David/ Phil , you are both right on the spot with the Avgas issue for high compression super-charged engines . My engine is a low compression version and it used to thrive on 80-87 Octane leaded Avgas ( Red) . It contained four times less lead than today's 100 LL ( Low lead) Avgas ( Blue ) . Warbirds used to run in 100-130 Octane Avgas ( Green ) . Those were the days ! Still, for HMV's 100 LL Avgas mixed 75-25 with Shell V Power Super Unleaded with no Ethanol crap is the best way to go : Lead to lubricate the valves , NO vapour lock and long long lasting in the tanks. Works perfect in my Continental C-145 2H air cooled windmill . Cheers . Thanks for adding to the discussion .
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44 GPW / 44 C-15-A Cab 13 Wireless 5 with 2K1 box X 2 /
44 U.C. No-2 MKII* /
10 Cwt Cdn Brantford Coach & Body trailer /
94 LSVW / 84 Iltis
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