I'm surprised they don't teach this in driving schools anymore :/
It's a very handy procedure even in normal driving sometimes. It's funny hearing someone driving up a hill in a car with a big load and running out of puff. Then they make a rough downchange to get back in the torque curve but the car still struggles a bit. Double de clutch it!
It's handy too when you need to overtake someone quickly on the highway, without a really brutal, sudden jump in revs.
Nice driving mate! Makes me remeber when i was learning dcht when i was 18 yr old in my toyota corolla 92, sweet times on the roads in stockholm. Don't have a car right now, i'm studying so I have to watch these videos instead :P I will put up a video of me doing this if i get the chance though :)
this is hard if you have no coordination. Once you learn it, downshifts can be performed earlier and smoother for sure. i can do it ,just not as fast as porfessional race car drivers.
I have a 172 and a 911 Carrera. On trackdays, Double declutch H/T downshift is more or less obligatory with a 911 fitted with a type 915. Its has pedals well suited for it. Can't say the same for my 172, despite the ally pedals, the brake and gas pedals are too far apart. The technique's used to smooth out the change to keep chassis balance and its quicker than synchros, at least on old 911's
why are you double de clutching when your gearbox has syncro? your gearbox is already syncronized. i've never seen HT and Double Clutching used together before.
I know it has a syncromesh...it's a driving technique I thought I'd have a go at.
Also, to double de-clutch you have to rev the engine with the clutch up in neutral, so you naturally have to heel/toe if you're on the brakes when you do it.
I'm not sure how it would be possible to do it without heel and toeing when you're on the brakes?
yeh your right, its impossible not to HT while double de-clutching on the brakes, whenever i HT i don't bother with the double de-clutch. i must try it to be honest but i don't think it will make much difference. i wasn't having a go, i was just intrigued to know why you using both techniques at the same time. good job anyway
This video shows the proper technique to dbl-clutch a downshift.
Reving an engine while in "Neutral" gear, w/clutch pedal released, is the only time transmission gears can be matched with engine rpm.
Other videos reving while clutch is depressed are wrong and damaging.(idiot in Lotus)
Any time the clutch pedal is depressed, the engine is seperated from the transmission. Reving will only spin the engine. Choritsu-shi NomuraTuning&Design
Thanks man, that's exactly the question I had for a long time.I always thought why you have to switch in the neutral gear and then throttle and not just throttle when you depressed the clutch.
I don't fully agree. It's true that dbl-declutch is the ONLY way to match gear speed and engine speed, but this is necessary ONLY with not-sincronized transmissions.
Racers with sincronized transmission use simple heel&toe downshifting, cause they're interested in matching engine speed and rear wheels' speed, to avoid rear wheels locking under severe braking. You can see both tecniques under "Punta tacco - heel & toe" and under "Heel and toe double declutch downshifting". ;)
@Losna61 You and the racers are wrong. There's no such thing as, simple heel&toe downshifting. You may think that it works, but it's IMPOSSIBLE to match rev any engine and transmission while the clutch pedal is pushed down... they're both separated.
heel&toe is double clutching a downshift while braking. This allows for a smooth engagement and not to upset the balance of a car while entering a turn. This technique applies to syncronized and non-syncronized transmissions.
@Losna61 You and the racers are wrong. There's no such thing as, simple heel&toe downshifting. You may think that it works, but it's IMPOSSIBLE to match rev any engine and transmission while the clutch pedal is pushed down... they're both separated.
heel&toe is double clutching a downshift while braking. This allows for a smooth engagement and not to upset the balance of a car while entering a turn. This technique applies to syncronized and non-syncronized transmissions.
@interpret4u I see your point and you're right when you say that without dbl-declutch trans revs don't match engine revs, but don't forget that, INSIDE the gear, you have one shaft that revs with the engine, and ONE that revs with the wheels. So you have approx only "HALF of gears" that "depend on the engine". >>>
@Losna61 >>> More: engine's inertia and wheels+diff+transmission shaft inertia are much greater than "half gears" inertia. When downshifting under severe braking, the main problem is not "keeping the gears/syncros happy"but "avoiding rear wheels lock". Which can be obtained by "simple" heel and toe. One more thing: the above is not referred to dog-gears, which require dbl-declutch. By the way, i appreciate dbl-dec downshifting, I often do it.
@interpret4u Another way to put it: simple heel and toe is required to prevent wheel locking, partially minimizing engine's inertia on the transmission. Dbl-declucth is even better, as it minimizes TOTALLY ALL the inertias, including half of the gear inertia, left out with simple H&T. But I'm willing to admit that some heavy bulky gears coupled with very torquey big engines may benefit a lot from dbl-declutch (trucks and dangerous rectiles like Cobras and Vipers ;D)
You prevent your synchros from wearing out... My car has synchros, but they are tired, so i have to double clutch to revent the gearbox from blocking (my gb locked my front wheels on my previous car, and i crashed....)
I'm surprised they don't teach this in driving schools anymore :/
It's a very handy procedure even in normal driving sometimes. It's funny hearing someone driving up a hill in a car with a big load and running out of puff. Then they make a rough downchange to get back in the torque curve but the car still struggles a bit. Double de clutch it!
It's handy too when you need to overtake someone quickly on the highway, without a really brutal, sudden jump in revs.
Good ole double de clutch
MrHellyeah2010 4 months ago
1:03 isnt that a toe-toe version? =)
Ebiiichu 4 months ago
Nice driving mate! Makes me remeber when i was learning dcht when i was 18 yr old in my toyota corolla 92, sweet times on the roads in stockholm. Don't have a car right now, i'm studying so I have to watch these videos instead :P I will put up a video of me doing this if i get the chance though :)
Polishsebbe 5 months ago
this is hard if you have no coordination. Once you learn it, downshifts can be performed earlier and smoother for sure. i can do it ,just not as fast as porfessional race car drivers.
hasido16 6 months ago
What are the dis/advantages of double de-clutching?
stevenscottoddballz 1 year ago
I have a 172 and a 911 Carrera. On trackdays, Double declutch H/T downshift is more or less obligatory with a 911 fitted with a type 915. Its has pedals well suited for it. Can't say the same for my 172, despite the ally pedals, the brake and gas pedals are too far apart. The technique's used to smooth out the change to keep chassis balance and its quicker than synchros, at least on old 911's
SilentWingz 2 years ago
why are you double de clutching when your gearbox has syncro? your gearbox is already syncronized. i've never seen HT and Double Clutching used together before.
125zetecs 3 years ago
I know it has a syncromesh...it's a driving technique I thought I'd have a go at.
Also, to double de-clutch you have to rev the engine with the clutch up in neutral, so you naturally have to heel/toe if you're on the brakes when you do it.
I'm not sure how it would be possible to do it without heel and toeing when you're on the brakes?
MarkCup70 3 years ago 2
yeh your right, its impossible not to HT while double de-clutching on the brakes, whenever i HT i don't bother with the double de-clutch. i must try it to be honest but i don't think it will make much difference. i wasn't having a go, i was just intrigued to know why you using both techniques at the same time. good job anyway
125zetecs 3 years ago
my favorite part is the turning signal lol
justinharker 3 years ago
This comment has received too many negative votes show
waste of time unless your running a sequential box box.
dagnut 3 years ago
This video shows the proper technique to dbl-clutch a downshift.
Reving an engine while in "Neutral" gear, w/clutch pedal released, is the only time transmission gears can be matched with engine rpm.
Other videos reving while clutch is depressed are wrong and damaging.(idiot in Lotus)
Any time the clutch pedal is depressed, the engine is seperated from the transmission. Reving will only spin the engine. Choritsu-shi NomuraTuning&Design
interpret4u 3 years ago 7
Thanks man, that's exactly the question I had for a long time.I always thought why you have to switch in the neutral gear and then throttle and not just throttle when you depressed the clutch.
RockStrongoG 2 years ago
@interpret4u
I don't fully agree. It's true that dbl-declutch is the ONLY way to match gear speed and engine speed, but this is necessary ONLY with not-sincronized transmissions.
Racers with sincronized transmission use simple heel&toe downshifting, cause they're interested in matching engine speed and rear wheels' speed, to avoid rear wheels locking under severe braking. You can see both tecniques under "Punta tacco - heel & toe" and under "Heel and toe double declutch downshifting". ;)
Losna61 1 year ago
@Losna61 You and the racers are wrong. There's no such thing as, simple heel&toe downshifting. You may think that it works, but it's IMPOSSIBLE to match rev any engine and transmission while the clutch pedal is pushed down... they're both separated.
heel&toe is double clutching a downshift while braking. This allows for a smooth engagement and not to upset the balance of a car while entering a turn. This technique applies to syncronized and non-syncronized transmissions.
interpret4u 1 year ago
@Losna61 You and the racers are wrong. There's no such thing as, simple heel&toe downshifting. You may think that it works, but it's IMPOSSIBLE to match rev any engine and transmission while the clutch pedal is pushed down... they're both separated.
heel&toe is double clutching a downshift while braking. This allows for a smooth engagement and not to upset the balance of a car while entering a turn. This technique applies to syncronized and non-syncronized transmissions.
interpret4u 1 year ago
@interpret4u I see your point and you're right when you say that without dbl-declutch trans revs don't match engine revs, but don't forget that, INSIDE the gear, you have one shaft that revs with the engine, and ONE that revs with the wheels. So you have approx only "HALF of gears" that "depend on the engine". >>>
Losna61 1 year ago
@Losna61 >>> More: engine's inertia and wheels+diff+transmission shaft inertia are much greater than "half gears" inertia. When downshifting under severe braking, the main problem is not "keeping the gears/syncros happy"but "avoiding rear wheels lock". Which can be obtained by "simple" heel and toe. One more thing: the above is not referred to dog-gears, which require dbl-declutch. By the way, i appreciate dbl-dec downshifting, I often do it.
Losna61 1 year ago
@interpret4u Another way to put it: simple heel and toe is required to prevent wheel locking, partially minimizing engine's inertia on the transmission. Dbl-declucth is even better, as it minimizes TOTALLY ALL the inertias, including half of the gear inertia, left out with simple H&T. But I'm willing to admit that some heavy bulky gears coupled with very torquey big engines may benefit a lot from dbl-declutch (trucks and dangerous rectiles like Cobras and Vipers ;D)
Losna61 1 year ago
you got a nice pair of gloves :)
yuyueyuyue 3 years ago
It's not about the engine. Double de-clutching helps the gears engage.
Yes, modern 'boxes have a synchro, but when I do this, the gears always engage easier, more smoothly.
MarkCup70 3 years ago 2
@MarkCup70 Agreed, my clio is exactly the same. Much smoother shifting to neutral rather than keeping the clutch in.
mysteryskatedecks 1 year ago
unless you really, really care about ur engine, double decluthin is pointless isnt it?? heel toeing is enough?
showusurbeaver 3 years ago
You got to teach me when i come over!!!
Tomstrugnell 4 years ago
Cool pedal action... what exhaust/filter does your car have? it sounds rather nice :D
nickelises 4 years ago
whats actually happening, i do this at traffic lights because my feet are too big and fit across both pedals.
surly it takes longer to press the cluth twice than once and lash it in gear with a bit of force?
man3ack 4 years ago 3
Nice Footwork +2
J90lude 4 years ago
Whats the difference btw heel-toe and de-cloutch???
Thx
Luccap 4 years ago
i think its the same
hboyce4 4 years ago
*NEWSFLASH*
Now Included free with your IAM Box-A-Tricks - the new double de-clutching gearbox from Renault, with added synchro's for extra pleasure.
At the all inclusive price of £399
Bargain at 1/2 the price
;-)
/y0z
y0z2a 4 years ago
LOL exactly. Can't see why people still double clutch when they have synchros... they obviously don't know what they're doing it for!
mintyhinton 4 years ago
You prevent your synchros from wearing out... My car has synchros, but they are tired, so i have to double clutch to revent the gearbox from blocking (my gb locked my front wheels on my previous car, and i crashed....)
2005pierric 3 years ago
Heel and toe helps the clutch and car balance.
Double de-clutching can help the gearbox along too.
MarkCup70 4 years ago 2
Well I know for what we do the heel toe, but what for de Double cluthh is???
faocruz 4 years ago
I do it, after training 3 months... started with heel toe, and then, double clutch is easy ;)
2005pierric 5 years ago
how many years has it taken you ;-)
*runs*
/y0z
y0z2a 5 years ago
nice one mark, been trying this myself, aint easy.
b0t13 5 years ago