$1500-$4000.

Should have asked originally...besides here, miata.net, and eBay...where else is a good place to source one?

Appreciate the reply.

That's about it. Craigslist if you live in an area with Miata parts.

Or any of the "Miata parts" Facebook groups.

Where are you located?

Harlingen, Tx. About 4 hours south of San Antonio .

I bought a fairly complete setup about 5 years back. MP62, MSPnP, larger throttle body, higher boost pulley, Devil's Own water injection, and I think some gauges. Whole mess was about 3 grand.

Along the way I've upgraded things like the clutch, exhaust, bought several versions of wideband, etc. Probably have $3500-4000 tied up into in all told, but some parts are duplicates and may be sold later.

Turbo is probably easier, cheaper and more reliable. But I like to be contrary.

It's really going to depend on what you get. A shoddy looking M45 setup isn't worth much more than $1k to me, and I watched one sit on CL for months at $1500. I paid a bit under $3k for my MP62 with TDR intercooler, TDR header blanket, upgraded pulleys, injectors, huge throttle body and a dummy stock replacement, and an automatic tensioner. I think it may have been a bit high compared to market, but I am not the least bit disappointed with what I got for my money. They don't come up for sale often and mine looks to be in really great shape.

I am disappointed with how bad I am at tuning this MS3 though.

I paid 1100 for a BRP kit. However I hated the performance of a non intercooled supercharger so I ended up buying a TDR intercooler setup and 640cc FF injectors. Think I have about 2500 in parts into the kit.

Honestly, at the price point, MKTurbo is pretty amazing and well endorsed here. If you don't want MS, then buy a piggyback. You'll get a hard time from folks around here, but you could do 8psi to hit that power level easy, like FlyinMiata kits. A smaller turbo's power delivery won't be too far off from a PD Blower and keep pretty good response.

https://mkturbo.com/dynos.html

I have one for sale if you're interested.

Def interested. Sent you a PM

There is a brand new (never installed) m45 for sale on miata.net. It's for a 1.6 but you could modify it to work with a 1.8.Price is kinda high though.
https://forum.miata.net/vb/showthread.php?t=675626

Only kind of high? Yeesh!

Price is way high. I'd sell my MP62 with all the stuff for 3 grand, and that includes everything, not just the blower.

I'm super late to this party, but a data point for you: I just picked up an M45 Jackson Racing kit for an NA8, full and complete, for $1,100. Found it on Craigslist. (I'm just excited to have a question that I can actually contribute to!)

Similar sentiment here, and essentially identical circumstances. I bought a MP45 kit via Craigslist, around 7 years ago, for about the same price. It was fairly "complete", with plumbing, a Track Dog Racing pulley setup (assuming power steering and air conditioning), and two principal pieces of electronics: a small rectangular gadget called a "BIPES ACU", for retarding the timing, and another similar gadget for - well, memory escapes me. These devices are now widely panned for being ineffective and clunky, but there is a countervailing opinion, that if all that one wishes is the stock boost available from MP45 (stock pulley, no intercooler, etc.), then this approach is OK, and may even offer maximum results for minimum cost and fuss.

This collection of parts has been sleeping uneventfully on my garage shelf for all of the intervening years. I've not yet decided what to do with it... keep and use as-is, modify, or sell.

As a data point: I just sold a Seabring 1.6 M45 set for $1200. Included a crank overlay pulley, upgraded BRP tensioner, all the brackets, silicone couplers, and everything needed to run a dual throttle body setup.