View Full Version : Injector Size

02-27-2006, 09:24 AM
Twin Turbo 9-12 Ps1 Max (for Now... This Summer Lol)
6 Speed
3:31 Gears

....will Ford 42 Lbs Work ?

02-27-2006, 09:32 AM
No, too small.

A simple injector lb/hr equation is:

(HP) x (BSFC)/8cyl x .8 duty cycle = lb/hr

In your case: (800 x .6)/(8 x .8) = 75 lb/hr

You'll want around a .6 BSFC with a boosted motor.

02-27-2006, 12:48 PM
Scott has the math right, but I always like to be conservative and I figure a .65 BSFC for boosted applications. I had to buy injectors twice (underestimated the HP, lol) and lost $250 on the ordeal of selling them and buying new ones, so that's my reasoning for being a bit more conservative on the calculations. :P

I'd say 75 or 83 lb/hr injectors would be the way to go.