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<... can drill them out to at least the ID of the 5/16 inch hose barb ...>
That's exactly what I did. The drill turned out to be 1/64" smaller than the 1/4" I was shooting for, but I figure if works for Tracy, it'll work for me. I could drill it out to 1/4" or even a tad bigger if I thought I really needed it, but then I'd be worried about structural integrity.
Jim S.
Bob White wrote:
Thanks again Leon.
That's a good point about the EFI pump outlet size. I bought my pumps from Tracy and they have 5/16 inch hose barbs on the inlet and outlet. The outlet is threaded 3/8-24 so I ordered two AN-3 to AN-6 adapters (two pumps). Back in January Jim Sower reported finding them at XRP. The AN-3 side only has a 1/8 inch hole, but since I'm using an 'O'-ring to seal, not the cone, I can drill them out to at least the ID of the 5/16 inch hose barb. If that's more than 1/4 inch, I will just drill them at 1/4 inch. It looks like I'm in good shape to just use a standard EFI setup. Bob White
On Fri, 18 Feb 2005 20:24:10 +1100 "Leon" <peon@pacific.net.au> wrote:
Hi Bob,
Thanks for the comments. Upon re-reading what I wrote, I do need to
clarify what I wrote last post. I should have been a little more succinct
in my statements, as it sort of conveys a meaning slightly different to
that which I had intended.
<snip>
The reason for this is that when you look at the OUTLET of most factory EFI
high pressure pumps, the INSIDE diameter of outlet nipple on the pump is
quite tiny, which is why I usually can get away with using 1/4" return
lines. The ID of the pump output nipple is the thing that limits the flow
capacity of the whole system.
Cheers,
Leon
<snip>
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