Eric's FG BIG update

[misk]

how does the orbital system control fueling?

[Yortt]

how does the orbital system control fueling?

As with LPG vapour injection liquid LPG aftermarket injection uses a piggy back computer, the piggy back computer receives the petrol injector pulse width signal from the petrol PCM tune and modifies the petrol pulse width to drive the LPG injector to give the appropriate LPG delivery.

So all you need to do is tune as you would with petrol which is tracked by the LPG computer and delivered to the LPG injector. The only problem is with aftermarket duel fuel systems if the piggy back computer has not been calibrated accurately in the first place then small variations in the standard LPG/Petrol tune can be amplified with the upgrade petrol tune resulting in only one tune being optimum this is usually the LPG tune because this is the fuel mostly used.