Fox T-Bird/Cougar Forums  

Did not know about the impedance differance but there should be something smaller out there for the low impedance, from what i understand the low systems can use both.
He won't be pushing that kind of power by just upping the boost and not doing anything else so i figure he'll be just shy of 300hp.
The stock regulator ups the pressure under boost anyways 1psi-1lb of boost so running 25 pounds of boost should raise the pressure the same over base allowing for more fuel flow.

A 302 and a 2.3L are total different beasts. Cut the amount of injectors in half, while keeping the same amount of power, and what happens? You double your duty cycle. So then you think, chop your power in half, 250+, 4 of those same injectors are then working at an 80% duty cycle. You can get away with adding pressure, but as you add pressure, your spray pattern suffers.

Not to mention, 42# injectors for your V8 are high impedance.

On a turbo 2.3L, 65# injectors are good for about 400-450.

Yes, the factory regulator increases boost 1psi per 1psi of boost, but that isn't always enough at higher boost levels. Increasing the base pressure can get you a little bit more out of your injector, but like I said before, the spray pattern suffers.

To add:  as pressure increases the flow through the injector; it DECREASES pump output.

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im getting a 255lph walbro fuel pump,
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yup yup. three words: high pressure pump.

not just 255lph, but 255HP lph.
only takes 22psi boost at base fuel pressure(39psi) to be over 60psi FP under full boost. if youre cheating injectors by raising base pressures, you will be over 60psi under boost in no time.