couldn't have said it better myself.

 

I find no fault in that statement: you can indeed properly match in that way, but it's not the most efficient way.

I completely understand what you are saying: the engine will drop in speed to its idle state, so as long as you rev past the speed you need to match, and assuming this speed is above idle, then at some point you must pass the exact target speed and can complete the gear change.

However, the less precise you are, the more time lag (between throttle input and gear change) you introduce here. The more lag there is, the more the target drops from when you first attempted the shift, and hence even more lag is introduced. Eventually, the imprecise revving is going to either cost you real time as your wait for the engine to slow down (this does not happen as fast as one might think on a 9k rpm engine) or force an early gear change.

Now, I agree that the penalties we are talking about here are minuscule compared to the effects of inaccurate brake modulation, so that is unquestionably the more important of the two. However, there is something to be said for a perfect double clutch downshift that you can immediately let the clutch out on. At the limit, it can stop you from losing time as described above, as well as increase your stability in hard breaking zones. It's one of the last things I would work on to go faster, but in a thread specifically about Heal Toe on R&C I think its worth discussing the best technique instead of the one that will just get it done.

 

I use my heel to blip the throttle and the only hesitation I have is the amount of time it takes for me to push in and release the clutch. I can rev match with my heel, but with anything I'm not always perfect. Precise brake modulation is more important to me, so I'll reserve my toes for that task.

 

It just boils down to what you are more comfortable doing. Everyone is different.

 

double clutch is faster than waiting for the revs to drop? I donno if I believe that.

I don't heal toe. I "ball roll" and I'm precise on both pedals. In the s2k you need to bend the gas pedal a bit to make it work better, but I can do it on a stock s2k too.

 

Heal?

 

Definitely, all methods seem to work with some practice. I read about heel toe first without seeing anyone do it and assumed it was heel on the brake. Then I had some instructors at Skip Barber show me ball of the foot method Rylan is talking about. Then I got in some cars were the pedals were spaced such that the more traditional toe on the brake was the only comfortable and consistent way. I still prefer the original way I learned, but I completely understand people who are more comfortable with the others.

[QUOTE=krazik,Jul 22 2010, 05:34 PM]double clutch is faster than waiting for the revs to drop?