Injector Flow Rate table B4001 ????'s

[GAMEOVER]

I had brain fade...
The IFR {B4001}table should be sloped or flat with a returnless fuel system? I'm using the corvette fuel filter/regulator on a 2005 6.0ltr
If I accidentally went with the opposite of what was required, what's the worse that can happen?.....

[joecar]

Yes, sloped with a returnless (constant pressure) system...

think of it this way: at constant rail pressure, injectors flow more as manvac increases (i.e. moving to the right in the B4001 2D plot).


If you specified a flat B4001 table when it should have been sloped, worst case:
- at exactly WOT the IFR is the same;
- at non-WOT the IFR is understated (flat curve), so PCM opens injectors longer, this causes extra fuel so trims go negative.

[GAMEOVER]

SLOPED / with RETURNLESS &
FLAT _ with VACUUM REFERENCED...(i.e regulator mounted on fuel rail w/ return line)

Thank you Joecar...