Is it not good to skip gears? I mean like go from 2nd to 4th? As long as you rev match when the RPMs are decreasing, you should be able to catch 4th w/o much prob.... right???

 

y do u need to "double clutch"? y not just put in neutral, rev slightly to revmatch, then put into lower gear? what purpose does the double clutching action serve Vs. single clutching?

 

Based on my readings from different forums, double-clutching is what saves the transmission. Single-clutching, although rev-matched, doesn't do that. You can shift from 4 to 2, as long as you rev-match. That's the whole point of doing that. Initially, rev-matching came about because way back before they started making transmissions with synchros, that was the only way anyone could down-shift manually. Now with transmissions equipped with synchros, you can just downshift w/o rev-matching, but you will wear out those synchros fast thus rev-matching is still the best way to downshift.

 

DR-Max - why cant you just leave it in neutral and rev (w/out double-clutching)?

 

You asked him if he does alot of drifting in his max? Considering it it fwd THIS IS MISINFO! It is funny you don't even remember your own posts, that I quoted in my response!!!! & I do read the threads!

 

My pops taught me a good way to get a good feel for your Clutch's friction point and to get a good handle on how much throttle to give: take your car to an uphill incline and keep it still using only gas and clutch, no brakes. Gives you a real good feel for the friction point and how much throttle response you get.

 

It was a question.....how can it be a misinfo??? Learn english bud. When you go to the airport and read all the info signs all over the place, was it in a form of a question? Or do you have a Jeopardy syndrome going on? You say you read them but are you understanding them....that's the question. If it was a misinfo, others would have called me on it already.

 

Double clutching brings the lay shaft in the tranny up to speed up the engine. This saves wear on synchros. Its not required but it will make a two gear downshift much smoother.

 

What's wrong with heel toeing on the streets? For example, taking a right turn when the light is green. I'll be braking, and so naturally I'll want to be in the correct lower gear when I complete the turn. For this purpose, I heel toe a double clutch downshift from 4th to 3rd and 3rd to 2nd, without ever taking my foot off the brakes. When I reach the turn, I'll be slow enough to take the turn and after I complete it I will already be in 2nd gear ready to accelerate again.

 

Also a manual tranny newbie. In normal day to day driving, what RPM do you guys maintain for the best combinatin gas consumption and acceleration... is 3,000 RPM good or too high?

I'm talking in city traffic with speeds about 40mph (well, okay 60 mph)

 

One of the first things he says in these videos, in the double clutch one, is that newer cars now have pretty good syncros and double clutching isnt realy necesary. so when you say that downshifting "realy" wears out our syncros, are you sure?

 

I just follow what's on the manual regarding gear to speed range. Normal driving habit for me, I don't exceed 3k rpms on 1st to 3rd.

 

IMO, from watching those m5 driving vids, double clutching seems to put more strain on the clutch. He pops the car out of 3rd into neutral and releases the clutch. He then revs the car and pops it into 2nd. This is all done in a very fast fluid motion. He revs the car so quick and engages then releases the clutch just as fast, that it seems that its putting more wear on the clutch.

farooq-the best gas mileage u'll get is if u shift around 2k rpm. if the car starts to bog-struggles go move- then downshift one gear and accel. people get varying mileage from their tanks. i get about a 40-50 mile/tank increase if i drive shifting at 2k rather than driving like a stole it.

 

That will put no wear on the clutch if executed properly. It may wear the pressure plate and TO bearing more quicky but it will save the synchros. Wouldn't you rather change the pressure plat or TO than rebuild a tranny?