Hey I’m new and don’t know my way around the form yet so hopefully I’m in the right place but I am planning on boosting a spare 1.6 motor I have for my 1992 Miata and I’m trying to figure out what I should do for injectors. I have a spare renesis 13b from my rx8 that came with a spare set of injectors and I’m hoping that they can be used for my build. I don’t know much about rx8 injectors to be completely honest but I assume that they are probably a bit faster than the stock ones from the 1.6. Does anyone know if they will be enough for a little sr20 turbo?

 

From what I know, yes. Find injector data online for tuning and they will be enough assuming you don't have a built motor.

edit: thought these flowed more :/

 

What I usually see discussed when these get brought up (just summarizing, I have no experience with these injectors) is that they do flow more. I found a thread on here suggesting they're around 420 cc's.

However, most people usually recommend getting something more modern. It seems to be really hard to find genuine injectors. There are loads of cheap clones floating around out there. IIRC they also aren't the most forgiving and using a more modern injector will give you better control at idle. I've seen a couple remote tuners who say they won't touch a car with yellow RX8 injectors due to how finnicky they can be and the issues around cheap knockoffs.

I'm guessing from your name you are pretty budget oriented and getting something like FlowForce 640's isn't desirable. Personally I'd say run the yellows and report back. Again, I just see a lot of discussion about these but I missed the era where people were running these.

Also, if you're on the stock ECU I don't think it'll be able to control these, I could be wrong.

If you're talking about a GT2560 from an S14, then you'll probably run out of injector before turbo. Punching some numbers into a calculator shows you'd probably limit out around 200 WHP and that turbo should be good up to about 275. 200 is still pretty quick though.