Saw I guy at the track with a Miata SC. From what he told me he is on his 3rd belt and says does not matter how much he would tinker here and there sooner or later it would pop the belt.

I would stay true to boost, as long as the engine is healthy and has a good tune.

Jeeze how many times does the OP have to state that he's not getting an M45 setup?!?

I've tracked my car many many many times and it's never ever thrown a belt. 6 ribbed belts and an autotensioner plus good alignment of the supercharger stop that, however the OP is on anout a rotrex setup.

The rotrex is highly track proven, that part is not in doubt.

For a track car a rotrex is the most reliable solution. For a street car a cheap diy turbo setup is fine. Plus the rotrex sounds evil off throttle lol

THIS.

You wanna hardcore track your car? rotrex
You want to have a more fun street car? turbo

If he's read the issues with CHRA's, he should know he'll be fine if he doesn't use Tial housings and has inconel flange studs... at worst he could safety wire his CHRA bolts.

The lessons have been learned, the solutions are nothing complex.

Get in the 1.8 rear, the radiator, the brakes, the wheels, the tires, safety setup, everything you'll need anyway. Learn to tune, have fun with what you have. Don't let indecision about the future ruin your current fun. You can progress right now.

Okay, I'd say I'm back up 95% on just completing the turbo build I've got going. Sold a rifle for some cashflow, got my state tax refund, and finally got the G20 running last night so it'll go up for sale in a day or two. Should be in pretty good shape to start working on the Miata again.

I just saw this thread today, so I will chime in if I may.

Please for the love of God finish what you have started. I have changed my mind in the coarse of a build, and it is was not worth it (not this one).

I have stayed with my current configuration no matter how much ribbing and joking from the folks on this forum because I do not want to waste all the time, energy, and expense I have invested over the years on my project. It is such a sickening feeling when you abandon the project because you have a need for chasing rainbows, but it is such a glorious feeling when you get it done.

You can always start from scratch after you have finished the project and drove it for awhile. You will also hone your skills better when you finish a project. Much of the learning curve is when the project is near completion. If you start over, there is a risk of getting burned out and getting out of the game completely.