Ok, I've tried reading all over this but I can't get a solid answer, so I figured I'd just post. I'm doing my first turbo miata, I just bought a kit from CRX and I all ready have an E-manage. I already have the injectors. What I need to know is how much can the stock fuel pump, rear end, and tranny take in a 1.6? I want 200 whp...but if the rear end and tranny can't take it can't take it I'll go for 180. And I've seen on here everyone is usin 2.5' exhauste and I was thinking about 2.75' or even 3', would that help at all?
Thanks
Brian

 

stock pump max depends on the injectors and the pressure. this is also related to the about of boost you run.

your transmission and differntial will hold @ 200 hp if you aren't punishing them.

3" exhaust on a 1.6 = overkill.

 

transmission will hold, rear might not. If you are easy on it, i.e., no clutch dumps and difting it shouldn't be a problem. I've abused mine since I've had the car and even now with the turbo no problems yet

180-190hp is usually the limit to the rear end, but without abuse it shouldn't have any trouble.

2.5" exhaust is plenty

 

I hate to say it, but I plan to beat it. So what would be a safe amount of power to go with and still be dependable? (this is my only car) 42pounds of preasure with probly supra or rx7 injectors is what I wanna use. I thought that with a turbo you want as much free flowing exhaust as possible?

 

start searching and reading. the only way you're going to effectively run injectors that big is with a standalone ecu. you can swap in a 1.9 torse, drive shaft and axles.

that's about $1500-2000 right there.