10krpm AE86

narration is all in japanese and nothing happens for at least 1 min 30 secs...

sorry what happens?
 
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before going down each cog, to match the rpm with road speed. I don't know whats so impressive about it though, an idiot could do it. Keiichi is amazing though, fantastic skill and a fantastic car. 1.03 is real quick for a little 1.6 :D. HKS's time attack Evo runs in the 53s range there, now that is fast :eek:.
I think it is BMI - JDM Racer where Keiichi drives in some reinactment AE86 races, and set a new Tsukuba lap record in an NSX SuperGT car (51.8s IIRC), a good watch if you are interested in this, and it is subtitled ;)

also if you like high rpm 1600's then check out this one :D http://uk.youtube.com/watch?v=Rl8T9KFgjWc
 
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Saytan said:
because you're using engine braking.
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the blip on the throttle increases the rpm of the engine so it matches the road speed.

if the rpm of the engine is too low, the engine breaks the car

so if you want to change to 3rd at 40 mph and your revs are at 2k, then the engine will break, so you blip the throttle, so that the rpm is higher to stop the engine slowing the car

but if you change to 3rd when you are going slower, 30mph then your engine being at 2k rpm will not slow the car at all.

that's what i meant

or do i have something confused here?

oh sorry you want the engine to help break...

but won't the engine break you more if it's spinning at lower rpm?
 
Clarkey said:
why would you want to let the rpm fall when on a time attack lap?
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i don't know, i'm confused.

He wants the engine to help him break so he can slow down in a shorter space of time.

but he puts the revs up to do this... but don't lower revs break you more?
 
Higher revs break you more than lower revs.

Blipping the throttle makes the down change a lot smoother as the difference between the revs you're going to be at when you let the clutch back out will be closer to what they will change to as the gear goes down. E.g. say you are at 3000 revs in 3rd gear and you change down to 2nd, your revs go up to 5000. So by blipping the throttle while you have the clutch lever in, the revs rise to 5000 and as you let the clutch lever out the revs stay at a constant 5000 and it's much smoother than if they suddenly had to change from 3000 up to 5000 in about half a second.
 
Ben M said:
the blip on the throttle increases the rpm of the engine so it matches the road speed.

if the rpm of the engine is too low, the engine breaks the car

so if you want to change to 3rd at 40 mph and your revs are at 2k, then the engine will break, so you blip the throttle, so that the rpm is higher to stop the engine slowing the car

but if you change to 3rd when you are going slower, 30mph then your engine being at 2k rpm will not slow the car at all.

that's what i meant

or do i have something confused here?

oh sorry you want the engine to help break...

but won't the engine break you more if it's spinning at lower rpm?
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seems like you are trolling again but i'll reply anyway.

Its quite simple, engine braking is caused by the engines compression strokes on the overrun. More rpm = more compression strokes = more braking effect. You would think this would become blatently obvious pretty quickly to anyone who has driven a manual car.

The sudden and large braking effect on downshifts without rpm matching is not really engine braking so to speak, well it is, but it is caused by poor technique. Do that while you are at the limit of the tyres grip in a corner and the sudden braking effect on the driven wheels will cause the tyres to exceed the limit of grip, making the car slide. In a FWD it will tend to induce understeer in most cases. In a RWD it has the same kind of effect as yanking the handbrake, the rear will step out, it is a technique used in drifting known as the shift lock.

As for this
but if you change to 3rd when you are going slower, 30mph then your engine being at 2k rpm will not slow the car at all.
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If you slow down more in 4th, when you shift to 3rd there is still an rpm difference which needs to be overcome on the downshift, only it is smaller when at low rpm, you can get away with it on low speed downshifts by slipping the clutch and it gives a smooth transition but it wears out your clutch.
RPM matching on downshifts is beneficial pretty much all the time, heel-toe isn't really necessary for the most part when driving on the road though, but can come in useful from time to time. It isn't hard to do, but you will find it difficult to start with, pressing the brake pedal hard by accident when blipping the throttle for instance, but practise makes perfect. This isn't so much of an issue when you are allready braking very hard though like you would be on track. Anyhow, it is far easier to master than left foot braking :eek:
 
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