TBI Fuel Line Diameters?

[Doug Dayson]

Hi, with the below engine specs I calculate the fuel needs as follows...

202 lbs per hour at WOT (12.5 to1 A/F, 90% VE, 6000 rpm), or roughly 33 gallons
per hour at WOT.

So how do I calculate fuel line ID?

And how much overage is acceptable for a safety factor (5%)?

Hoping to use the current 3/8" inlet and 1/4" return, yes?

Thanks...

Doug

> > >I'm looking into possibly converting my 71 Vette 406/400 to TBI (from a
> > >well-dialed Q-Jet).
> > >
> > >Engine specs...
> > >
> > >406ci, TFS Twisted Wedge heads, 1 5/8" X 3" Headers, 218 @ .050 110 LSA
> hyd
> > >flat tappet cam with .485 lift with 1.6 Rockers, medium-rise dual plane
> > >and 750
> > >Q-Jet. Current powr peak is at 5200 rpm, torque peak at 4000 rpm (a
> > >reasonably
> > >mild and streetable 406).
> > >

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