Judging by

im asuming my 1988 Rx7 Gxl has (86-91 Non-Turbo = 460cc)
im not sure if that primary or all...

then with the calculator by increasing
the primarys to 640's
and the secondarys to 720's

it should push out
Total Flywheel HP:
227.3
@
ECU Controlled Max Duty Cycle - > 58%

is this true, changing my injectors
i could increase 73.5HP

is there anything anyone suggests for injector setup?
is there anything that should be done to the car before changing to bigger injectors?
what do you guys think? is this a good way to get me over 220HP?

on another note... what is the best shifting RPM for maximum HP on a stock 13B?
N/A...

 

You can't just throw more fuel in there and expect to get more HP. The problem would be lack of air. An N/A engine can only suck in so much air with the intake, porting, etc. on there.

 

lol, you need more AIR to go with that fuel, which a stock car isn't going to get. To get 220hp on an N/A, you're going to need to port the engine, a fuel controller of some kind, a DECENT intake, and various other modifications.

 

Get an SAFC and lean the car out. I've got a pretty heavily modded streetported 88 GTU and I'm running lean with the stock injectors, which is why I'm about to buy some 550's. You would get more power by leaning out the mixture with your stock setup. Get a full exhaust too.