Confused - Educate me on fuel line sizing
Haven't posted in a while but I'm still plugging away on my long-term project.
I've got my engine built and dyno'ed with a carb at 514hp at 6200 rpm (crank) and am working on the fuel system for EFI. Several years ago I bought a bunch of -6AN fittings, fuel filters (100 and 10 micron), Walbro fuel pump (http://walbrofuelpumps.com/walbro-gsl392-inline-fuel-255lph-pump.html), -6AN tube nuts and sleeves for 3/8" OD (1/4" ID!) aluminum line, etc, etc. All of the stuff is basically -6AN or fits to -6AN. At the time I was thinking I'd be around 375-ish HP crank. Had a little scope creep in the HP department. :) Anyway, I'm reviewing in light of that.
- I've got 42lb injectors which should easily support the power (I'm hoping to be almost 550 NA crank HP on premium) when this is all done but hopefully not too overkilled.
- The pump supports 670hp according to Walbro's website.
- From what I've read.-6AN supports right around 600hp at the pressure I'm looking at.
- The 3/8" OD, 1/4" ID aluminum hardline, to mate up to the -6AN, from what I've read will NOT support that much HP but when I look at the inlet on the Walbro pump at only ~3/16" (!) ID after the fitting is screwed in, I wonder how it can be possible that this pump supports 670HP?
What am I missing and what would you recommend I do?
Thx!