Might be time for a quad4rods bell housing and astro gear t5 (and custom ppf adapter).

 

Might be. Trying to decide now if I should throw in the carillo rods and cp pistons in 9:1, button it up with some h11 studs and shoot for 600+, or just do another stock motor and keep it at 15 psi for 50k miles and actually drive the car. Hard choice.

We do have something in the works for a t56. That's a much better suited trans for the miata. But a bit more work than the t5 it looks like.

 

Any updates?

 

Sure. Took the motor apart and we did in fact have major scoring from all the overheating at the track last year. Really surprised it survived 250 temps more than once. Has another stock frankenmotor from the spare 2.5s we have laying around.

Currently diving it around, terrorizing just about anyone that gets in it. Need to make a proper roll bar for it and get the spare trans beefed up a bit then it may see some drift events this year.

Short launch control/two step rolling cut action breaking in the new ceramic coat.

https://www.youtube.com/watch?v=2R1c3KlkE-o

 

What do you plan on doing to fix the overheating? What components did you have that allowed it to overheat?

What do you plan on doing to beef up the transmission?

https://www.miataturbo.net/meet-gree...t-86322/page4/

I cross-posted some of your replies in that thread, where a few of us are theorizing about power levels, breakage, and such on 2.0's and 2.5's. Since you are way past the power level either of us want in that thread, your experience would be valuable.

 

My personal thoughts are to just put some better head studs, cams, and valve springs on a stock 2.5 and then turbo it. Your post #22 in this thread where you say you had a choice between going all out or just turboing a stock 2.5 at 15 psi for 50k miles appeals to me. What power level do you think a stock 2.5 would be at 15 psi?

 

No need for arp hardware until 500+ torque, even then only the l19/h11 are effective.

Valve springs and cams definitely. Our NA 1.5 cams worked perfect and we keept power to 7500 at 21 psi. At 15 psi it is at now we are about 350 torque/400 hp with meth/pump gas. I have a set of id1000s on the shelf for e85 use so we can run cooler at the track. That's probably all we need to get by.

The stock 2.5 thing is a mixed bag. The Mazda version has forged rods, but they are pencil thin compared to the cast rods in the ford motor. Much lighter, but I'm not 100% convinced they are stronger. We have another 2.5 here that is at the machine shop to get the mains line honed, we will likely build that one instead while we find the limits of this motor.

 

Regarding the recently cooked motor: are you running any aftermarket oil cooling?

Edit: also, you just using ECUtek features for your anti-lag? Sounds like launch control with some timing retard...

 

Factory water to air. We have an oil cooler kit ready for release soon that will be way better than that, but we're not tracking it with the turbo yet.

Correct on the ecutek stuff, we're dumping fuel and adding timing with a rolling cut to then generate whatever boost we want stationary. Pretty neat.

Oh...and it's going to get worse

 

I can't wait to see the results!