1st/2nd gear sensor?
You mean just control boost by gear or boost by speed with the abs/speed sensors?
We've had that for years.

It's not the wheel spin most of us loathe, it's the constant shifting.

Where can I find out more about this rear end. I googled Getrag 3.28 and got stuff about mopar stuff. Sounds interesting.

search his threads. he's got a thread about it

here

https://www.miataturbo.net/suspensio...stalled-83274/

It's awesome, beautiful and amazing. But not exactly what I'd call plug and play. Sorry. Drunk comment is still drunk :)

I've run a 6-speed with 4.10s, 3.909s, and 3.636s.

4.10s are ideal for track cars under 240whp or so. 3.909s work between 270 and 350whp, and north of 350whp, you want 3.636s for better traction in 3rd and 4th. 3.63s are too tall for ~270whp cars - 5th gear feels doggy on track with so much gear.

On the street, 3.636s are great, 3500rpm at 78mph, and you're never beating on the car in 5th on the street (or at least you shouldn't be), and the other gears are short enough that you don't feel like you NEED to downshift to go someplace.

I wouldn't mind a little more rev drop on the freeway with the 6sp/3.63s. A T5 box with G-Force's .75 overdrive will solve that, though.

Speed sensor is very easy. Use the search function. Run a single wire to the ECU for NA6, otherwise its already at the ECU. and profit.

Actually, that's not the problem I'm trying to solve at all....

Foremost, first gear is always going to spin. Nothing we're talking is meant to "solve" 1st gear traction loss. More to the reality, 1st gear is so incredibly short that it's useless for damn-near anything unless towing or a 15% incline are involved. Maybe both.

Also, why are the ONLY two options bog or bounce redline? Are we talking on the strip or the street? Because I'm reasonably confident that a turbocharged application can be reigned in with throttle management. Unless the pedal is pinned to the carpet, I can be reasonably sure of keeping it off the revlimiter.

This seems like a non-sequitur. I'm never going to "launch" at 1500RPM under race circumstances, and if I"m just tooling around on the streets I'm never going to be at such low RPM's unless I've completely stopped. Nobody is asking for a 50mph first gear, unless we're talking about a 250mph Miata here...

Throttle management solves all of this.

The best solution for me is to stretch ALL the gears rather than invoke even more pain with electronic management that further removes me from the decision making. The only place I *might* consider electronic management is in 6th gear, and ONLY because the NC's 6th gear with ~350tq applied tends to rip off all the teeth. Since I have zero interest in EVER going for land-speed records, I have considered using some gear-aware EBC just to ensure I keep it low and slow in 6th.

Based on the other feedback in this thread, it looks like my head is in the right direction. The lowest I've found (native, factory option) for the NC is the 3.72 set, but I can also see other options either with replacement pumpkins or special kits to retrofit other R&P sets.

For what I'm trying to accomplish, the 3.7 is probably fine.

I'm awaiting shipment of Mfactorys 3.33 ring and pinion for my 2.4L ecotec x MSM 6mt setup. Car makes a lot more tq under 4k than probably most turbo miatas and really want to take advantage of that on the highway and any future forced induction plans. Won't get the gears installed till christmas time ish so you'll see me complaining about my 6mt x 4.10 setup for a while.

Megasquirt has boost by gear built right in, NB has the speed sensor in the trans, NA gets it from the cluster.
i went from 3.9 to 3.63 with a 6 speed in my NB and it was a great move with ~250hp. 60mph in 2nd. The shift points were much better at summit point and mid Ohio and will keep me out of 6th gear now that I can get 135mph in 5th.