nitrous
 

I have a crx hf with a b16a engine swap with catback exhaust, fuel regulator i want to get direct port nos. who does a clean install and how big of a shot can i go up to with out blowing my motor.

75 wet.
50 dry.
Get a fuel pump, an SAFC, and 310cc injectors.
150 wet.
100 dry.
Long as the block holds up, and you can keep detonation away.

You will need serious tuning if running that large.
A 75 shot will be most impressive for you.