Must read. For those track event days, Road cource stuff. Options

[awd4kicks]

Very good info Spyguy.

I have seen this info on fuel pumps before. The part I remember and question is that they recommend a BSFC factor of .65 to .68 for forced induction engines. This makes their example which useses a BSFC of .625 confusing to me. Does anyone know where the .625 BSFC came from? Is it a more agressive, on the edge calculation or just a mistake?

Interestingly working backwards with these equations you'll find that a 255lph pump is adequate for up to 595HP using the .65 BSFC and 621HP using their .625 BSFC. (I figured both of those using a 1.25 safety margin.)

This also means that the 190lph pump would be good for 445HP @ .65BSFC or 463HP @ .625BSFC using the same safety margin. This is quite a lot higher rating than I expected out of the 190, considering I felt I was running lean with it on my 300HP 14b Talon.

Aren't there some other factors like RPM and fuel pressure to take into consideration? I'm just thinking out loud to keep this kind of discussion rolling before I read some more.