i'm planning on adding a street port when i rebuild my engine, but was wondering if i need anything extra for fuel. currently the only thing I have is a walboro fuel pump. car will also have intake, downpipe and test pipe, but stock cat-back. engines from a 91 jspec turbo (though i think us and jdm s5 turbos were the same)

 

you could start thinking about some 720 secondarys you need to defenitely have a boost and air/fuel controller if you dont....

 

hmm, didn't even think about a boost controller. guess bigger port = more exhaust = more boost? dont have too much money to spend, so i'm looking to do this as cheap as possible. though, if it makes the difference between having to rebuild it again, i'll definitly spend the money. so is an s-afc needed? and would i need to port the wastegate to keep boost down?

 

anyone?

 

When ever you think about adding more air you should always think about adding more fuel. Just due to the fact that not two street ports are quite the same (due to the persons hand when he is grinding away) you have to tune to your application. I would suggest bigger injectors and a S-AFC (or equivalent system) min. Peace