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Old 02-27-2006, 07:24 AM
RickM415 RickM415 is offline
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Default Injector Size

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Twin Turbo 9-12 Ps1 Max (for Now... This Summer Lol)
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3:31 Gears

....will Ford 42 Lbs Work ?
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Old 02-27-2006, 07:32 AM
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XcYZ XcYZ is offline
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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.
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Old 02-27-2006, 10:48 AM
Blown353 Blown353 is offline
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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.

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

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