Attention: TDR Forum Junkies 
Reading the tag on the side of the injection pump got me thinking (…do you smell something burning?). The rated HP on my ISB is 235 at 2700 RPM, and at this power level the pump injects 92 mm^3 / stroke. With 6 cylinders and each cylinder receiving a shot of fuel every 2 revolutions, the engine uses ¾ liter or 0. 2 gallons per minute at peak power and at 2700 RPM. Now if I am making 500 HP with modifications to the fueling, 0. 5 gallons per minute should be plenty of fuel. I realize that most of the fuel going through the pump is used to cool and lubricate it and is returned to the tank, but the engine is using only 0. 3 gallons per minute more when making 500 HP.
Is the stock lift pump so wimpy that it flows less than a gallon per minute and causes the fuel pressure to drop? Or, am I way off in my assumption that HP increases in proportion to the added fuel?
There is a fine line between hobbies and insanity.
Is the stock lift pump so wimpy that it flows less than a gallon per minute and causes the fuel pressure to drop? Or, am I way off in my assumption that HP increases in proportion to the added fuel?
There is a fine line between hobbies and insanity.
