i know fast and furious isnt the most accurate movie but i dont get why vin diseal says paul walker shouldve been double clutching wen he was racing. why does he say that?

double clutching.....you shift hit the clutch again shoot up the rpms and let go again give gives you a boost

or you let the anti-lag, clutch cut, or no-lift-to-shift option on your engine management system, "like you should" do it for you.

anti-lag and those other options actually retard ignition timing, enrich fuel, and blow fireballs through your turbo to maintain boost without practicing what big rig drivers do. key in an actual race :thumbsup:

by doing that your turbo will not last more then 2 race. then 1) rebuild or 2) buy a new turbo.

why? if it's a knock off maybe, otherwise this doesn't hurt the turbo more than a lean pull.

if you pull timing 20* you can expect more than the turbo to **** out, but if you pull 8-10* and enrich somewhere from 0-5% the turbo will last longer than the engine on a small one.

how much timing and enrichment depends on the turbo, build, etc

the true miss firing system will destroy turbo easily. much like in the WRC.

I was under the impression that double clutching in the simplest sense was clutch in, release the gear, clutch in again, engage the next gear. The idea is to manually control the RPMs instead of letting the synchros do it. Its better for the transmission, plus, shifting with a standard manual tranny at high RPMs is really difficult, especially from first to second in my experience, cause the synchros can't keep up. Whenever I tried at over 6k RPMs, It would never go straight into second, had to try a couple times or force it, where double clutching it goes easily cause you've already matched the tranny and engine speed...
I do have a GS, so the tranny might not be as good, and I might be way off here... I just do it when I'm pulling hard to save the synchros and make shifting easier.

in WRC, yea, I can see how it will destroy the turbo because of the number of times it's used and the small size of the turbine housing/wheel

In terms of drag racing it is used for about 4 seconds (at the very most) after deep stage and then 2-3 times at each shift. The turbos are also large frame and can handle the stresses better.

+1 i thought the same thing. to rev match while shifting normally so the trans doesn't have to adjust to catch up. Less delay from gear to gear when racing.

double clutching would be like he said clutch out of gear clutch into gear it gets your flywheel moving faster so you get easier into gear and engine is up to speed with tranny... but the time it takes to do this over just going into gear will cost you about .2-.5 on the track mayeb more.

engine management systems like AEM and DSMLink have another option called NLTS (no-lift-to-shift). It actually came stock on the '04 srt4's.

it works just like it says, when you go to shift just keep your foot on the floor, the ECU will hold the RPM until you let the clutch back out.

Pwee thats still not "double Clutching"

Like everyone else has stated its when you clutch in gear out rev match shift.

It is 100% useless on a synchronized transmission. UNLESS a synchro is bad.