Stage 1 benefits?

[Ruan]

Surely if you increase injection duration per cycle, then on a mech pump you are chucking in more fuel per rpm regardless of wherever you're using it or not, so if you're not on boost you're just throwing it away.

It just doesn't work like that, you're thinking petrol... If you inject MORE fuel, the achieved power goes up, that's how diesels work, you cannot inject more fuel and it not produce more power without smoking...

So if what you said was the case, you'd end up doing 100mph because you turned up the max fuel screw... If it's smoking, then yes, you're wasting fuel...

My car at 175hp, still returns 55mpg on a run, if you're moving on down the motorway, sort of 80-85, it might drop to 50mpg, that's with a f*cked head gasket and bent connecting rods...