[Healeys] Subject: Re: healey overheating

[Mark Schneider]

Bob,

Most Brit cars seem to have a propensity to "run on" or diesel  after  
killing the ignition.  It is a symptom of hot spots in the compression  
cylinders.  actually glowing pieces or metal of combustion products  
serving as unwanted spark plugs.  The way I have dealt with it also  
fixed a couple of other problems at the same time.  For about 20 years  
I have bought and keep on hand a gerry can of 110 octane  leaded race  
gas.  I mix one gallon of race gas with 6 gallons of regular pump  
gas.  This gives me a calculated octane rating of about 97.  Also, the  
race gas runs cooler than regular unleaded gas and cleans the  
combustion chambers so a point where no glowing bits remain.   
Therfore, no running on. If you have access to aviation gas it works  
the same way.   Finally, another way that doesn't involve the expense  
of race gas or the safety issue of storing it is to simply leave the  
car in gear and as you switch off the ignition slowly let your foot  
off of the clutch.  As the clutch engages the drag on the engine will  
stop it pretty much immediately.

Marks 3