34
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Quote:
Originally Posted by Porsche View Post
Concerning rev matching and heel-toe, the author writes:

"There isn't a successful race driver in the world who doesn't heel-and-toe on every downshift. And, again, it can be practiced every day on the street. In fact, that's the only way to drive all the time."

-Ross Bentley (Ultimate Speed Secrets; The Complete Guide to High-Performance and Race Driving)
To me there's a huge difference between rev matching and heel and toeing. Rev matching is what the average person would do going to the grocery store for a quart of milk. Heel and toeing is when a person, whether racing or not, is wanting to get the maximum performance out of their car. I'm at a comfortable point in my life where I don't have to push for performance to get my adrenaline to kick in. It's nice to no longer have to push the envelope.

Edit: the original post here (post #1) was in reference to rev matching and not heel and toeing. That might have led to some of the confusion.

Last edited by whaap; 10-17-2013 at 12:22 PM.
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Old 10-17-2013, 02:01 PM   #35
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Originally Posted by Porsche View Post
I've never driven one of those, so I cannot say for certain, but your logic is impeccable; the ECU needs to know WHICH gear has been selected in order to correctly match revs.

What make and model of vehicle are you referring to?

Your description indicates a manual transmission car. But, the BRZ/FR-S MT does NOT have auto-rev matching. Whereas, the automatic model DOES have auto-rev matching when downshifting. It does not have a clutch, of course. Therefore, your description above does not apply to our cars, either MT or AT.

Did that make sense?
I thought the MT has rev matching. Disregard my suggestion.
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Old 10-17-2013, 02:13 PM   #36
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Quote:
Originally Posted by whaap View Post
To me there's a huge difference between rev matching and heel and toeing. Rev matching is what the average person would do going to the grocery store for a quart of milk. Heel and toeing is when a person, whether racing or not, is wanting to get the maximum performance out of their car. I'm at a comfortable point in my life where I don't have to push for performance to get my adrenaline to kick in. It's nice to no longer have to push the envelope.

Edit: the original post here (post #1) was in reference to rev matching and not heel and toeing. That might have led to some of the confusion.
Rev matching is rev matching and heel and toeing is rev matching while braking. That's it, and it has nowt to do with what stage of your life you're at..

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Old 10-17-2013, 02:25 PM   #37
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Hey everyone! So I've been driving my FRS for 7 months already and I have enjoyed every bit of it! I've learned how to shift smoothly but I'm still a little bit rough at times especially from 1st to 2nd but most of the time its pretty smooth.

So i've been learning how to rev match lately and I've noticed that when trying to blip the throttle, it does take a while for the car to respond to the throttle. Most times I just hold the throttle midway for 1-2 seconds max to get the right rpm then I let go of the clutch. Am I doing this correctly? When I looked up rev matching people say you have to "quickly" tap the acceleration. I can't just tap it fast because the car doesn't register it fast enough for it to get to the right rpm.

Another thing I'm trying to learn is how to pick up speed fast. Meaning some people say rev match first but I feel like rev matching first then gassing it takes up to much time. Any other recommendations for picking up speed to pass someone up that still saves the clutch? Thanks everyone!
I completely understand what you mean. Basically, the throttle 'blip' isn't revving high enough, you have to push it harder to get it to the correct match-rev (the blip doesn't get it there).

This relates to how fast a car can rev in general. If the car doesn't have a quick rev/fast throttle response (stock flywheel/driveshaft), sometimes a quick blip doesn't raise the revs enough. I experienced this on a few of my past cars.

Ultimately, the "blip" just has to be a bit harder and requires a bit more foot roll. You have to adjust the blip to your cars rev/throttle response capabilities. You should never be holding it though, simply a more pronounced blip with your foot rolled further.
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Old 10-17-2013, 02:26 PM   #38
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Rev matching is rev matching and heel and toeing is rev matching while braking. That's it, and it has nowt to do with what stage of your life you're at..

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You describe two different functions. One while down shifting and one while down shifting and braking. That was my point. They are two different functions. Your point is what?
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Old 10-17-2013, 06:04 PM   #39
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You describe two different functions. One while down shifting and one while down shifting and braking. That was my point. They are two different functions. Your point is what?
I have no point Sir. Think of me as a BRZ-loving circle rolling idly around an internet forum.

Your point appeared to be, quite literally, that they are two hugely different functions, one apparently only only worth doing if you are an adrenaline crazed junkie who wants maximum performance out of their car. I was pointing out that the only difference is that one is done while braking and the other isn't. Heel and toe makes for a nice smooth changes that give me a sense of satisfaction. And happen to sound good, especially in the BRZ. No adrenaline chasing high performance shenanigans required.
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Old 10-17-2013, 07:47 PM   #40
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I have no point Sir. Think of me as a BRZ-loving circle rolling idly around an internet forum.

Your point appeared to be, quite literally, that they are two hugely different functions, one apparently only only worth doing if you are an adrenaline crazed junkie who wants maximum performance out of their car. I was pointing out that the only difference is that one is done while braking and the other isn't. Heel and toe makes for a nice smooth changes that give me a sense of satisfaction. And happen to sound good, especially in the BRZ. No adrenaline chasing high performance shenanigans required.
Yeah, I was responding to Porsche's quote in red suggesting there was no reason to not heel and toe all the time. As far as my habits go, I use my description of rev matching, for example, if I am approaching a traffic signal light. My method brings in engine braking which I've had as a habit pretty much all my life. As far as cornering goes my habits there have been formed by over 60 years of riding motorcycles where I will 'set up' and be in my gear of choice before I enter the corner and that will allow me to accelerate out of the corner. Since I don't participate in competitions I have no need to heel/toe which I know how to do.

I think what might have started some of the confusion is people referring to blipping or stabbing the throttle for rev matching. To blip or stab I totally understand when heel/toeing in corners. I don't agree with blips or stabs for simply rev matching to down shift.

Sorry for any confusion.
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