DR1665
Well-known member
Brake specific fuel consumption (BSFC) is a function of pounds of fuel used per hour relative to power output (lbsFuel/HP) and is used to calculate target injector size, but I wasn't able to find anything regarding BSFC figures for the Galant here with the search. General consensus seems to be turbocharged engines should be 0.60-0.65 BSFC, but where does that figure come from? I'm not looking to go overboard with the math, since there's a point where injector needs take a backseat to market forces. (ie; Why pay more for 700cc injectors than for commonly available 720s?)
Assumptions:
BHP = 300, BSFC = 0.60, numINJ = 4, DC (duty cycle) = .80 (80%)
(300*0.60)/(4*0.80) = 56lbs/min * 10.50 = 590cc for 80% duty cycle at 300bhp
As BSFC increases, so too does injector size for a specified target.
I'm just curious. Stock injectors are 450cc, right? Do the math with 100% duty cycle and 300bhp is theoretically possible on 472.5cc injectors. I know. I know. This isn't an ideal situation, and I'm not suggesting some rookie asstard runs out and tries this in his barely maintained 4-door DSM, but it seems to me 280bhp would be possible on stock injectors, assuming the pump could keep up.
Don't really have a question with this one. More open to discussion, I guess. Seems like you could get into plenty of trouble on a set of 750s and a stock engine; pretty close to 400bhp, anyway.
Just spitballing.
Assumptions:
BHP = 300, BSFC = 0.60, numINJ = 4, DC (duty cycle) = .80 (80%)
(300*0.60)/(4*0.80) = 56lbs/min * 10.50 = 590cc for 80% duty cycle at 300bhp
As BSFC increases, so too does injector size for a specified target.
I'm just curious. Stock injectors are 450cc, right? Do the math with 100% duty cycle and 300bhp is theoretically possible on 472.5cc injectors. I know. I know. This isn't an ideal situation, and I'm not suggesting some rookie asstard runs out and tries this in his barely maintained 4-door DSM, but it seems to me 280bhp would be possible on stock injectors, assuming the pump could keep up.
Don't really have a question with this one. More open to discussion, I guess. Seems like you could get into plenty of trouble on a set of 750s and a stock engine; pretty close to 400bhp, anyway.
Just spitballing.