Hey, i got a 95 civic lx, with a d15, I was wondering if I could put the b16a2 p30 ecu in, to get any sort of horsepower gain. Just want it for the better fuel maps, etc.. Let me know guys.

 

It's mapped for a very different engine, so no. You'll also get a check engine light because you don't have a knock sensor on your engine. You have so little power to start with that ECU tuning is going to net you very very small gains, like maybe 1-2HP. You're better off getting the bigger power mods first, like intake, exhaust, header, cam gear, etc. Then you can get your ECU chipped and tuned and pick up a few odd HP maybe.