Rev matching
#1
Rev matching
None of my upshifts are smooth but my downshifts are worse... everyone talks about rev matching but how do i know what rpm i want for each downshift?
also...
Should i "blip" in the new gear (with the clutch in of course)?
Do i then gently give it gas while i release the clutch?
I am still sucking at shifting and my pride is taking a beating
also...
Should i "blip" in the new gear (with the clutch in of course)?
Do i then gently give it gas while i release the clutch?
I am still sucking at shifting and my pride is taking a beating
#3
Originally Posted by takahashi
No heel toe in a new clutch but good heel toeing is nice when driving hard. You are not subject the car into such a high rev to require heel toeing right? hehe
#4
Heel-toe is a technique when you down shift.
You downshift from say 3rd to 2nd, you want to avoid compression lock up, that is when the engine suddenly engage in high rev and lock up. Like locking up the rear wheel.
So you press down the clutch and start down shifting, and at the same time, press the gas to match the rev of a lower gear, THEN you release the clutch.
It is very useful in wet tracks.
You downshift from say 3rd to 2nd, you want to avoid compression lock up, that is when the engine suddenly engage in high rev and lock up. Like locking up the rear wheel.
So you press down the clutch and start down shifting, and at the same time, press the gas to match the rev of a lower gear, THEN you release the clutch.
It is very useful in wet tracks.
#5
Originally Posted by takahashi
You downshift from say 3rd to 2nd, you want to avoid compression lock up, that is when the engine suddenly engage in high rev and lock up. Like locking up the rear wheel.
a.k.a "back scratch"
#6
That isn't heel-toeing. What you described is rev-matching.
For starters, heel-toeing is only necessary when you want to slow down and do a rev-match downshift all at the same time (ie, heading into a corner). Why? You need to use all three pedals at the same time. Using your right foot, you use the heel to add gas (with the clutch in or in neutral - I'll get to that in a minute), and the toe to brake. Thus the term heel-toe.
The advanced form of this is double clutching. It's exactly the same thing, except you put the clutch in, shift into neutral, clutch out, revmatch, clutch in, downshift, clutch out. The advantage to this is you save your syncros, and very necessary in a car without syncros. It's job is to match the layshaft with the engine speed.
For starters, heel-toeing is only necessary when you want to slow down and do a rev-match downshift all at the same time (ie, heading into a corner). Why? You need to use all three pedals at the same time. Using your right foot, you use the heel to add gas (with the clutch in or in neutral - I'll get to that in a minute), and the toe to brake. Thus the term heel-toe.
The advanced form of this is double clutching. It's exactly the same thing, except you put the clutch in, shift into neutral, clutch out, revmatch, clutch in, downshift, clutch out. The advantage to this is you save your syncros, and very necessary in a car without syncros. It's job is to match the layshaft with the engine speed.
#7
Here's what heel and toe looks like from the pedal standpoint in my Integra:
http://homepage.mac.com/gkawano/heel%20and%20toe.mov
The first shift is single clutch, the second is double clutch. Sorry I don't have the shifter movement shown, but it happens as usual while the clutch is down.
http://homepage.mac.com/gkawano/heel%20and%20toe.mov
The first shift is single clutch, the second is double clutch. Sorry I don't have the shifter movement shown, but it happens as usual while the clutch is down.
#8
Originally Posted by 5Gen_Prelude
For starters, heel-toeing is only necessary when you want to slow down and do a rev-match downshift all at the same time (ie, heading into a corner). Why? You need to use all three pedals at the same time. Using your right foot, you use the heel to add gas (with the clutch in or in neutral - I'll get to that in a minute), and the toe to brake. Thus the term heel-toe.
I do what exactly gansan posted - the first one. I want to ask gansan... that if I am lazy to double clutch, I can leave the clutch pressed, right?
Gernerally, when to heel toe and when to double clutch??
Thanks
#9
Originally Posted by takahashi
I have read it ten times. I have trouble thinking it is different from what my Porsche Carrera Cup professional racer taught me - "heel-toe". The heel toe is from the old days when the brake and gas is far away that you need to use heel and your toe. Now it is more like toe-side of foot.
I do what exactly gansan posted - the first one. I want to ask gansan... that if I am lazy to double clutch, I can leave the clutch pressed, right?
Gernerally, when to heel toe and when to double clutch??
Thanks
I do what exactly gansan posted - the first one. I want to ask gansan... that if I am lazy to double clutch, I can leave the clutch pressed, right?
Gernerally, when to heel toe and when to double clutch??
Thanks
#10
Taka, they are three totally different techniques:
Rev Matching = Clutch in, rev engine speed to match the gear you are shifting to, clutch out.
Double Clutch = Clutch into neutal then rev engine speed to match the gear you are shifting to, clutch into the next gear.
Heel and toe = Braking while blipping the accelerator with the same foot.
And yes, For racing, the Heel and Toe technique are usually use TO perform the Rev Matching technique.
Rev Matching = Clutch in, rev engine speed to match the gear you are shifting to, clutch out.
Double Clutch = Clutch into neutal then rev engine speed to match the gear you are shifting to, clutch into the next gear.
Heel and toe = Braking while blipping the accelerator with the same foot.
And yes, For racing, the Heel and Toe technique are usually use TO perform the Rev Matching technique.
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