Forced Induction Supercharger/Turbocharger

Fuel Pressure questions

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Old Jan 15, 2008 | 09:36 PM
  #16  
snorkelface's Avatar
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From: Alta Loma, CA
Try not to use a boost-a-pump. You'll want to go in the direction of a twin in-tank setup with what you are planning.

On my car, planning for 15lbs of boost (will only run 12lbs at first), I went with 86lb injectors. There is a formula to calculate what you are going to need based upon an 80% duty cycle for the injectors (which will be your target). You'd have to run an impedance converter for these injectors, but it would be worth it. If I run into the formula, I'll post it.
Old Jan 16, 2008 | 05:30 AM
  #17  
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try this : http://www.rceng.com/technical.aspx?...3Wx3muLYWKW2JO
Old Jan 16, 2008 | 01:04 PM
  #18  
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Originally Posted by subarubill96
That's it.

Remember that you are talking about FWHP when doing that formula, not RWHP. Some people really screw up their calculations based upon that as that can be a dirfference of a couple hundred HP.
Old Jan 16, 2008 | 01:24 PM
  #19  
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Originally Posted by subarubill96
stock fuel pressure (43.5lbs), add 13.5 psi boost = 20 lbs of fuel pressure due to fighting 13.5s of boost
43.5-13.5 = 20psi?
Old Jan 16, 2008 | 02:49 PM
  #20  
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ahahaha math never was my strong subject
Old Jan 16, 2008 | 03:51 PM
  #21  
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i always converted it to engine horsepower using what RWHP i was looking for then dividing by .85 for drivetrain lose (i have an auto and s60 ), that should give you ROUGH number to plug in for what your motor is cranking out unless i got it all backwards
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