Keyser_Soze

Hay you all, I typically just drive in D, excpet when i'm driving a bit agressive i hold the gears using the touch shift, specially on the highway where in tends to go into over drive....i like to hold it in 4 if i'm playing with someone....

here is my question....
me and my friend which he has a tweeked IS 300 were runin each other just for fun on a empty road ofcourse....and i just come to realize when you really try to get everything out the car...it gets a little more complex...

First Run) I tried to use the touch shift, but when you flooring it if you just tap two seconds late...it shifts on its own then you ending up skipping a gear (i.e. jumpin from 1 to 3)....

Second Run) I just put in D and floored it....no way hosay

Third I havn't tried but heard someone talking about it....:
Put it in 1 and floor it and let it shift for you?! Is the best way to run the car as fast as it can go?!

also i do use the botton under the pedal when i'm driving and i have found out its best when i 'm in D and want to rev the engin and instead of using the touch shift just floor it and let it kick down....but agian going back to the 3rd choice above when you wanna run hard do you:

1 - Put it in 1 floor it just before you push the botton

2 - Put it in one floor it push the botton in and then lift it just a little so the botton is not depressed

3. - Put it in one floor it and hold the botton in?!

Any help will be appreicate it...


by the way my buddy SMOOOOKED me ....we knew its gonna turn out that way ...but want it to have fun anyway (or at least he did haha)

KOMPRESSORnSC

...isn't worth much, I know, but here goes!

I swear the fastest way to shift the auto is to breathe it when you hit about 5400. If you do it right (takes some practice), you're off, back on, and in the next gear at 3800 or so. Just pulls like an SOB at that point. Letting it shift on it's own or using the TS just drops the RPM too much going into the next gear. It will actually snap your head when you get it right.

I imagine it's like what the manual feels like, but I wussed out and got the auto.

nevide

I don't understand your post. If you want the quickest gear shift, just floor the pedal until the button is pressed. If you want the optimal launch, the best way is to put it in drive, hold the brake with your left foot, turn off the ESP, make sure it's on summer/sport mode, rev it until 2500-3000 depending on preference, and release the brake. It's gonna launch as hell and I usually just floor the pedal with the button pressed all the way till you've had enough.

phattbam

what is this button that you are talking about? is it under the gas pedal? do all c classes have this? I heard that the leave it in 1st and let it shift when it gets close to redline is for '03 and up, so for all those who do it was built in, i do that to the c240 loaner i get all the time.. it moves.

JeT

Push the accelerator pedal in all the way until you hear or feel a click.

phattbam

sorry to ask but what does that do for the car? does it make it shift more aggressively?

GDawgC220

optimal gear holding is done by leaving it in first and let it upshift automatically for u when the car hits redline. From what i know, it has a protection feature built in so that when you do hit redline and are manually changing gears, it will upshift for you incase you forget to shift, its designed to protect the tranny and engine to prevent damage. So, IMO, it's the best way to get power out of all the gears the longest.

Give it a try, leave it in first and hit redline, it should shift for you automatically.

KOMPRESSORnSC

I have to disagree. Look at a dyno. You're going to peak hp around 4100, and it slowly drops off from there, with a big dip coming around 5500. Between 5500 and 6200-6400 (where it acutally shifts), your hp is dropping rapidly, My max was 172.3 hp, and right before it 'auto' shifted, I was under 150 hp. Holding a gear just becaue you're at a higher RPM does no good if the engine isn't making the power. It also takes forever to shift becasue the RPM's have to drop further to grab the next gear.

GDawgC220

Thanks for the info, but I have a question then. Why the Pro drivers at the C-Spot party with the C32's, they don't shift at 4100RPM's or where ever the peak is? They just let it rip from 1st gear till redline as they say "to get max power out of each gear"?

GDawgC220

oops..forgot, also it doesn't shift right at redline I believe, I think there is a fuel cutoff point before redline (around 5600 RPMs?) where it will shift...atleast true on my car and a few C-Classes that i've driven (01+)

phattbam

that function that you are referring to, is that for cars built post 01? mine was 2001 and i was told by my service advisor that it was a new feature added to newer cars.

GDawgC220

I believe it's any model with the shift-tronic tranny..