Bronson M

iTrader: (1)

I was browsing around under the "Fuel Pump and Pressure Control" settings to get an idea of how I will implement my PWM controller install and noticed there is a setting for "fixed" or "Vac referenced" pressure regulation strategy. It says in the notes that a different calculation will be done internally which makes sense obviously.

Question is with the fuel pump control set to "on/off" I have that particular setting set to vac referenced on a NB which is obviously it is not. If I change this to fixed will this affect the actual fueling calculation or is this purely for fuel pump control?

DNMakinson

iTrader: (3)

Not in my experience. We tried switching it back and forth with no change in EGO's.

The fueling formula does not include such a correction.

I kind of guessed it came into play with MPG calculations or something that cared about actual flow of fuel through injectors.

Bronson M

iTrader: (1)

Cool, I'll change it when the time comes to get the PWM controller working. With that said any concerns with running a walbro 255 with a PWM controller?

I was seeing fuel pressure creep at low loads with it run at full power.