how much boost could i safely run in a fc3s 13bt on a stock turbo with a larger aftermarket top-mount street port and a single turbo back exhaust???

 

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stock ecu, stock fuel pump, stock injectors?

like 8psi.... those are your biggest restrictions. not the turbo, IC, and engine.

you need more fuel for more power and boost.

 

with an FCD you can safely push 10 psi(if you have open exhaust and intake).....It's not recomended to push any more than that if you are running the stock fuel system.....get some bigger injectors, fuel pump and an S-AFC and you may push more(like 12) but it is pointless on a stock turbo.......You will eventually have to upgrade the turbo and in order to get the best out of your car you will need a standalone.......