Quote:
Originally Posted by MrForce
Most older OEM fixed fuel pressure regulators were set at 3 bar (43.5 psi), therefore the injectors were rated at that pressure. If you change the fuel pressure to 58 psi (the OP's question) the injectors do flow more, search the web for the formula. For the Gen 7, simply plug the new injector flow rate into the config screen and all is good without a re-tune.
Peace,
Rob
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Not true, it won't change the VE number automatically.
The Gen 7 uses 7 parameters in a mathematical formula, one of which is the VE, to calculate how long to pulse the injector to achieve the desired air/fuel. If you change the fuel pressure after doing the tune and change the fuel pressure value in the config as mentioned, then you'll need to change all the VE numbers to a lower value. However this can be done easily by clicking and dragging across the entire table, pushing the X key and multiplying everything by .90 or whatever. In theory you would have the same amount of excess in all areas.