Lets talk about power shifting.
Thread Starter
Melting Slicks
Joined: Aug 2004
Posts: 2,165
Likes: 950
From: Keizer Oregon
Lets talk about power shifting.
Ok; I have heard 2 versions.
1) full throttle, shift at redline, blip the clutch/throttle and shift.
2) full throttle, shift at redline, NO clutch, just SLAM into next gear with full throttle still on!
#2 sounds like death to tranny (if it even works, I have never tried it myself)
1) full throttle, shift at redline, blip the clutch/throttle and shift.
2) full throttle, shift at redline, NO clutch, just SLAM into next gear with full throttle still on!
#2 sounds like death to tranny (if it even works, I have never tried it myself)
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Wind it up to redline. With right foot on floor bang the clutch to the floor as you shift to the next gear and the clutch foot slides off the clutch to the left just as it hits the floor. The shift is almost instantanious. Your talking hundreths of a second. Yes I have torn out many muncie's in my day but also have won many races against much stronger cars. No guts, No glory! Don't miss the gear!
Last edited by 63mako; Nov 11, 2006 at 08:22 PM.
Team Owner
Joined: Jul 2001
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by 63mako
Wind it up to redline. With right foot on floor bang the clutch to the floor as you shift to the next gear and the clutch foot slides off the clutch to the left just as it hits the floor. Yes I have torn out many muncie's in my day but also have won many races against much stronger cars. No guts, No glory!
#2 doesn't exist. If you don't go off the gas, you won't be able to get the next gear in without clutch. However, there are special transmissions that are built for that but you can't do that with a normal tranny!
There is also so called "speed shifting".
Speed shifting is shifting without clutch but off the gas... When you hit shift rpm, go off the gas and rip the gear into the next gear and the step on the gas again.
I've used both techniques.. Speed shifting doesn't give you much better ET's than grany shifting but power shifting can give you several tenths off your ET but I would not try that with 400+ HP and a stock rear end... (if slicks are used)
A stock rear won't last long with power shifting..
Last edited by GrandSportC3; Nov 11, 2006 at 08:23 PM.
Drifting
Joined: Dec 2004
Posts: 1,345
Likes: 3
Originally Posted by 63mako
Wind it up to redline. With right foot on floor bang the clutch to the floor as you shift to the next gear and the clutch foot slides off the clutch to the left just as it hits the floor. The shift is almost instantanious. Your talking hundreths of a second. Yes I have torn out many muncie's in my day but also have won many races against much stronger cars. No guts, No glory! Don't miss the gear!
The only variation is that you don't necessarily shift at redline depending upon your powerband's relationship to redline, on some engines you should shift somewhere below redline, but always above the peak POWER RPM.
It's less stressful on the engine if you have a rev limiter.....
Without one, you should have the tires under power will less than 700 RPM overrun above redline.
Drifting
Joined: Jul 2003
Posts: 1,253
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From: East China MI
If you have vacuum secondaries, keep your foot on the floor. The vacuum will keep the rpm's in check. If tou have mechanical secondaries and enough power, you will have to compensate with the throttle. If I power shift (on street tires) with the pedal on the floor, I get what Ironcross describes as "consequences". (It scares the hell out the guy in the next lane.)
Last edited by jpatrick636; Nov 11, 2006 at 09:23 PM.
Team Owner
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
I would never power-shift without a rev limiter.... I had my rev limiter set to 200 RPM above shift RPM and when I power-shifted, the RPM would only go up 200 RPM, hitting the rev-limiter while power-shifting..
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Tech Contributor
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From: At my Bar drinking and wrenching in Lafayette Colorado
One of the fun things I do on the Tuning for Beer Tours is take owners out and give them a ride in their own cars with some quick power shifting - this is a lot of fun, since most Vette owners have never been in the passenger seat of thier own car, and the sensation at WOT on the passenger side during power shifting is quite different than it is on the driver's side.... I run the shift points about 500 rpm short of redline when I do this just to make sure I don't break anyone's car. But powershifting is keeping the gas to the floor and never lifting, while doing some very quick clutch and shift work to keep the rpm from changing any more than 100 rpm between shifts. You cannot shift an M-20, 21, 22 manual tranny without using the clutch if the engine has any amount of torque - you'll never get it out of gear at WOT. The stock rear holds up to power shifting just fine as long as you're running street tires. I power shift my own car regularly (I even practice at part throttle at every traffic light...), and I've never used a rev limiter. There have been times when I've missed a shift and been truly frightened...
Tech Contributor
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From: At my Bar drinking and wrenching in Lafayette Colorado
Originally Posted by jpatrick636
If I power shift (on street tires) with the pedal on the floor, I get what Ironcross describes as "consequences". (It scares the hell out the guy in the next lane.)
Race Director
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
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Nothing more fun than a full throttle powershift. This is why I run sticks.....automatics are like driving "robocar".....no fun!
Of course now I have a G-force 5 speed...no synchros and face tooth engagement...it's just a beautiful thing to pull the handle at 7000+ rpm with 800+ HP!!
REAL Vette's have 3 pedals!!
JIM
Of course now I have a G-force 5 speed...no synchros and face tooth engagement...it's just a beautiful thing to pull the handle at 7000+ rpm with 800+ HP!!
REAL Vette's have 3 pedals!!
JIM
Race Director
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From: Taylor Michigan
Originally Posted by MotorHead
I have never done it in any car I have owned 
Winning isn`t everything, it`s the only thing. 
Team Owner
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by lars
I have powershifted jpatrick's car... this is a trip. His Vette is a 502 that's really well built. Power shifting from 1st to 2nd is a joke: It will fry the rear tires uncontrollably, and you have to ease off the throttle after the 1-2 shift. Power shifting his car into 3rd scares the hell out of the guy in the next lane (remember the cop, Patrick..?). So if you power shift, be sure you know the car and be sure you can handle it... Were you scared, Patrick, or did I do OK..?: Gawd, that was fun!!
It's not power that kills parts..it's traction
Another thing.. I REALLY recommend a scattershield or a blow proof bellhousing for anybody with high performance aftermarket engines who is planning on power-shifting!!!
Race Director
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Originally Posted by Ironcross
Thats what it was built for and is really not for the faint of heart. But necessary to win. Winning isn`t everything, it`s the only thing.
Winning isn`t everything, it`s the only thing.
Drifting
Joined: Sep 2004
Posts: 1,959
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From: North Bend Ohio
If you want to do number 2 you'll need one of these.
http://www.jericoperformance.com/11.html
BigBlockk
Later.....
http://www.jericoperformance.com/11.html
BigBlockk
Later.....
Drifting
Joined: Jul 2003
Posts: 1,253
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From: East China MI
Originally Posted by lars
I have powershifted jpatrick's car... this is a trip. His Vette is a 502 that's really well built. Power shifting from 1st to 2nd is a joke: It will fry the rear tires uncontrollably, and you have to ease off the throttle after the 1-2 shift. Power shifting his car into 3rd scares the hell out of the guy in the next lane (remember the cop, Patrick..?). So if you power shift, be sure you know the car and be sure you can handle it... Were you scared, Patrick, or did I do OK..?: Gawd, that was fun!!
Me while lars drove
Me after Lars drove
It was fun sitting in the other seat, experiencing what my passengers usually feel. Lars can wheel as good as he tunes! (and has a sixth sense for the men in blue)
Drifting
Joined: Jul 2003
Posts: 1,253
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From: East China MI
Originally Posted by GrandSportC3
Another thing.. I REALLY recommend a scattershield or a blow proof bellhousing for anybody with high performance aftermarket engines who is planning on power-shifting!!!
Race Director
Joined: Nov 2000
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From: Waterloo ontario Canada
Originally Posted by lars
One of the fun things I do on the Tuning for Beer Tours is take owners out and give them a ride in their own cars with some quick power shifting - :
I don't think abusing someone elses car while they let you drive it is the right thing to do.
I know a few guys that can really power shift well but they do blow a tranny yearly.
The ORIGINAL and bestest
Joined: Oct 2000
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From: Toronto Ontario
Toronto Events Coordinator
Powersshifting: full throttle, shift at redline as fast as you can without lifting off the gas! Awesome experience, unless you are a girly man afraid of breaking your car!
Last edited by 7t2vette; Nov 12, 2006 at 08:59 AM.