I've been trying to find maps for the T25 from the 2G Eclipse and for the S13 SR20DET. I'm trying to get parts together for a ghetto-charger for the Miata, and trying to figure out which turbo to swipe from the shop

 

Mitsubishi doesn't use compressor maps. as far as I know they don't exist.

I would go with the SR20 though. It's bigger, and is better suited for the Miata. Is the Miata a 1.6l or 1.8?

Before I finally decided I was going to build up my CRX, I pondered with the thought of selling it and buying a 1.8l Miata to do a full T3/TO4E setup on. Those motors are "Supra" in strength...

 

The miata is a 1.8L, which makes things alot harder as the more common 1.6L parts are not compatible. The goal of the setup is only about 30-40 rwhp. It's being built to e an "Eaton killer" that can do everything te JRSC can do w/o costing $2800. I'm looking at ~5psi non-intercooled, so a big turbo is not really important. I'm more worried about the efficiency numbers due to the lack of i/c.
I was leaning towards the SR20 since I believe it runs lower boost stock than a 4G63 (at least the S13 ones anyway), so it would hopefully be more suited to the low pressure ratios I'll be seeing