Carl Fausett

Sorry I have nothing to report as yet. I have 5 customers waiting for a finished 6-speed kit at this time.

Unfortunately, the guinea pig for this project is the same car as the Stage III kit tester. That development has gone longer than we expected, so I haven't been able to take the car out of use to finish the 6-speed kit.

I have quite a lot done on the 6-speed kit - basically all I can do without putting into the car.
Here is a link to a Facebook photo gallery on that project. Each picture has its own caption/explanation.
https://www.facebook.com/media/set/?...3156459&type=3

Note the after-market vibration isolaters in the driveline - because the 'vette guys told us the rubber ones rip apart at our torque levels - just like you were saying above.

I have committed to finishing this 6-speed kit before spring. I just need a moment longer to wrap up the Stage III kit first.

checkmate1996

I would love to have a six speed...80 mph and turning 3k RPMS on a long trip gets a little rough after a while!

Aspkiller

Hi Carl-
Be aware that the couplers you're showing also break. After ripping through a pair of them, I've gone to solid aluminum ones. When the poly ones rip and bolt parts start flying around inside the torque tube at 120+, it's a noise you won't soon forget. Machine your own to exact tolerances needed in the drive line.

mark kibort

anderson with 520rwhp and me with over 400rwt, have never broken one. you could have had a misalignment of yours. thats 15 years of racing the same part!

and on 335 slicks in the rear!!

mark kibort

thats what a 2.2 can buy you. a true over drive, with little downside.

Or, you can be an Aston Martin Factory vantage race car with a 13:1 1st gear, its a 6 speed too and 6th runs at 3000rpm at 80mph too. so, its really a 5 speed as well. (same gear box for all the Aston cars, and its a ferarri /lambo box as well)

the vet 6 speed lines up pretty even with the 2.2:1 gear box, as seen by my race video. Almost all shifts are very close to each other (redline vs MPH wise).
the 928 uses 2-4th in a race, and the Z06 505hp vet does the same.

Imo000

Most of the 6speeds that GM used had double ODs. 5&6 were both over drives to increase MPG. My '93 Trans Am had a T56 and had to be well into highway speeds to use the 6th. When I dropped the rear to a 4.11 the 6th became the 5th and was more usable. My 996 has a 6 speed too but the ratios are better split for normal use. The RPM drop after 3rd is less than what is expected in normal transmission so, the 6th feels like a OD but the 5th doesn't. If the Corvette 6 speed gear ratio anything like what the T-56 had then it is nothing more than an normal 5 speed with an extra gear at the end.

Rob Edwards

Ahem.

https://rennlist.com/forums/9035303-post29.html


https://rennlist.com/forums/928-foru...end-recap.html

Not Mark's, but from a street car that got dismantled:
https://rennlist.com/forums/928-foru...22-torque.html


Tonight I'll post a pic of the intermediate shaft that I pulled out of the Zombie, Mark was well on his way to breaking another one.

Koenig-Specials 928

Thanks for the update Carl.
Looking forward to Spring time

77tony

Standard C5 & Z06 ratios. T

17prospective buyer

I'm surprised Motodyne hasn't sued anybody yet for copying their "oft imitated never duplicated" 6 speed swap.

Hahahaha. They now do armoring of vehicles!

Check out these DOPE Audi's!!

http://motodyne.com/frames/audi_a8s8ms8l.html

Lol. I can`t believe that guy isn`t in jail getting *** raped yet.

IcemanG17

I managed to snap one in HALF with my brute 289ftlbs!!!!

mark kibort

we will never know if this isn't from a bang, downshift. yes, this is a torque thing, but generally, the engine torque cant do this. And that brute Anderson has done this before on the cup car due to a downshift.... but it was a short shaft that met its twisting fate

mark kibort

probably did it with a downshift. im pretty sure 289 ft-lbs isn't going to twist up some metal shaft like that. think about it. a 300lb guy on a lever 1 ft out attached evenly at the shaft. this is a work of a power downshift!

They break when abused. Always nice to blame the design or the engine power/torque, but in the end, it sometimes is due to something that is not obvious. Nice you have a solution to avoid this problem....... ahem............... I think if you are breaking these (which you can change out in an hour, you best continue to break them until you figure out how not to break them... otherwise, you move the problem to something much more expensive and harder to replace!

mark kibort

that's funny, the standard C5 with a 3:42 is a 300mph gear box in 6th.

xschop

Yeah the next fuse in the 928 driveline is the trans input shaft. Assuming all the shafts are the exact material and tempering and stress riser design, the shortest shaft will break first.