fuel pump + fuel regulator

I would recommend replacing the stock injectors and getting a fuel controller as well. And if you get 550cc or larger injectors, I'd also put in new fuel rails and fuel lines. Stock fuel rails don't and lines are restrictive. If you install new ones they will be less restrictive and give you better flow.

Wak Wak said:

... but what if i change my fuel pump to walbro 255 lph and add a hks fuel regulator .. can i then go more boost .. and is my chose of fuel pump and regulator .

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The fuel pump does not increase the delivered fuel - assuming it was not maxed out before. The FPR does not change the fuel delivery, assuming it was working properly. The stock FPR is just fine for most of our 11 second cars.

http://www.geocities.com/lutransys/jlucius2/j2-2-fuelpumpguide.htm

To safely take advantage of the *stock* turbos at their max output you need to 1) install 450 (or larger) injectors, 2) install a 255 lph pump (Supra turbo pump is the best choice in this class), 3) intstall a air flow signal modifier like an AFC, ARC2, or VPC. and 4) install gauges like A/F, FP, boost, and EGT.