Fueling for 400whp
#21
It'd all come down to the flow and the real world losses. Has anyone measured this on a stock system? Measure it at 100 cc's, 500, 750, 1000 dot dot dot. You may find the losses become significant at 200 hp, you may very well find them at stock levels (in which case it's likely taken care of in the fuel map, as a change in VE even though of course it's ridiculous), but it might be a 2% loss in pressure at 75 gallons per second. :-)
If someone's measured it, I'd love to see it. I wouldn't put that set up on without knowing what the drop was, and it's easy to measure.
So why not regulate at the far end of the rail like the NA cars?
If someone's measured it, I'd love to see it. I wouldn't put that set up on without knowing what the drop was, and it's easy to measure.
So why not regulate at the far end of the rail like the NA cars?
#22
It'd all come down to the flow and the real world losses. Has anyone measured this on a stock system? Measure it at 100 cc's, 500, 750, 1000 dot dot dot. You may find the losses become significant at 200 hp, you may very well find them at stock levels (in which case it's likely taken care of in the fuel map, as a change in VE even though of course it's ridiculous), but it might be a 2% loss in pressure at 75 gallons per second. :-)
If someone's measured it, I'd love to see it. I wouldn't put that set up on without knowing what the drop was, and it's easy to measure.
So why not regulate at the far end of the rail like the NA cars?
If someone's measured it, I'd love to see it. I wouldn't put that set up on without knowing what the drop was, and it's easy to measure.
So why not regulate at the far end of the rail like the NA cars?
Regardless of what the measurements are, it's silly to have a returnless setup on a boosted car where fuel is "so important" that people buy 200 dollar fuel rails just to minimize a "possible" pressure difference between each injector. Yet all these 99's are running around loosing who knows how much at load. Rail fuel pressure is a function of many variables.
Gotta go to D.E.
#24
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I have to admit though, my formal education on electronic fuel injection systems is well over ten years old and at that point DI was more of a theory for emissions than anything else..
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