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  #121  
Old 09-16-2020, 02:25 AM
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Just ordered a 6XD sequential transmission, and I had to learn a few things. The trans can do no-lift, WOT, clutchless upshifts with a momentary ignition cut. The trans has a load cell (strain gauge) built in to detect pressure on the shifter, and that activates the ignition cut (milliseconds) through the ECU. No problem. But to get the no-clutch downshifts you need a throttle auto-blip. My Wilson throttle body is manual linkage - oops.
Turns out I can add an in-line throttle control motor (the Trans Am TA1 guys do it with their carbureted 900hp NASCAR motors) and a DBW throttle and, using the strain gauge inputs, get the required auto-blip through the MoTec ECU. So the parts are ordered and the trans has a 5-week build time, but I have plenty of other stuff to do while I wait for parts.

Pappy
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  #122  
Old 09-16-2020, 04:58 AM
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very cool
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  #123  
Old 09-16-2020, 09:50 AM
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Wow the aftermarket has come a long way. I had no idea that technology was available.
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  #124  
Old 09-16-2020, 09:58 PM
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Wow the aftermarket has come a long way. I had no idea that technology was available.
Yeah, pretty neat stuff. Here is a link to 6XD: [Only registered and activated users can see links. Click Here To Register...]

CNC machined case, and the dog rings are machined so they are not part of the gear(s), so when you round off the teeth on the dog rings you just replace them and not the gear set. I chose a very close ratio with 1-to-1 5th gear and a .885 sixth gear which gets me to 175 mph @ 7000 rpm. The shifts drop me from 7000 rpm to between 5800 and 5900 rpm, with my peak torque occurring at 5850. My motor is so far back that their best option for shifter placement was still too far back, so they are providing me the C6 linkage that has a shift rod running back to the C6 transaxle mounted gearbox. All I will have to do is shorten the shaft and fab a mount for the shifter where it puts the stick right next to the steering wheel for easy bump shifts. It will take some chassis dyno time to tune the MoTec ECU for proper ignition cut and auto-blip, and you can do that for each gear separately if desired. I'll be damned if I am going to let those pesky DCT-equipped Porsche GT-3s outshift me on the straights like they do to my Viper. LOL Not having to heel-toe in a cramped foot box is a nice side benefit.
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  #125  
Old 09-17-2020, 12:41 AM
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Nice. Made in the USA. They must use gforce internals, as I see the word “stock” and that their partner is gforce in the write-up. But, I might have misunderstood. Should be a cool car.
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  #126  
Old 09-17-2020, 01:18 AM
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Nice. Made in the USA. They must use gforce internals, as I see the word “stock” and that their partner is gforce in the write-up. But, I might have misunderstood. Should be a cool car.
Good eye. The photo of the trans on their website has a sticker that says "G Force Internals" on it.
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  #127  
Old 09-17-2020, 05:55 PM
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Could you PM me the cost of that beauty? I think I can use that!
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  #128  
Old 09-17-2020, 06:48 PM
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Could you PM me the cost of that beauty? I think I can use that!
PM sent
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  #129  
Old 09-17-2020, 09:06 PM
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Quote:
Originally Posted by BBShark View Post
Wow the aftermarket has come a long way. I had no idea that technology was available.
I'll be damned if I am going to let those pesky DCT-equipped Porsche GT-3s outshift me on the straights like they do to my Viper. LOL Not having to heel-toe in a cramped foot box is a nice side benefit.
irritating Germans is such a fun pass-time.
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  #130  
Old 09-18-2020, 07:07 PM
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Originally Posted by BBShark View Post
Wow the aftermarket has come a long way. I had no idea that technology was available.
I'll be damned if I am going to let those pesky DCT-equipped Porsche GT-3s outshift me on the straights like they do to my Viper. LOL Not having to heel-toe in a cramped foot box is a nice side benefit.
irritating Germans is such a fun pass-time.
Way back in early 60's at Univ of Md.....we had a dorm buddy, names HAL....can't recall last name......so we used to call him Sour Kraut.....he was thick German accent......

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