You might want to scrap the Turbo 2 trans idea and go straight for a T10. The gear ratios are really, really wide on the Mazda box. Plus, once you have a T10 in there, fitting a real racing box will be that much easier, since most are based on T10 dimensions.

 

isn't a t10 a 4 speed??? i was hopping with the 5 speed and whicked gears to get into 5th, but ya there may be to much rpm drop between gears for the peaky 12a, i can make my own bellhousing adapter so that wouldn't be a problem, but what are you guys with t10 using for flywheels?

 

I was originally looking into getting a close ratio 6 speed like a getrag from a bmw

 

Why not just get a 13 speed transmission out of a semi?



It's good to have decently close gearing (no producton 6-speed box has it, though, neither does any strong Mazda box) but there gets to be a point where the gains from having many gears are nullified by the time spent shifting. Even the guys running split-slider transmissions (no clutch, no lift to shift - they actually momentarily engage two gears simultaneously) are running only four or five gears, and THEY don't have to worry about time lost in a shift.



9500rpm, no overdrive, and 26" slicks make for a 130mph top-end, not counting tire growth.

 

Ok so how about a c-4 auto tranny lol, ya i see your point

 

i could just use the split rear end i have laying around from my 57 fargo 5 ton lol hahaha, at weights just about as much as my rx3

 

Man there are plenty of cars in Florida and Puerto Rico that are running deep into the tens and some high nines with a turboII transmission. I have Jesus Padilla's shop number somewhere but if you can get a hold of him he has a guy in Orlando, FL that makes the periferal housings for him and the guy makes them for quite a good price.

 

There are also plenty of people running 12's that should be running 10's, because their TII transmissions don't like to shift at high RPM. Just food for thought.

 

Yes there are modifications that can be done to the turboII transmission to allow for high rpm shifting mainly to the forks. My friends datsun 1200 with a 12a and 150shot nitrous leaves the line at 10500rpms and thats on the rev limiter. He never misses a gear and yes it's a turboII transmission. No doubt there are those who have totally stock turboII transmissions and can't shift them at high rpms but there are also a lot of people who know how to modify them to work. And the modification that is done to the forks are simple and require a little welding. Food for thought maybe not if you know what your doing.

 

I have a 4 speed toploader from an early mustange that i think might to do the trick, on a side note, i am designing another PP housing for turbo purposes and i am wondering should i have it open a couple degrees later then the MFR PP?? i have also been told to come in at a greater angle downwards then the mfr, which comes in basicly straight