Scott Gettings wrote:
> Attached is a pic of the stock Renesis main fuel rail.
> > Its lines both attach near the center, and it has a device that
> appears to be a pressure damper.  It is relatively heavy, and
> really should be converted to AN fittings instead of the stock
> plumbing.

Mark Sipe replied:
> Yes, it's a pulsation damper.  The RX-8 uses a single non-returning
> line fuel system with the pressure regulator located in the fuel
> tank with the pump.

If the RX-8 indeed uses a non-returning line fuel system (and I'm *not*claiming otherwise), then what's the second fitting on the fuel rail
for?

Russell Kent

The RX-8 has 6 injectors.  The picture showed the 4-injector rail.  The
other, smaller, two-injector rail only has one fitting.

In the new version the smaller rail will be fed from the primary rail
and the smaller rail's exit will be the return line.

Both of these rails are only about 3/8" I.D.  You could drill them out
and weld in  1/8 NPT fittings, but not 1/4" fittings.  The 1/8" NPT is
much smaller ID than AN-6.

At this point, I'll probably weld in a short piece of 3/8" steel tubing
on each end, to be flared and connect to a AN-6 fitting.  The damper and
other tube will be removed.  This should be much lighter than trying to
weld larger fittings directly to the existing rail.

Scott Gettings





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