Hi Mark Your plan to recalculate fuel to help prevent vapor lock sounds good. After looking at your picture I see two simple things that could be done to help prevent the heat that causes vapor lock. Your plumbing is tightly grouped in the lower portion of the firewall between the mount. It looks like this is the exit area for cowling air. These parts will be blasted with heated air from the engine, and radiated with heat from both the firewall and the two exhaust pipes. You could build a shield around that area and pipe cool air from the pressure side of the cowl to keep the reflected heat from soaking into the plumbing. Secondly you could use fire sleeve to provide more insulation to the actual plumbing. Piper isolated it's pump and gasolator under a shielded area.
Orma Southfield, MI N110LR Tweety, old enough to drink this year Flying and more flying, to the gathering or bust http://www.kr-2.aviation-mechanics.com/
