[dmachine22]

What the hell is the difference and which one would be best for racing at the track my first manual was a 5.0 5spd 1993 and I learned pretty easy and now i have a 99 5spd gt and this is over the span of 8 months of expirence so i'm not real familiar with those terms I know what granny shifiting is and I know it saves the transmission so i heard better than the other two but still with the tracks opening here in about a month and this will be my first time at a track I can launch the car 80% of the time right, than from there I just quickly switch thru gears but would power shifitng or double clutching be a better option?

[97Cobra]

power shifting is not even taking your foot off the gas just hittin the clutch n shifting real quick.....hard on trannys! granny clutching is taking you foot all the way off the gas pushing the clutch in n shifting......

[SWEET2KSTANG]

double clutching is pretty much what it says it is. i powershift and as for times will be faster as long as you can plant the power. it will be hard on the trans (i am on trans #3) but its all up to you.

[dmachine22]

Originally Posted by SWEET2KSTANG double clutching is pretty much what it says it is. i powershift and as for times will be faster as long as you can plant the power. it will be hard on the trans (i am on trans #3) but its all up to you.

Thanks for the tip I only plan on racing at the track so hopefully it wont mess up my tranny 2 bad

[White99stang]

quit watching fast and the furious there homie, powershifting is like an artform and its hard to do it right, doublt clutching is stupid, i say just try to get your car down the track in one piece and gain experience and everything will start coming into place. The problem with breaking trannys when powershifting is all about clutch dissengagment, a big part of that is the adjustable cutch cable, quandrant. The stock one actually flexs at the firewall so your not getting full cable release and the clutch stays partially engaged while trying to shift. Call promotion powertrain and talk to Walt and order on of there quadrant and cables. Theirs are used in cars running low 9's with a 5 speed. I just ordered it plus all of there stuff for inside my T-45 to handle 500hp and being able to shift at 7000rpms

[dmachine22]

Actually I got this from a subaru forum and I always wandered about the difference, i heard double clutching is for semis n e way but I was more wandering if I should power shift or regular shift?

[Casper98GT]

white youre the MAN. I saw this and almost died laughing.

The entire movie was a joke and it should have NEVER been made, even if it had Mustangs in it and nothign else. Nothing was technically correct.

Why would you need to double clutch when youre racing unless you have some old piece of crap transmission or youre syncros were bad.

Power shifting you can do, but like everyone else said its hard on youre tranny and driveshaft and rear end. I do it 2nd, 3rd, and 4th. But never from 1st to 2nd because i would spin sideways and crash. Unless im running my DR's.

And i have my stock tranny still even when PS's on DR's.

Goodluck!

[ReverendDexter]

Double clutching is only for transmissions without syncros. As long as you can rpm match (yes, both up and down), you're fine.

I don't suggest it, but a good way to get a feel for what rpms you need for rpm matching is to try hotsticking the tranny (shifting w/out using the clutch at all). I suggest trying this first on the upshift. Just take first out a little higher than you usually do, then, just pull back on your shift lever, pressing against the gate for 2nd. When the rpms are right, it should drop into gear. A little practice, and you should start being able to do it up and down. Again, not something I suggest you do, but it is an option.

[TheUNZippee!]

Double clutching is done in trannies without synchros as revdex says.Such as in a tractor trailer, which I drive. It means you step on the clutch twice, and is not for racing. As you step on the clutch the first time, you are moving the shifter out of it's present gear. Then you release the clutch. Then you step on it again, moving the shifter into the next gear as you do so.

Power shifting is done by keeping the accelerator floored, and without taking your foot off it, you bang the clutch to the floor while you are simultaneously moving the shifter, so that you are making the gear change at the instant your clutch pedal is hitting the floor.You don't hold the clutch pedal down for even an instant, you just bang it down with your foot and release while you move the shifter at the same time.
It takes practice, and the key here is to WATCH your rpm's, especially if you don't have a rev limiter.The whole idea is that the shift is accomplished far faster, which means when you engage the next gear, your engine will not have dropped as much rpm, meaning you are higher up in the powerband where you have more horse,which equals better acceleration.
It's harder on equipment, but if you are drag racing, you aren't using your car for longevity.

[csredfire07]

Just courious, what rig in this day in age needs to be double clutched? I have both Eaton 8LL and 15 spd and I only need the clutch for going into firest and reverse. Double clutching is from the early 80's and before. Remember quad boxes?

[dmachine22]

Originally Posted by TheUNZippee! Double clutching is done in trannies without synchros as revdex says.Such as in a tractor trailer, which I drive. It means you step on the clutch twice, and is not for racing. As you step on the clutch the first time, you are moving the shifter out of it's present gear. Then you release the clutch. Then you step on it again, moving the shifter into the next gear as you do so. Power shifting is done by keeping the accelerator floored, and without taking your foot off it, you bang the clutch to the floor while you are simultaneously moving the shifter, so that you are making the gear change at the instant your clutch pedal is hitting the floor.You don't hold the clutch pedal down for even an instant, you just bang it down with your foot and release while you move the shifter at the same time. It takes practice, and the key here is to WATCH your rpm's, especially if you don't have a rev limiter.The whole idea is that the shift is accomplished far faster, which means when you engage the next gear, your engine will not have dropped as much rpm, meaning you are higher up in the powerband where you have more horse,which equals better acceleration. It's harder on equipment, but if you are drag racing, you aren't using your car for longevity.

Yeah thanks i've been hearing alot that it does improve acceleration but is also hard on your tranny as well and you have 2 get used to it so practice makes perfect im just trying to get the best out of my 1/4 mile as possible when I head 2 the track thanx!

[matrixpuba]

remember liftin aint shiftin lol

[TheUNZippee!]

+1 matrix

Yeah like I said dmachine, it can be hard on equipment, but dragging your car is harder on everything involved, so whatcha gonna do. Breaking shit is part of serious racing.
Good luck at the track & have fun learning!

[ReverendDexter]

Originally Posted by TheUNZippee! Breaking shit is part of serious racing.

Which means no serious racing in your daily driver! (or in my case, your girlfriend's daily driver )

[dmachine22]

Originally Posted by TheUNZippee! Power shifting is done by keeping the accelerator floored, and without taking your foot off it, you bang the clutch to the floor while you are simultaneously moving the shifter, so that you are making the gear change at the instant your clutch pedal is hitting the floor.You don't hold the clutch pedal down for even an instant, you just bang it down with your foot and release while you move the shifter at the same time. It takes practice, and the key here is to WATCH your rpm's, especially if you don't have a rev limiter.The whole idea is that the shift is accomplished far faster, which means when you engage the next gear, your engine will not have dropped as much rpm, meaning you are higher up in the powerband where you have more horse,which equals better acceleration. It's harder on equipment, but if you are drag racing, you aren't using your car for longevity.

I tried it yesterday going from first to second and it scared the hell out of me lol because I did not do it fast enough and the rpm gauge jumped and then I landed in to secound and the back end went sideways on me it will take a little practie but ill get it I like the quicker power it gives by not letting the rpms drop so much I feel like i'm learning how to drive a manual again!lol

[Trick Tuners]

Practice at lower rpms before doing WOT redline power shifts for your first time. Maybe at 3500 instead till you get it down, but be careful not to break anything!

[dmachine22]

Originally Posted by Jgorm Practice at lower rpms before doing WOT redline power shifts for your first time. Maybe at 3500 instead till you get it down, but be careful not to break anything!

yeah I know I should of done that my first time but actaully it just goes right into gear without any hesitation at all when I power shifted I figured I would have to jerk it in there but my clucth is only 2 1/2 months old so it went in real easy thanx for the tip!

[TheUNZippee!]

Glad you're having fun, dmachine. It's not so hard to pick up with a little practice. Just remember once you get good at it, to not get complacent & always focus %100, cause that's usually when you start breaking shit. Not that I've ever done that. *cough*
p.s. What your gf doesn't know won't hurt you. lol

[dmachine22]

lol