C6 Corvette General Discussion General C6 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by: Feral Industries

Powershifting

Thread Tools
 
Search this Thread
 
Old Nov 17, 2017 | 12:02 PM
  #1  
Corvette_Ed's Avatar
Corvette_Ed
Thread Starter
Race Director
10 Year Member
Liked
Loved
Top Answer: 5
 
Joined: May 2012
Posts: 15,744
Likes: 3,265
From: Phoenix area, AZ
Default Powershifting

I was reading the recent article about powershifting in a Z06 that has TM turned on, and the problems the HP combined with the TM can cause. It got me to wondering if the same could be said for a base model with an LS3 that's had the TM turned off with a Diablo tune. Opinions?
Reply
Old Nov 17, 2017 | 03:19 PM
  #2  
irok's Avatar
irok
Safety Car
10 Year Member
 
Joined: May 2011
Posts: 3,807
Likes: 508
From: Oshawa, Ontario
Default

Originally Posted by Corvette_Ed
I was reading the recent article about powershifting in a Z06 that has TM turned on, and the problems the HP combined with the TM can cause. It got me to wondering if the same could be said for a base model with an LS3 that's had the TM turned off with a Diablo tune. Opinions?
in a car that you can't get out of the 13's it wouldn't matter
Reply
Old Nov 17, 2017 | 05:36 PM
  #3  
449er's Avatar
449er
CF Community Team
10 Year Member
Community Builder
Liked
Community Favorite
 
Joined: Apr 2016
Posts: 14,051
Likes: 7,371
From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
2024 C6 of the Year Finalist - Unmodified
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
2021 C6 of the Year Finalist - Unmodified
Default

The autos shift faster...sorry

Last edited by 449er; Nov 17, 2017 at 05:38 PM.
Reply
Old Nov 17, 2017 | 06:09 PM
  #4  
Corvette_Ed's Avatar
Corvette_Ed
Thread Starter
Race Director
10 Year Member
Liked
Loved
Top Answer: 5
 
Joined: May 2012
Posts: 15,744
Likes: 3,265
From: Phoenix area, AZ
Default

Originally Posted by 449er
The autos shift faster...sorry
And that answers the question how? And btw, the 1/4 mile results for base cars in the drag racing forum disagree with you. All but one of the top results were posted by manual trans cars.

But then, this isn't an auto vs manual thread. It's a thread about powershifting.
Reply
Old Nov 17, 2017 | 08:16 PM
  #5  
ruxvette's Avatar
ruxvette
Race Director
Supporting Lifetime
Veteran: Navy
15 Year Member
Liked
Community Favorite
 
Joined: Mar 2010
Posts: 16,841
Likes: 5,284
From: T-Town WA
2016 C6 of Year Finalist
Default

Power shifting my '50 Chev HT with a cammed 265 was one thing. If I missed the shift and blew the motor it was a cheap rebuild. Not so much with my '11 GS. I shudder to think of the con$equence$.
Reply
Old Nov 17, 2017 | 10:11 PM
  #6  
Patsgarage's Avatar
Patsgarage
Team Owner
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2012
Posts: 30,427
Likes: 1,609
From: Outside the Quick Stop N.J.
Default

I am not quite sure what you are asking, but I have shifted my GS pretty hard down the track (chirps on the 1-2, 2-3 & a hard 3-4 shift) with no issues at all. The factory launch control is set up to allow for "no lift shifts" if I remember correctly, so GM does not have a problem with it either.

Last edited by Patsgarage; Nov 18, 2017 at 05:26 AM.
Reply
Old Nov 17, 2017 | 10:12 PM
  #7  
Patsgarage's Avatar
Patsgarage
Team Owner
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2012
Posts: 30,427
Likes: 1,609
From: Outside the Quick Stop N.J.
Default

Originally Posted by irok
in a car that you can't get out of the 13's it wouldn't matter
If you are not in the 12's with any C6 you are doing something wrong.
Reply
Old Nov 18, 2017 | 12:16 AM
  #8  
ruxvette's Avatar
ruxvette
Race Director
Supporting Lifetime
Veteran: Navy
15 Year Member
Liked
Community Favorite
 
Joined: Mar 2010
Posts: 16,841
Likes: 5,284
From: T-Town WA
2016 C6 of Year Finalist
Default

Hmmm, power shifting in my day was gas pedal to the floor and clutch in and out while pulling the next gear.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-1

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-2

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-3

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-4

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-5

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-6

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-7

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-8

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-9

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
Old Nov 18, 2017 | 08:35 AM
  #9  
Dcasole's Avatar
Dcasole
Le Mans Master
10 Year Member
Community Builder
Liked
Loved
 
Joined: Oct 2014
Posts: 8,669
Likes: 2,724
From: Atlanta GA
Default

Originally Posted by ruxvette
Hmmm, power shifting in my day was gas pedal to the floor and clutch in and out while pulling the next gear.


Yep ... is there any other way of shifting when racing ???

Dave
Reply
Old Nov 18, 2017 | 09:16 AM
  #10  
Boomer111's Avatar
Boomer111
Race Director
15 Year Member
 
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Default

Originally Posted by ruxvette
Power shifting my '50 Chev HT with a cammed 265 was one thing. If I missed the shift and blew the motor it was a cheap rebuild. Not so much with my '11 GS. I shudder to think of the con$equence$.
Reminds me of the last time I attempted this kinda of shifting, back in 1966 in a 1965 GTO with Tri Power. Blow the rear end out and the car was never driven again.

Now in the big rig with 13 and 18 speeds it was a common practice to shift like this especially when down shifting when pulling a grade. No clutch of course, gotta be real quick and decisive, just match rev match and slam it into the next hole.

Technically not a full rev shift but dam close. The speed of the shift is the same.

Sometimes with the grade being very steep one has to even drop a couple of gears in order to keep the rpm up to handle the intended gear. Easy everyday deal for an experienced driver but not so easy for the novice.

I have never shifted my 2008 using the discussed shifting method in this thread.
Reply
Old Nov 18, 2017 | 10:51 AM
  #11  
windyC6's Avatar
windyC6
Safety Car
15 Year Member
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Jan 2011
Posts: 4,959
Likes: 526
Default

Originally Posted by ruxvette
Power shifting my '50 Chev HT with a cammed 265 was one thing. If I missed the shift and blew the motor it was a cheap rebuild. Not so much with my '11 GS. I shudder to think of the con$equence$.
Isn't that what the rev limiter is for......
Reply
Old Nov 18, 2017 | 11:00 AM
  #12  
ruxvette's Avatar
ruxvette
Race Director
Supporting Lifetime
Veteran: Navy
15 Year Member
Liked
Community Favorite
 
Joined: Mar 2010
Posts: 16,841
Likes: 5,284
From: T-Town WA
2016 C6 of Year Finalist
Default

Originally Posted by windyC6
Isn't that what the rev limiter is for......
In 1961 the "rev limiter" was a red hash mark you set on the Sun tach.
Reply
Old Nov 18, 2017 | 11:55 AM
  #13  
ruxvette's Avatar
ruxvette
Race Director
Supporting Lifetime
Veteran: Navy
15 Year Member
Liked
Community Favorite
 
Joined: Mar 2010
Posts: 16,841
Likes: 5,284
From: T-Town WA
2016 C6 of Year Finalist
Default

Originally Posted by Boomer111
...Now in the big rig with 13 and 18 speeds it was a common practice to shift like this especially when down shifting when pulling a grade. No clutch of course, gotta be real quick and decisive, just match rev match and slam it into the next hole...
Perhaps we're talking apples and kumquats here. "No clutch" shifting is not the same as "power shifting". With the foot feed on the floor it is extremely difficult to get the trans out of gear without clutching it.
Reply
Old Nov 19, 2017 | 08:51 AM
  #14  
Boomer111's Avatar
Boomer111
Race Director
15 Year Member
 
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Default

Originally Posted by ruxvette
Perhaps we're talking apples and kumquats here. "No clutch" shifting is not the same as "power shifting". With the foot feed on the floor it is extremely difficult to get the trans out of gear without clutching it.
I agree but with a very fast foot release and reapplying the gear can be removed. All about timing.

I wasn't trying to offer my story as being the same practice, just some chatter of shifting techniques.

Just an story from a guy with lots of mileage.
Reply
Old Nov 19, 2017 | 10:18 AM
  #15  
ruxvette's Avatar
ruxvette
Race Director
Supporting Lifetime
Veteran: Navy
15 Year Member
Liked
Community Favorite
 
Joined: Mar 2010
Posts: 16,841
Likes: 5,284
From: T-Town WA
2016 C6 of Year Finalist
Default

Originally Posted by Boomer111
I agree but with a very fast foot release and reapplying the gear can be removed. All about timing.
I wasn't trying to offer my story as being the same practice, just some chatter of shifting techniques.
Just an story from a guy with lots of mileage.
Yup, I understand. "Back in the day" the old two sticks (real trucks have two sticks ) were pretty unforgiving when shifting. Today's Eaton/Fuller's are a lot more forgiving and basically clutchless. Quite often I shift my vette by rev matching and no clutch...
Reply
Old Nov 19, 2017 | 11:18 AM
  #16  
windyC6's Avatar
windyC6
Safety Car
15 Year Member
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Jan 2011
Posts: 4,959
Likes: 526
Default

Originally Posted by ruxvette
In 1961 the "rev limiter" was a red hash mark you set on the Sun tach.
Yep....quite familiar with that, but seemed as though you were suggesting that if you missed a gear in the GS that the motor may fly apart and the rebuild cost compared to the old days would be disastrous which i'm sure it would be......
Reply
Old Nov 19, 2017 | 11:31 AM
  #17  
Jackie Chan's Avatar
Jackie Chan
Burning Brakes
 
Joined: Nov 2016
Posts: 882
Likes: 83
From: Jacksonville FL
Default

Originally Posted by Dcasole


Yep ... is there any other way of shifting when racing ???

Dave
Yeah I call that shifting normally
Reply

Get notified of new replies

To Powershifting

Old Nov 20, 2017 | 07:35 AM
  #18  
Corvette_Ed's Avatar
Corvette_Ed
Thread Starter
Race Director
10 Year Member
Liked
Loved
Top Answer: 5
 
Joined: May 2012
Posts: 15,744
Likes: 3,265
From: Phoenix area, AZ
Default

Originally Posted by Dcasole


Yep ... is there any other way of shifting when racing ???

Dave
I agree, but I was hoping for some feedback on how the car would respond when doing so.
Reply
Old Nov 20, 2017 | 08:03 AM
  #19  
Boomer111's Avatar
Boomer111
Race Director
15 Year Member
 
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Default

Taking your chances.

Please correct me if I am wrong. I do not believe the C6 drivetrain is spec'd for heavy race conditions.

Now the Z06 may have better axle 1/2 shafts but I think the gears are nothing special.
Reply
Old Nov 20, 2017 | 08:11 AM
  #20  
marinablu67's Avatar
marinablu67
Drifting
 
Joined: Sep 2016
Posts: 1,260
Likes: 324
From: Florida
Default

"Powershifting" I haven't heard that term since the 60's when I had my 67 Vette, 68 GTO. etc. Really brings back memories, fortunately I never blew an engine!
Reply



All times are GMT -4. The time now is 11:32 AM.

story-0
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-1
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-2
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-3
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-4
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-5
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-6
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-7
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-8
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-9
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE