If i got one of those aftermarket fuel pressure regulators, could i gain any hp out of it? With the stock computer could i increase hp by either turning up the fuel pressure or putting in bigger injectors? Ofcourse still maintaning the proper air/fuel ratio. If i couldn't with stock ecu, could i upgrade to a stand alone programmable ecu and do this, or do it more compared to the stock ecu?

 

Adding a fuel regulator will increase the HP numbers on a modified car...if you are still using stock intake, or exhaust, then it won't help much. Even if you do have the exhaust or intake, the fuel mods won't help all THAT much unless you have porting....larger injectors would help you get better acceleration at higher RPMs, but going to large on a stock motor would cause an over rich condition...which isn't healthy...

Again, the ECU wont be needed to be modified unless your doing or have done serious mods to your motor...for now, you should look into the MAF mod....its a little tricky...I'll see if I can find a good write up for it...or make one myself...but basically you can take your mass airflow sensor and turn this little "wheel" inside of it too richen your mixture....let me see what I can find on that for ya...

 

I have heard bits and pieces of that. Its the idle fuel mixture screw. Its black and has a little arrow with L & R on it. Right above the mas air flow sensor. How can that help though.? a complete guide would help a lot... thxs