I was thinking about what big power mod i should go with next and came upon 3 options. NA turbo or SC. Now, i'm not trying to start a turbo vs na vs sc war here i'm personally leaning toward the NA.

So anyways, let me get to the point. I need some info on power gains, just general since not many have really done this yet. I own a 91 NA rx-7 and i was told by Mazdatrix that they can replace my rotors with the renesis rotors no problem. Then on top of that they told me that it would be a few hundred dollars cheaper!

Now i was thinking, the .5 compression ratio increase(9.5:1 to 10:1) will result only in about a 5% increase. Will the weight reduction in the rotors also play a factor? oh and since they would have my motor i was planning on doing a little street porting too. how much power will the street port bring? I will also replace my injectors and fuel pump and at least an S-AFC if not a stand alone ecu. my current mods are a racing beat cat replacement pipe and hks filter so i'm guessing i should be putting down around 180-190 at the crank. What kind of power do u think i will make after these mods.

The best part about this option is that if im ever itching for a little more power afterwards i can always slap a turbo or sc on at low boost.

 

i think you'll get alot better info at:
www.rx7club.com