Miata Turbo Forum - Boost cars, acquire cats. - m2k Build! From supercharged 1.6l to F20c

- Build Threads (https://www.miataturbo.net/build-threads-57/)

- - m2k Build! From supercharged 1.6l to F20c (https://www.miataturbo.net/build-threads-57/m2k-build-supercharged-1-6l-f20c-90762/)

Getting ready to make all my AN lines this weekend. Here's a shitty diagram with all the fittings and adapters. If anyone needs part numbers for anything just let me know.
https://cimg7.ibsrv.net/gimg/www.mia...23883824fa.png

Just found googles version of visio (draw.io) and holy shit is it so much nicer to use.
https://cimg7.ibsrv.net/gimg/www.mia...57c9ebc7a9.png

I'm also in the process of designing the adapter from the s2000 driveshaft to the miata diff. Running through the analysis now for weight optimization. Currently at just under 4lbs in mild steel.
https://cimg9.ibsrv.net/gimg/www.mia...2a273f3f3f.png
https://cimg0.ibsrv.net/gimg/www.mia...90cd4ac917.png

I wonder if an s2000 diff would fit in a miata msm carrier....then you could use a shortened s2k driveshaft and skip the adapter.

Bolt pattern is probably different.

Currently the driveshaft is 3" too short and the bolt patterns are vastly different as you can see. If I didn't have the OS Giken diff in the car currently, I'd probably try to swap in the s2k diff thats sitting on the floor although I'm not familiar with the msm carrier. Currently hoping to sell that though.

The MSM and s2k diffs share guts. So MSM axles would fit in an S2k diff.

Ah, I see. In that case, that could've driven placement of the trans and motor via driveshaft length instead of just where I wanted the trans.

While I decide between the cost of making a new driveshaft vs. having that adapter machined I found time to finish the muffler and downpipe. I should be finishing the wastegate mounting this weekend and the intercooler mounting over the weekend.
https://cimg7.ibsrv.net/gimg/www.mia...d72f57a541.jpg
https://cimg8.ibsrv.net/gimg/www.mia...bf8eaeddcd.jpg
https://cimg6.ibsrv.net/gimg/www.mia...bd65486fdb.jpg

I wonder how loud this will be inside the car. I wonder how loud it'd be if you simply used a metal substrate cat as an exhaust. Tighter form factor. Ok, maybe
not radially.

I want twin scroll so bad. I want honda motor so bad. I want lots of things so bad.

I can only imagine this being loud for the passenger soooooo not my problem haha hopefully I can make a lot of progress this weekend and move on to wiring so I can start this thing.

Time to start bringing a tire sprayer for that right front tire...

It was a pain in the ass to weld this and it warped just a little bit so a final adjustment after work today and the manifold will finally be complete. I will also be making some parts to mount the intercooler today.
https://cimg1.ibsrv.net/gimg/www.mia...a1e64d2fe2.jpg
https://cimg2.ibsrv.net/gimg/www.mia...7d837f6455.jpg

Just thought I'd give an update. I've had a bunch of issues reading in the cam and crank signals correctly with MS3x, but I think I finally figured it out after grinding some teeth off of the cam wheel. Intercooler pipes are done, they were super simple. The cadillac escalade radiator hose also came in clutch again for the upper hose. Just about ready to start it up. Also found some good stuff in the scrap bin for a front undertray/diffuser.
https://cimg5.ibsrv.net/gimg/www.mia...06e94853b1.jpg
https://cimg6.ibsrv.net/gimg/www.mia...acba57a872.jpg
https://cimg0.ibsrv.net/gimg/www.mia...8308734ced.jpg