To answer some questions on the fuel plumbing at the fuel regulator -

The fuel system feeds from the left tank using 3/8 al. tubing into parallel high pressure fuel pumps each with it's own outlet side GM filter.  The pumps and filters are mounted on the floor between the rudder pedals (RV -7A).  Output from the pumps and filters goes to the firewall using 3/8 al. tubing.  From there 3/8 SS. Airquip hose feeds the primary fuel rail.  Out of the fuel rail a 3/8 al. pipe connects the lower primary fuel rail to the upper secondary injector fuel rail.  (Based on comments I will install an Adle clamp on this tube.)  A 3/8 SS. Airquip hose connects from the secondary injector fuel rail to the inlet of the pressure regulator.  The regulator return line exits the bottom of the regulator and returns fuel via. 1/4 al. tubing to the left tank by being tee'd into the fuel line from the right tank.   The right tank fuel is pumped to the left tank - copied from Tracy.   The regulator is also plumbed with a small-orifice bypass al. tube tee'd into the fuel return line.  This line exits left side of the regulator.  This bypass orifice was installed to quickly get rid on any air or vapor lock in the system.

I will check into replacing the 1/4 al. tubes at the regulator and from it to the firewall with SS Airquip hose.  If this can't be done on some of the short hose I'll add dampening or additional support. I believe I have enough hose and fittings left over to accomplish this!!

Did Al Wick or someone else have an inexpensive source for a variable frequency strobe?  I may be able to borrow one but don't know if it is still available.

I want to THANK EVERYONE for the review and all the comments.   I hope to assemble the A/C and have it in the air within 90 days.

Dennis H.

Rich wrote: