Bob Rooks
Elite Member
Nope, not so. The hotter the better (within reason of course). It's called thermal efficiency. Engines are more efficient at higher temperatures. You will hardly find any engine nowadays operating below 185° to 200°. The higher fuel pressures, around 1,300 bar, promotes better atomization of fuel which translates into more power and better efficiency. It's hard to dismiss old wives tales and speculation for proven science, but believe me, every engine manufacturer is trying to sell engines, and it's much easier to do when you can meet all regulations and still be competitive with longevity and power.I have decided to keep the EPA engine out for now. Runs hotter with a higher fuel pressure? To me it sounds like it's asking for trouble.