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injector for e85?

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Old Sep 1, 2009 | 08:53 PM
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Default injector for e85?

would 83lb injectors be big enough for 700whp using a boost referenced fpr? if base pressure was around 43 and had a 1:1 ratio putting the pressure at 60ish under full boost. thanks for any help!
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Old Sep 2, 2009 | 07:46 AM
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i have 2 255's in the tank and i am putting a 1/2" fuel in now, if it matters
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Old Sep 2, 2009 | 11:02 AM
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Originally Posted by dudeman
would 83lb injectors be big enough for 700whp using a boost referenced fpr? if base pressure was around 43 and had a 1:1 ratio putting the pressure at 60ish under full boost. thanks for any help!
You'll want more injector for safety. I'm on 95lb/hr's and 100% DC at 750 rwhp with and effective fuel pressure of 50psi (65psi base pressure -15psi of boost with no FPR reference). Going by the math my pumps are maxed out as well. Assuming a 400L/hour delivery for dual walbros, my injectors are capable of pumping 8 Liters a minute or 480L/hour or enough fuel to empty my stock 15 gallon tank in about 7 mins at WOT.

If I stick with e85 i'm going to go to 120lb/min injectors and an external pump or figure out the walbro hat trick (three pumps).
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Old Sep 2, 2009 | 06:49 PM
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good info. i was thinking 96lbers but was wodering if the 83's would do it.
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Old Sep 6, 2009 | 09:05 PM
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Yea probably outa go bigger. I just got flowmatched 81#s and twin 340 pumps. I wont be anywhere near that horsepower as im just a stock motor with 8#'s from a d1sc and e85. Thats the injector that was recomended for me from ficinjectors. Give them a call. They really know their stuff.
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Old Sep 8, 2009 | 09:17 PM
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I use I an APS twin intake pump with 79# injectors. The altitude you live at will impact what size injector you need. In Colorado we use 20% less fuel, so what I have works well.
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