I know that the NA drive train is only good for about 250hp MAX. But Im afraid my engine with 157k on it is on its last leg. I want more power like the rest of us. But I am not looking to make a monster since I want to keep it a daily driver. Im gonna get a T2 or an FD for a weekend racer later. What kinda problems and pieces will I need to mix and match with to make this work. Or did I get given something not quite legal at my last party with out my knowledge????

Anyone with some good knowledge like Ted, Brad, anyothers $.02 is welcome to chime in on this.

 

the NA drivetrain is not as fragile as some people think. There are a lot of miatas pushing 300-350+ HP on the stock tranny and rear end.

 

OK if its not as fragile as I was lead to believe then what can a NA drive train take?

 

The N/A tranny can only hold 230 hp @ flywheel. Get the whole drivetrain like me.:p

 

I have TII engine with NA tranny
(Must change flywheel and front counterwieght to use NA tranny)
I ran it good with stock clutch
as soon as I put in a Heavy Duty clutch
I blew 2 trannys in less then a week

Time for a TII tranny for me
You can use a TII tranny with a auto driveshaft
and it will bolt to the NA rear...

 

Yes, 230hp is about where you start to have problems with the NA tranny while road racing. It's all about the torque, though, so I would imagine that drag racing would cause more stress, while regular street driving would cause less stress on the tranny. Note that the TII drivline components are heavier, and will therefore weigh down the car more, increase the driveline inertia, and increase FHP loss. Also, the TII driveline parts are more expensive to replace. However, if you plan on tweaking more HP out of your TII engine, then you are better off with the beefier TII driveline.

Have you actually tried that yet?

 

Does that actually work? Has anyone actually tried it?

 

No, it does NOT. It's too short by about 2" (I've seen pics with measurements to support this!)

Paul,

You got all the TII stuff right? I'll help ya swap the drivetrain out any time- you can do that BEFORE you do the motor if you want.

Got a place to do it right? Or do we have to wait until I move in to the new place to have a garage?

Brad

 

Thanks Brad,

I did have a T2 and tranny but I was offered twice what I paid for it one night out at Kenedale. So Im actually back to looking again for another engine. But I do have a place to do it but I think the driveway would be way too steep. but Im hopefully gonna start lookig for a place after the first assuming I can find a permanate position again. I hate contract work.

 

the na and TII rear are diffrent
size wise

hmm maybe I have it wrong
it could be you can use auto drive shaft on na trany with TII diff
since the TII diff is longer then the na one