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Thread: 650 HP Injector size?
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03-29-2007 #1
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650 HP Injector size?
I'm not sure I'm doing this right! For a 650 hp BBC with 45 psi fuel pressure I would need 55# injectors?
Al
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03-29-2007 #2
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injector size X 2 X number of cylinders X 80% duty cycle.
55 X 2 X 8 = 880 X.80=704HP
50 X 2 X 8 = 800 X.80=640HP
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03-29-2007 #3
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So would the 55's be a safe bet on a true 650 hp motor?
Al
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03-30-2007 #4
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yes
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03-31-2007 #5
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50's would be fine n/a but 55's will give you more room and even the 60's would be fine. I was running 50's and moved up the 60 high Z for some dry nitrous on my 491 which is barely south of 650 HP. Either would be fine. For a power adder I'd go 60 minimum at 45 PSI.
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