I am getting my car back this week and want to turn the boost up from 7psi. I was wondering if someone could tell me how to do it without a boost controller and what would be a good psi to set it at since I have 750 cc. injectors and the turbo is an 18G, but nothing is done to the internals. Thanks

 

Ok, first of all, if you are turning your boost up you need the following at a minimum:

1. Fuel Cut Defender (keeps the ecu from cutting fuel at higher than stock boost levels)
2. SAFC or equivalent ability to adjust fuel delivery. With those upgraded injectors the ECU will not be compensating for the increased fuel flow.
3. An AFR meter and possibly and EGT as well. When tuning use only a wideband, not the narrowband kind off the stock or 4-wire O2 sensors. When not tuning a normal AFR gauge can be a useful tool if you know how to read it properly.
4. A ported wastegate.

Do a search, there is a LOT of information on this topic.

 

You dont to port the wastegate to raise the boost

 

No you port the wastegate to handle the higher exhaust and intake flows that higher boost creates.

 

buy a full exhuast... it'll go up.

I wouldn't want to boost more then stock through the stock cats anyways. too much backpressure and stress on the engine.

you'll need an FCD and bigger fuel pump