LT1 fuel rail inside diameter?
08-05-2008, 09:30 PM
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In case anyone cares, I bought a set myself and disassembled them to check. They are in fact 5/8" ID, but actually have sort of a D-shaped cross section with a small flat portion of the inner wall on the floor where the injectors enter. I calculated the cross sectional area through the inside of the rail and found it to be slightly larger than that of a -10 AN hose.
(sorry for the poor cam-phone quality, but you see what I mean by "D-shaped")
So basically, there's no need to search for aftermarket LT1 fuel rails (they don't exist, not direct fit anyway). All you need to do is scrap the hard feed line, crossover line, and the stock regulator, and weld on some AN nipples and presto....rails that can keep up with ANYTHING you can throw at them. (for example, the aeromotive 5/8" ID rail is advertised to support 3000 hp....no doubt through a parallel rail setup)
I hope this was informative for someone else because I was curious how far the stock rails could be taken, assuming the rest of the fuel system was beefy enough.
(sorry for the poor cam-phone quality, but you see what I mean by "D-shaped")
So basically, there's no need to search for aftermarket LT1 fuel rails (they don't exist, not direct fit anyway). All you need to do is scrap the hard feed line, crossover line, and the stock regulator, and weld on some AN nipples and presto....rails that can keep up with ANYTHING you can throw at them. (for example, the aeromotive 5/8" ID rail is advertised to support 3000 hp....no doubt through a parallel rail setup)
I hope this was informative for someone else because I was curious how far the stock rails could be taken, assuming the rest of the fuel system was beefy enough.
