Ok what I'm wondering is how big of an injector I will be needing?
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I hate to say a HP level the motor would be at but I'm hope to get 800HP when said and done, or at least be capable. With that said, are these new 95# injectors I just recieved in the mail today going to be big enough? Is there a chart somewhere that can justify HP rating for E85?
As far as I can tell it'll probably be well under, as tom j said.
On gasoline we'd rate the injectors power capability like this:
6 x 95 = 570 lb/hr at 100% duty. Assuming a max duty cycle of 90% we get 513 lb/hr. Assuming 0.55 lb/hr/hp BSFC for turbo on gasoline we get 513 / 0.55 = 930 hp. Personally I prefer to use a more conservative 0.60. That would yield 513 / 0.60 = 855 hp. Call that the worst case number, and the 0.55 BSFC number ~ best case I guess.
Some good data I've seen suggests a ratio of BSFC's between E85 vs gasoline of ~ 1.3. So we can use 0.60 * 1.3 ~= 0.78 lb/hr/hp for an E85 BSFC as a reasonable starting point. Then our 513 lb/hr (the E85 specific gravity is about the same as gasoline) gives us only 513 / 0.78 ~= 658 hp.
In short, it looks like we can just use the BSFC ratio of 1.3 to convert from gasoline hp support to E85 hp support. That is, 855 gasoline hp / 1.3 = 658 E85 hp.
If you want to support 800 hp it looks like you'll need 800 hp * 0.78 lb/hr/hp = 624 lb/hr of E85. Again assuming that's supplied by 6 injectors and at 90% duty, then you'd need 115.5 lb/hr injectors.
Taking the 115.5 / 95, that ratio is 1.216x. The square of that is 1.478. So to get 115.5 lb/hr injectors, you could raise the base fuel pressure of the 95's from 3 bar to 3 * 1.478 = 4.434 bar. About 64-65 psi or so. Maybe still doable, assuming only of course that you have the volume and pressure capability in your fuel delivery system to support that flow at base pressure + boost pressure at full power. At 25 psi boost you'd be trying to achieve 65 + 25 = 90 psi at the rail. Even more than that at the pump(s). And the mass flow would have to be > 624 lb/hr at that 90 psi. Requires a lot of careful planning to achieve.
Hope that helps!
TurboTR