[beatr911]

Back to heating the fuel, as a mod.

I remember reading an article from Misubishi and it's study of direct fuel injection. On the subject motor, the fuel was routed in a gallery in the head, then to the injector. It was a returnless fuel system so the fuel was naturally being heated to the temp of the cylinder head. As I was researching this heated fuel thing at the time, I specifically remember that they attributed a fuel savings of 5% to the heating of the fuel. There were other gains from the very high pressures of DI but since I wasn't about to try to make a DI system, it wasn't about to stick in my head.

Anyway, for a low pressure injection system like most of us have (DI systems run over 2000psi), who knows? Like most things, the effectiveness of heating the fuel 'depends'.

I think why this (these) threads originally died is that no one provided repeatable, measurable data. Data like fuel temps, intake air temps, afr ratios, etc. Also, few people implemented the mod to test it. So in boredom we all let it go.

An easier mod to do (so it was implemented more frequently) is the warm air induction and it was found that certain vehicles respond well, Saturn SL1 I think was a good one.

So, please test this mod someone. I finally have a car with a returnless fuel system and this is on the list of things to do, number 4 or 5 at this point though