Pink injectors?
07-21-2009, 07:08 AM
#14
4th Gear Member
Join Date: Aug 2007
Location: Shelbyville, Indiana
Posts: 1,088
The 0.5 component of the n/a formulae I presented above is the BSFC (Brake Specific Fuel Consumption) for n/a engines. For forced induction you need to use a BSFC of 0.6 or a bit higher depending on boost levels (0.6 for 5-8 psi, 0.65 for 8-10 psi, and 0.7 or maybe more for 10-12 psi+).
07-21-2009, 07:46 AM
#15
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
The 0.65 BSFC may be a bit aggressive, depending on how much boost is actually making it to the intake manifold-however the 42 lb/h injectors, at 80% duty cycle will get you to 400 to 420 HP. The PCM will push them to almost 90% before giving up--that would be 460 to 470 HP at 0.62 BSFC.
Keep in mind also that this is a "rule of thumb" formula for initial selection of injector size--a whole lot of real world factors go into actual performance capability.
Keep in mind also that this is a "rule of thumb" formula for initial selection of injector size--a whole lot of real world factors go into actual performance capability.
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