turbo lag??

[Duke]

Yes, that's what heel-and-toe is for, Giles. The technique I believe you're thinking of, Alta, is left-foot braking. Not only does left foot braking allow you to transition from throttle to brakes more quickly, but it allows the driver to keep the throttle on during the turn, effectively working the engine against the brakes to keep a load on it. This keeps the turbo spooled and ready for instant acceleration once the corner is past.

Obviously this is hard on the car and requires plenty of extra braking capacity (in real life).

 

[R32GTS]

First of all the pffft sound when you decelerate is the blow of valve and no it doesn't vent to the exhaust manifold,it also isn't responsible for loss of boost at high rpm.It simply opens when the throttle is backed off while on boost to prevent the gas in the pipes leading from the turbo to the intake manifold from flow back out to the atmostphere through turbo,which would in effect slow down the turbo severly thus increasing lag when the throttle is again opened(for instance when backing off the accelerater to change gear only to get back on it again once in the next gear)

 

[halfracedrift]

..... you a car mechanic R32?? lol

edit: thanks giles for the info
man do i learn alot bout cars here everyday... even now

 

[kogashiwa_kai]

As for 'Heel & Toe', the toe is on the brake, and the heel on the throttle.

As mentioned, H&T is to match the revs of the crank and the gearbox. However, a lot of racers also double-clutch along with H&T. Although it feels to have the same effect, double-clutching does help prolong your gearbox's life if heavy downshifts are done often to any manual transmission at high rpm's. H&T reduces or eliminates shock to the drivetrain depending on how good one is, but it doesn't save your synchro's.