View Full Version : Why Powershift?


hatrickstu
02-04-2006, 12:35 PM
Hey i have been to the track a number of times in my ss and have run pretty well, see sig for times. I have expiremented with powershifting and it does not do very much good in our cars IMO, so what is the big deal with everyone on here bragging about how they powershift so well?

djpatrick35
02-04-2006, 12:45 PM
That's because it can take some time off, but you also run the risk of dropping your tranny. A friend of my dad's dropped a freaking ME-22 Rock Crusher! on his '69 Camaro while he was powershifting. That's why you'll never see me mess with it...Can't even afford a full-out SS, let alone a new tranny!

05_Blue_B10WN_SS
02-04-2006, 01:33 PM
This may sound dumb, but what is powershifting? How do you even do it? When i race i just stomp the gas till it gets near redline, let off the gas, switch gears, and nail the gas again, and repeat so till done.

Cobalt443
02-04-2006, 01:36 PM
This may sound dumb, but what is powershifting? How do you even do it? When i race i just stomp the gas till it gets near redline, let off the gas, switch gears, and nail the gas again, and repeat so till done.


it would be doing the same thing but with out letting off the gas

codyss
02-04-2006, 02:35 PM
I have never power shifted any car I owned.

This leads to more problems than better numbers.

Just learn to shift faster.

mi6_
02-04-2006, 02:40 PM
Hey i have been to the track a number of times in my ss and have run pretty well, see sig for times. I have expiremented with powershifting and it does not do very much good in our cars IMO, so what is the big deal with everyone on here bragging about how they powershift so well?

Agreed. In my own experience, as well as what I have read from professional drivers, conducting a simple, clean shift often produces the best times on a track. If you are trying to shift really quick (or powershifting) you may actually be loosing time. You also run the risk of damaging driveline components if you are not doing a good job.

Darksun
02-04-2006, 02:56 PM
This may sound dumb, but what is powershifting? How do you even do it? When i race i just stomp the gas till it gets near redline, let off the gas, switch gears, and nail the gas again, and repeat so till done.

As far as i know
Power shifting = Going into next gear WOT no clutch. Not a good idea for us some cars get special trannies and other things to do this

WOT shifting = using clutch to get into next gear but never taking foot off throttle.
I use this only for 2-3 shift If im scraping during a race and the 3-4 shift its mandatory for me. Tranny can take it but I wouldn't do it all the time only if its a really close race and you need to do somehting else to try and win. For me boost stays peged at 16.5 psi going into the next gear which is always a good thing. When i try it at the track though the tranny seems to hate it. Maybe because theres more grip so all that backlash is going into the drive train.

hatrickstu
02-04-2006, 04:28 PM
no power shifting and WOT shiftinga are the same thing... its just never letting off of the gas

GotBoost?
02-04-2006, 04:35 PM
i dont get how this would help, if you went to almost redline, and then shifted without letting off the gas, wouldnt that make you hit the rev limiter? Seems like it would slow you down to me....

Darksun
02-04-2006, 05:03 PM
i dont get how this would help, if you went to almost redline, and then shifted without letting off the gas, wouldnt that make you hit the rev limiter? Seems like it would slow you down to me....
whenclutch is down its like being in neutral so your not technically accelarating any more. But our cars when you push in the clutch underwide open throttle the rpms jump 1-2 hundread rpms so if your not carefull the car will go into a fuel cut on you.

05_Blue_B10WN_SS
02-04-2006, 06:37 PM
i dont get how this would help, if you went to almost redline, and then shifted without letting off the gas, wouldnt that make you hit the rev limiter? Seems like it would slow you down to me....

Thats the exact same thing i was thinking. I've never even heard of powershifting untill i read it on this forum. I would imagine you'd be bouncing off the revlimiter a lot. I mean, shifting quickly while letting off the gas will keep your rpms up. The car will squak it going into 2nd easily... Judt dont see how power shifting helps... and if it does it must be a minimal time advantage.

Brian MP5T
02-04-2006, 07:06 PM
Because it's a cool thing to say at the track as you are being Eye Fucked by all the hot 15 Year old girls.

Tofu
02-04-2006, 07:40 PM
Power shifting typically nets me around .2 tenths, I don't ever recommend doing it on a consistant basis (power shifting on all your runs) especially if you aren't patient enough to let your car cool down. The concept of power shifting is simple, if you do it right, you take less time to shift into gear and also the rpm's will not drop as much as "granny shifting" so you're in your powerband already.

RedBaseBolt
02-06-2006, 09:08 PM
Because it's a cool thing to say at the track as you are being Eye Fucked by all the hot 15 Year old girls.


:twothumbs

Waylin22
02-06-2006, 09:13 PM
dont power shift if you like your tranny in working condition :)

BullDog71ss
02-06-2006, 10:27 PM
If done right it'll shave track time and the only thing it'll do is add a bit of extra clutch wear.

I'll make a vid of me doing some runs through the gears while granny shifting, then powershifting and you guys can see the diff.

MacG321
02-06-2006, 10:31 PM
i hope powershifting isnt bad because whenever i have raced anyone on the street or track or just floor it for that matter i powershift (shift gears without lifting off the throttle). As long as you do it right, you should be perfectly fine.

p7x
02-06-2006, 10:40 PM
i hope powershifting isnt bad because whenever i have raced anyone on the street or track or just floor it for that matter i powershift (shift gears without lifting off the throttle). As long as you do it right, you should be perfectly fine.

doesnt matter if u do it "right', it's still hard on the clutch and the tranny.

Tofu
02-07-2006, 12:19 AM
Bottom line, if you want to play you've got to pay. Don't do it if your concerned about breaking something.

mi6_
02-07-2006, 03:14 AM
As long as you are rev matching when not using the clutch, it is not really doing much to anything. There is more load than normal on the transmission, but nothing it shouldn't handle. If the clutch stays engaged by rev matching, there is no way you are causing extra wear. It will be hard on the tranny if you rev match poorly and are grinding gears!

You people burning up clutches are doing it by launching too hard. That is where the real wear is on the clutch. When launching, keep it to 2000RPM, and ease off the clutch, don't just dump it. If you are shifting with the clutch and not lifting at all, you are always causing major wear because the clutch has to slip ~2500RPM everytime you re-engage it. If it is always engaged, there is no more additional wear to it when power shifting.

In my opinion, unless you are very good at shifting your car clutchless, it is best to lift a little and shift using the clutch. You will probably shift just as fast (likely faster) than you would making a crappy powershift, and you would be avoiding major transmission damage. If you are going from second (6500RPM) to third (~4100RPM) you should ease off to about half throttle, allowing the revs to drop lower as you re-engage the clutch, making the clutch slip less because the revs are closer and you are also being easier on the synchromesh gears.

When you get good at shifting smoothly, you will put out just as good times. Destroying your drivetrain by trying to fast instead of smoot will get you nowhere! Dragging requires finesse, not brute force.

astrocrep
02-07-2006, 09:28 AM
Do you gets hit the rev limiter when you power shift?

I don't do it often... but when I do...

For a split second between shifts... the tach will jump into 6800 or 6900 rpms... no revlimiter on that...

-Rich

BullDog71ss
02-07-2006, 01:14 PM
Do you gets hit the rev limiter when you power shift?

I don't do it often... but when I do...

For a split second between shifts... the tach will jump into 6800 or 6900 rpms... no revlimiter on that...

-Rich

If you do it right you won't hit the limiter, if you miss the gear you will hit the limiter. Accuracy and speed are key.

As long as you are rev matching when not using the clutch, it is not really doing much to anything. There is more load than normal on the transmission, but nothing it shouldn't handle. If the clutch stays engaged by rev matching, there is no way you are causing extra wear. It will be hard on the tranny if you rev match poorly and are grinding gears!

You people burning up clutches are doing it by launching too hard. That is where the real wear is on the clutch. When launching, keep it to 2000RPM, and ease off the clutch, don't just dump it. If you are shifting with the clutch and not lifting at all, you are always causing major wear because the clutch has to slip ~2500RPM everytime you re-engage it. If it is always engaged, there is no more additional wear to it when power shifting.

In my opinion, unless you are very good at shifting your car clutchless, it is best to lift a little and shift using the clutch. You will probably shift just as fast (likely faster) than you would making a crappy powershift, and you would be avoiding major transmission damage. If you are going from second (6500RPM) to third (~4100RPM) you should ease off to about half throttle, allowing the revs to drop lower as you re-engage the clutch, making the clutch slip less because the revs are closer and you are also being easier on the synchromesh gears.

When you get good at shifting smoothly, you will put out just as good times. Destroying your drivetrain by trying to fast instead of smoot will get you nowhere! Dragging requires finesse, not brute force.


You're on a whole different topic dude. We are talking about shifting gears while depressing the clutch, but not lifting off the gas. What you're talking about most people don't even know they can do. Also, our tranny won't shift fast without using the clutch, I drive around town without clutching, but I would never try to race like that.

mi6_
02-07-2006, 05:23 PM
If you do it right you won't hit the limiter, if you miss the gear you will hit the limiter. Accuracy and speed are key.




You're on a whole different topic dude. We are talking about shifting gears while depressing the clutch, but not lifting off the gas. What you're talking about most people don't even know they can do. Also, our tranny won't shift fast without using the clutch, I drive around town without clutching, but I would never try to race like that.

If you read my post more carefully I am talking about all types of shifting, including full throttle shifts while depressing the clutch:

If you are shifting with the clutch and not lifting at all, you are always causing major wear because the clutch has to slip ~2500RPM everytime you re-engage it.

I agree too that I see little advantage in driving the car clutches at the track. The throws are fairly long in my opinion (despite GM's claim of a "short-throw), so you'd need to be pretty damb good to shift without your clutch while rev-matching.

BullDog71ss
02-07-2006, 05:29 PM
If you read my post more carefully I am talking about all types of shifting, including full throttle shifts while depressing the clutch:


Yeah, but I just didn't understand why you brought up the issue of trying to race without using the clutch. Because that hadn't been mentioned AT ALL in this entire thread untill you did. Also, I doubt many of the people here know how to do that anyway.

I'm not calling you an idiot or anything, I just wanted to try and clear up some confusion and to make sure everyone is still on the same page.

mi6_
02-07-2006, 06:24 PM
Yeah, but I just didn't understand why you brought up the issue of trying to race without using the clutch. Because that hadn't been mentioned AT ALL in this entire thread untill you did. Also, I doubt many of the people here know how to do that anyway.

I'm not calling you an idiot or anything, I just wanted to try and clear up some confusion and to make sure everyone is still on the same page.

No problem. Wasn't trying to be rude or defensive if thats how you took it. Just wanted to add some other things about shifting to the debate that hadn't been brough up like you said.

:cssNET:

Put name here
02-10-2006, 04:23 PM
Borrow someone else's car or a rental and try it. :lol:

Thank goodness for rev limiters!

giovanhalen
02-13-2006, 09:07 PM
You cant' really pull your shifter out of gear unless you let up a little on the throttle, wait until the engine quits pulling or use the clutch, and then if you jam it into the next gear with the throttle floored you aren't doing your synchros any favors. In the old days guys would remove every other tooth off of their synchros so they could power shift. Then they would let off the throttle just for a split second and back down and pull the shfter form one gear to the next and their shifters were better for doing this than on a fwd car. A vertigate shifter on a muncie M22 is a lot better feeling shift than what we have. Actually even if you use your clutch to shift, if you apply power before you have the clutch all the way back out you are technically power shifting. Look at airshifted motorcycles, when they push the button the ignition interrrupts for a moment and the torque is broke so that the air shifter can pull the shifter out of gear and pop it in the next as the ignition is brought back and power applied.

BlackSS05
02-13-2006, 09:26 PM
About powershifting and damage to the car. I had a 03 CTS that was stick and i powershifted. first car i learned how to do it in. after about 20k miles the rear end blew. now with my ss i will only do it if im racing. there is no reason to put the stress on your tranny. i had to learn it kind of the hard way. caddy paid for my new rear end seeing as you cant really race a CTS lol even tho i did. the poor car. also about hitting the rev limiter if you do it right you wont hit it just be careful going from 2nd to 3rd cuz its up and over not exactly strait up. 1st to 2nd is cake cuz u just rip down hard. anotha thing i do is try to use like the whole front of my foot on the clutch and not lay it on the floor. depress it in and out really quick. you can practice that in your driveway with the car not running. try to have the gears shifted before the clutch comes back out this way you see whether or not you would cause damage to your car. something i leared at like 15 cuz i wasnt allowed to drive and i would act like i was driving stick.

leviticus88
02-28-2006, 02:22 AM
I havent tried powershifting in my ss/sc and probably never will cuz it's hard on em but in my last car. an 02 cavi I could power shift and ended up pulling off a 17.2 at alltitude with it completely stock. Not fast with our sc's but damn fast for that car.

djblass
02-28-2006, 02:37 AM
i know this guy at my job that is a mechanic and i told him about this whole powershifting and he told me don't do it cause you mess up the clutch and basically what your doing it forcing the gear in. For example pretend the clutch is a key and it makes the door open if you don't use that key and force yourself into the door you mess up the lock and its the same thing with box and the clutch, thats also like he told me that those people that keep their foot on the clutch that also wears out the clutch lil by lil. Of course not putting in the gears in right also messes up the clutch never give it too much gas or too much clutch open the clutch wide enough so that the gear goes in smoothly and then hit gas so it doesn't pull the box, something that i do all the time is that when i turn off my car i put the emergency brake on and leave it in first gear. So if anyone try's to tow it their stuck cause it gonna mess up the whole transmission and don't forget to take it off first right before you turn on the car.:cssNET:

SSJBaku
02-28-2006, 02:41 AM
powershifting may be fun but you pay in the end, friend of mine blew clutch and grinded first and second to hell in his firebird

Brian MP5T
02-28-2006, 06:02 AM
Hmm, Clutch Go Boom...

SilverSS/SC
03-01-2006, 04:10 AM
I have always powershifted . Ive done it in the SS from day 1 when Im at the strip . I can live with the extra clutch wear for the extra .1 or 2 , I dont like seeing that boost guage falling in between shifts . On mine I just tap the clutch , and throttle on shift . Ive got so efficient in the SS , it damn near sounds like a auto going down the track . I thought I woulda broke something by now , but my pecieved drivetrain durability of the SS keeps on proving me wrong . My times coming , probably this year when my car has new found power and the abilty to hook up.

SoundinlikeAautomatic goin down the track Racing :guns: :lol:

gonzo
03-01-2006, 04:57 AM
Why powershift? Why not?:twothumbs