Actually the burnt valves (root cause) were caused by an intake vacuum leak causing a lean mixture on the drivers side. The Intake valves were coated with bits of carbon after using Sea Foam. Low octane fuel only exacerbated the condition.

The highest elevation near me is 180 Ft.
Premium is 4.42 per gal.
Burnt valves running low octane fuel in high performance engine. 5.4 DOHC 32 valve.

I only use premium fuel in my MELs Rev A 3/6/22 Octane? Octane is simply a measure of how much heat and pressure a fuel can withstand before exploding, and in tandem with a properly designed engine a higher octane fuel can increase performance and efficiency while decreasing emissions. Octane issues...

How to Set Timing w/Vac Advance This is a guide to making timing advance adjustments. A Sun distributor machine such as a Model 503 would be the preferred method. 1. Disconnect the vacuum line from vacuum advance control to the vacuum port on bottom of carb and plug the port on the carb. 2. Set the ...

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