[Healeys] Heat management

[Bob Spidell]

Oops ... should be ' ... if the vapor pressure of gasahol is HIGHER than 'real' gas ...' 

bs 

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Bob Spidell - San Jose, CA 


On my latest 4K mile road trip through the Southwest I was having apparent vapor lock problems when the engine and fuel lines were heat-soaked; i.e. after driving in hot weather, shutting down then restarting after 30min or so. At startup, the engine would stumble a bit until I got moving and got some air circulating. I'm thinking maybe a ceramic coating of the manifold and downpipes might alleviate this problem. Also wondering--this is mostly a pipe dream--what coating the entire exhaust system would do. I would think at least it would lessen the heat under the driver. 

I haven't had this problem until the last few years, which coincides with the greater prevalence of alcohol-laced gasoline. I can't prove a correlation, but if the vapor pressure of gasahol is lower than 'real' gas then it could be the cause. We tried to find a station that pumped pure gas for comparison, but east of CA--and in most of CA--the pumps all read 'Contains Ethanol.' 


bs 

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Bob Spidell - San Jose, CA