Our 6-speed Project
#121
Developer
Thread Starter
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Any updates Carl? How's this project going? Are you road testing a completed install yet?
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.
#122
Rennlist Member
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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!
#123
Rennlist Member
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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.
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.
#124
Rennlist Member
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![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
and on 335 slicks in the rear!!
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#125
Rennlist Member
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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.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
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.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
#126
Captain Obvious
Super User
Super User
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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.
#127
Archive Gatekeeper
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anderson with 520rwhp and me with over 400rwt, have never broken one.
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.
#128
Three Wheelin'
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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.
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.
Thanks for the update Carl.
Looking forward to Spring time
#130
Three Wheelin'
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I'm surprised Motodyne hasn't sued anybody yet for copying their "oft imitated never duplicated" 6 speed swap. ![ducking](https://rennlist.com/forums/graemlins/icon107.gif)
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.
![ducking](https://rennlist.com/forums/graemlins/icon107.gif)
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.
#131
Race Director
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I pick up the finished clutch shafts that I had made out of 300M, tomorrow morning. Almost the same design as the factory shaft, with a couple of significant improvements.
Being made from 300M, these replacements will be extremely difficult to break....
Jim Bailey has one of the "test" shafts in his car.
The stock ones do break. And they do wear out (actually getting tough to find good used ones.) And they are almost $600 new, from Porsche.
Being made from 300M, these replacements will be extremely difficult to break....
Jim Bailey has one of the "test" shafts in his car.
The stock ones do break. And they do wear out (actually getting tough to find good used ones.) And they are almost $600 new, from Porsche.
#132
Rennlist Member
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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.
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.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
#133
Rennlist Member
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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! ![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
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!
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
I pick up the finished clutch shafts that I had made out of 300M, tomorrow morning. Almost the same design as the factory shaft, with a couple of significant improvements.
Being made from 300M, these replacements will be extremely difficult to break....
Jim Bailey has one of the "test" shafts in his car.
The stock ones do break. And they do wear out (actually getting tough to find good used ones.) And they are almost $600 new, from Porsche.
Being made from 300M, these replacements will be extremely difficult to break....
Jim Bailey has one of the "test" shafts in his car.
The stock ones do break. And they do wear out (actually getting tough to find good used ones.) And they are almost $600 new, from Porsche.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)