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?

irok

in a car that you can't get out of the 13's it wouldn't matter

449er

The autos shift faster...sorry

Corvette_Ed

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.

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$equence$.

Patsgarage

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.

Patsgarage

If you are not in the 12's with any C6 you are doing something wrong.

ruxvette

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

Dcasole

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

Dave

Boomer111

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.

windyC6

Isn't that what the rev limiter is for......

ruxvette

In 1961 the "rev limiter" was a red hash mark you set on the Sun tach.

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.

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.

ruxvette

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...

windyC6

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......

Jackie Chan

Yeah I call that shifting normally

Corvette_Ed

I agree, but I was hoping for some feedback on how the car would respond when doing so.

Boomer111

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.

marinablu67

"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!