North American Turbocoupe Organization



Nwc t5 questions
Mint tbird Offline
Junior Member
#1
My 1983 turbo coupe just got a Boport head along with a gnari turbo kit. My main concern is how much power I can run through the non world class t5. I plan on nothing more than 300hp for a while but will eventually want to replace the trans with something that will withstand more power. Any help appreciated.
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Pete D Offline
Administrator
#2
https://therangerstation.com/tech_library/T5ID.htm
https://www.allfordmustangs.com/Detailed/349.shtml be sure to read the introductory print.
Pete Dunham


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Mint tbird Offline
Junior Member
#3
Thanks for the reply! I guess I’m gonna have to find a new trans... I haven’t found too many options other than the t56, and the tko 500 and 600 but can’t justify spending over $2000 on a transmission. Are there any cheaper routes while safely putting out over 400lb ft?
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anasazi4st Offline
Senior Member
#4
Yes according to the chart a stock T5OD—even World Class—can’t handle that much torque, only 240 ft/lbs. I’m sure with some modifications you could probably get to 300-305, but that sounds like the top end.
Another proud dues-paying member.

1987 Turbo Coupe w/T5OD, 8.8 axle, grey smoke; most options. Got it in 1991 with 41K miles: 3 turbos, 2 heater cores, 1 T5OD full rebuild, 5 clutches, 1 head gasket, 2 Teves II ABS units, etc. later....
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firebirdparts Offline
Junior Member
#5
To me, it's totally worth $2000 for a transmission, if that is what you want. I mean, a rebuild for a Chrysler minivan would still be $2000. Right? It's a bargain. I know that doesn't help, ha ha.
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andrewjs18 Offline
Administrator
#6
I'll be in this boat soon enough too, I'm sure. My TC is probably close to 275hp or so as it is now and I recently picked up a pimp ecu, 1.9 boport cam, 80# injectors and such for the car. I'm hoping for about 330-350 HP.
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