Question for Cal Guru's

[puppet]

If I'm doing this right, I tune safe fuel pressure for WOT at 25psi boost. Works out to right around stock levels at idle ... maybe a bit less. (+40's, 3bar stg5, 255 pump)
The question I have is do the cal's fuel tables take care of fueling at cruise/off boost levels limiting the duty cycles enough for efficient MPG or does it just get close?

I was thinking of a way to make the fuel system a little more flexible, mechanically. Using a restrictor bypass in the fuel return line that would be boost activated. You'd set your WOT setting when in restrictor bypass. When not in boost the stock return line would be used lowering fuel pressure level. Restrictor size would determine the % of fuel pressure drop.

... or is this level of functionality not needed?

[GLHNSLHT2]

The cal should take care of it. You shouldn't have to touch the fuel pressure. If you are then the calibration is not Tuned right. With a proper cal you should have your stock fuel pressure reg on there. If it is too lean at wot and too rich at idle or the other way around then you need to have it re-calibrated.

[puppet]

OK ... I don't know how the code works.

[TurboBuggy]

Quote:

Originally Posted by puppet OK ... I don't know how the code works.

are you running D-cal or CHEM?

[tryingbe]

Sounds like FWD cal.

[puppet]

Yep ... it's an aftermarket cal. This post is a result of my tinkering nature and complete lack of knowledge as to how versatile the fuel tables are within the ECU's code.