DrCharles
Full Access Member
Wes, are you off a couple of decimal points there? It would take a diesel the size of a locomotive engine to use 70 cc per second, just idling! In a gallon there are 3785 cc... by your numbers that's a gallon in 54 seconds. My IDI likes its fuel, moving a 6500 lb truck around, but not that much 
Also, the lift pump may be RATED at (say) 33 gph, but that does not mean it's actually pumping that much through the outlet line. It just means it CAN while maintaining pressure.
Anyhow I agree that using a graduated cylinder is best, that way he'd have an actual measurement.
Also, the lift pump may be RATED at (say) 33 gph, but that does not mean it's actually pumping that much through the outlet line. It just means it CAN while maintaining pressure.
Anyhow I agree that using a graduated cylinder is best, that way he'd have an actual measurement.
, should be 100cc per minute not second, thinking on it now I would say you can’t really put a hard percentage on the amount of fuel returned because the quality of fuel, type of injectors and wear on the pintles is going to change that amount drastically. Just use a graduated cylinder 
