Caperix New Reader
5/1/22 7:46 a.m.

I need to start building the fuel system for my v8 datsun project.  At this time I don't have plans for running e85, but I don't want to redo the whole system if I change my mind.  So I know I should plan extra fuel flow requirements & at least have an area that a flex fuel sensor can be added.  What about materials?  Is standard nickle/copper line ok to use with high ethanol blends, or should I step up to stainless?  Is 3/8" supply with a 5/16 return ok for sizing for a 350 to 400 hp engine or should I go up a size?

Pete. (l33t FS)
Pete. (l33t FS) MegaDork
5/1/22 9:00 a.m.

I have done 750 crank HP with 3/8" feed lines on gasoline, you should be fine with E85

I hate nicopp lines with the passion of a thousand suns  smiley but they should be fine.  (I mean, they need to be replaced every four or five years because the copper corrodes badly, but...)  The main thing you should avoid is aluminum fuel lines.

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