Quote:
Originally Posted by jdroison
the lead in the gas did act as a lube on the valve guides, like in the IHC regular which ran on kero originally. the valve guides needed a mod when going to unleaded.
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this was not because of unleaded, my dad had 2 regulars he ran in the 50s and early 60s on regular leaded gas, they had to have the guides trimmed to prevent sticking, had to do with the diff burning temps of the gas over the kero.
they are both running well still today.
