My First Serious Mods On R33 Gtst

[Steve]

using the calculations on the page, 370cc injectors - divide by 10.5 to get the lbs/hr = 35.24 multiply by 0.8 (for 80% duty cycle) = 28.192 / 0.6 (BSFC) = 46.99 hp per injector x 6 = 281.94hp

But this is for 370 cc injectors, now we know that 370cc is what the injectors flow at 2.55 kg, which is idle fuel pressure - at atmosphere the fuel pressure is 3.05kg and the injectors flow around 410cc/min at 1 kg boost, the pressure is 4.05kg and the injectors flow closer to 470cc/min

now we have 470/10.5 = 44.76 x .8 = 35.81/0.6= 59.68hp per injector x 6 = 358 hp, getting close to the rough rule of cc size = hp at flywheel.

hope that make sense