Which injector size

[LightningWhite]

My plans are to twin turbo my 302. My goal is to reach a tuned 500 whp. The part I am stuck at is which injectors should I go with, 36# or 42#. I'm not sure if the 36s would be maxed out with this much power. I already have 255 lph fuel pump and plan on adding a adj. fuel pressure regulator. Just not sure if the 36s can handle this much and should I upgrade to 42s. What does everyone think. Not sure how much psi I plan on pushing out, enough to get to 500 whp though. I'm already pushing out about 300-350 whp n/a with a 9:1 compression, so I wouldn't think I would need much boost to reach my goal.

 

[faststang90]

i have a ford book and it has a thing in it about inj size. .55 is for a s/c eng and .65 is for roots s/c
(injector size x (8) # if injectors x duty cycle (.55)/bsfc so
(42 x 8 x .9) /.55
=(302.4)x.9 /.55 = 549 hp
this is a test and and its 40 psi

 

[Vipersix]

Ditto 42#

 

[LightningWhite]

Thanks guys, I was thinking 42s but I wanted to make sure.