Racing Beats Turbo Vert game plan.......
12-05-01, 10:22 PM
#1
Driving RX7's since 1979
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Racing Beats Turbo Vert game plan.......
Good guestion for the room. Racing Beat, in their wisdon, chose to use an automatic trans for their 2nd Gen Tubo Vert . Argument is auto trans does a better job keeping the turbo spinning. Makes sense.
In my future is a T2 engine retrofit into my Vert. I'd like to follow Racing Beats example.
Issue - a 2nd Gen NA Auto trans obviously wouldn't hold up to the power of a T2 engine. I could possibly obtain a J Spec T2 Auto Trans, but repair part availability is an obvious issue.
Has anyone tried to retrofit a 3rd Gen Auto trans into a 2nd Gen?
With just substitution of a 2nd Gen rear counterweight I assume a 3rd Gen Auto Trans would mate to the engine. But:
1. What about the rear mount?
2. What about the shifter linkage?
3. Even more, are any of the various 2nd Gen driveshafts correct length to connect to the rear diff?
Certainly something to ponder.
In my future is a T2 engine retrofit into my Vert. I'd like to follow Racing Beats example.
Issue - a 2nd Gen NA Auto trans obviously wouldn't hold up to the power of a T2 engine. I could possibly obtain a J Spec T2 Auto Trans, but repair part availability is an obvious issue.
Has anyone tried to retrofit a 3rd Gen Auto trans into a 2nd Gen?
With just substitution of a 2nd Gen rear counterweight I assume a 3rd Gen Auto Trans would mate to the engine. But:
1. What about the rear mount?
2. What about the shifter linkage?
3. Even more, are any of the various 2nd Gen driveshafts correct length to connect to the rear diff?
Certainly something to ponder.
12-05-01, 10:52 PM
#2
W. TX chirpin Monkey
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Call Chris Ott from Rotary Performance....he's got a TII vert and should be able to handle your Q's.......972-530-3335.....Personally i would just go with a manual......parts are available and less custom fabrication should be made
12-05-01, 11:06 PM
#3
Thanks for the reference. Any more?
12-06-01, 09:07 AM
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Re: Thanks for the reference. Any more?
Originally posted by HOZZMANRX7
Custom fabrication is what I'm hoping to avoid. Otherwise, 5-speed is the way I'm going.
Custom fabrication is what I'm hoping to avoid. Otherwise, 5-speed is the way I'm going.
One annoying aspect of the 2nd gen auto is that it is controlled by its own computer. The stock US software was designed to keep a relatively low torque NA car on the top of the torque curve. So when you put a turbo motor in the car the shift points are wrong. It wants to downshift too much. Maybe the computer can be reprogrammed. I don't know. The lock out feature can be used to control the shift points.
Rob
Last edited by Rob500; 12-06-01 at 09:17 AM.
12-06-01, 11:34 AM
#6
Ex fd *****
The FD Auto is the same as the MPV Minivan but w/ different ecu programing - but why not just use T-II auto?
Mariah has built a Convert w/T-II auto. The ECU wiring is a pain because the harness is not set up for an Auto
Mariah has built a Convert w/T-II auto. The ECU wiring is a pain because the harness is not set up for an Auto
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12-06-01, 11:44 AM
#8
Former Moderator. RIP Icemark.
Off the top of my head; I would think that the Jspec auto and Jspec TCU is acutally gonna be your best choice. Bolt in factory style and factory drive shafts the right length appeals to the minimalist in me.
Unless it is completely worn, Auto trannys generally not need too many replacement parts and those that do would be fairly interchangeable with the 929s and the US spec 86-88 RX7 tranny.
Plus, the Turbo Auto vert was available in Japan through 92 as a 92 production run even though the FD was also available in Japan at that time, so there should be plenty available.
The other thing that comes to mind is that are we convinced that the Jspec Turbo Auto is really different than the US spec NA tranny?
Unless it is completely worn, Auto trannys generally not need too many replacement parts and those that do would be fairly interchangeable with the 929s and the US spec 86-88 RX7 tranny.
Plus, the Turbo Auto vert was available in Japan through 92 as a 92 production run even though the FD was also available in Japan at that time, so there should be plenty available.
The other thing that comes to mind is that are we convinced that the Jspec Turbo Auto is really different than the US spec NA tranny?
12-06-01, 05:20 PM
#10
knowledge junkie
The TIIs were NOT available in an automatic, only 5 speed. The FD had an auto as fast autos were popular in the 93-now years.
I suggested the 929-S trans as it's rated for 200-220HP.
I suggested the 929-S trans as it's rated for 200-220HP.
12-06-01, 06:08 PM
#11
Lives on the Forum
I dunno what's all the hoopla about the auto-trans.
RB probably went that way cause it was more of a cruiser than a real "sports car".
The turbo (manual) trans is one of the strongest production transmission made.
Don't even bother trying to find a J-Spec auto turbo trans, the car will end up a slug (compared to a similar 5-speed manual).
-Ted
RB probably went that way cause it was more of a cruiser than a real "sports car".
The turbo (manual) trans is one of the strongest production transmission made.
Don't even bother trying to find a J-Spec auto turbo trans, the car will end up a slug (compared to a similar 5-speed manual).
-Ted
12-06-01, 07:00 PM
#12
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I suggested the 929-S trans as it's rated for 200-220HP.
Does the bolt patter of the trans housing match up to the 13B Wankle?
Also, what about rear trans mount and driveshaft. Both fabrication chores?
Also, what about rear trans mount and driveshaft. Both fabrication chores?
12-06-01, 11:37 PM
#13
Former Moderator. RIP Icemark.
Originally posted by vaughnc
The TIIs were NOT available in an automatic, only 5 speed. The FD had an auto as fast autos were popular in the 93-now years.
I suggested the 929-S trans as it's rated for 200-220HP.
The TIIs were NOT available in an automatic, only 5 speed. The FD had an auto as fast autos were popular in the 93-now years.
I suggested the 929-S trans as it's rated for 200-220HP.
Check out Mazda japans site, their are pictures there of them, as well as production specs
12-07-01, 10:47 PM
#16
knowledge junkie
Icemark,
Interesting, bet they were a POS and killed 1/4 mile times.
Would be interested to know how they were tuned. If all your power is above 2500 rpms in any gear, wonder how they compenstated?
Interesting, bet they were a POS and killed 1/4 mile times.
Would be interested to know how they were tuned. If all your power is above 2500 rpms in any gear, wonder how they compenstated?
12-08-01, 12:21 AM
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Originally posted by vaughnc
Icemark,
Interesting, bet they were a POS and killed 1/4 mile times.
Would be interested to know how they were tuned. If all your power is above 2500 rpms in any gear, wonder how they compenstated?
Icemark,
Interesting, bet they were a POS and killed 1/4 mile times.
Would be interested to know how they were tuned. If all your power is above 2500 rpms in any gear, wonder how they compenstated?
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