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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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Which injector size

  • Thread starter Thread starter LightningWhite
  • Start date Start date Aug 5, 2008
L

LightningWhite

New Member
Aug 2, 2007
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0
Aug 5, 2008
#1
  • Aug 5, 2008
  • #1
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

10 Year Member
Nov 5, 2007
522
16
49
baytown texas
Aug 6, 2008
#2
  • Aug 6, 2008
  • #2
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

Founding Member
Feb 25, 2001
434
0
0
Clarksville, TN
Aug 6, 2008
#3
  • Aug 6, 2008
  • #3
Ditto 42#
 
L

LightningWhite

New Member
Aug 2, 2007
15
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0
Aug 6, 2008
#4
  • Aug 6, 2008
  • #4
Thanks guys, I was thinking 42s but I wanted to make sure.
 
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