Project update -- pics from recent garage shenanigans:
First chance to get the top down this spring. So glad to say goodbye to the snow. I've got to find somewhere warmer to live.
Got the FM stage 1 clutch and lightweight flywheel installed. This was a tough job in the driveway with the car on jack stands. I will definitely try to find a lift to use before trying this one again.
A new bung welded into the stock exhaust for the wideband O2. This was definitely worth the time. I ran into some issues getting the settings right in TunerStudio which would have been a nightmare if I were installing the turbo at the same time.
Blasted and painted some of the tubes and pipes from the used BEGI-s kit that were looking a bit worse for wear. Used rustoleum exhaust paint. Surprisingly tough stuff after curing in the oven. I'm looking forward to seeing how it holds up to the heat.
This was the straw that broke the camel's back for the chinese turbo that came with my kit. A broken stud that doesn't want to come out. I was already hesitant about using a turbo that I didn't know the history of, and I knew I wanted something that would spool more quickly. Time to find an alternative.
A SR20 T25 is right on point. Small, cheap, and easy to find. This one came from the classified section here.
I finally got a chance to mock everything up. Bought some RX7 studs (part number 9YA921003) and copper locking nuts. The studs had to be trimmed a bit, but what a bargain for inconel studs.
I made a new mount for the wastegate actuator. Fabbing things on the fly is what I love about projects like this.
Also installed some RX8 425cc yellow injectors. I had some 550cc RX7 injectors that needed rebuilding, but I stumbled upon the RX8 set brand new for $135. No brainer.
I've started experimenting with adjusting the AFR tables and using autotune. I'm a bit confused about why there are so many different opinions on the appropriate AFR values. I feel like this should be standard for all miatas, within reason. Am I missing something? Is there a master table that many tuners use, or a good reason for so many differing perspectives?
I'm hoping to complete the initial turbo install in the next couple weeks. It will basically be a BEGI-s kit with a SR20 T25. Low boost. No intercooler. Stock exhaust. I'll build from there.