I don't believe there is much, if any, correlation between octane
rating and vapor pressure, although there is some variation between
different blends (summer/winter formulations, gasahol, etc.). Any difference
is liable to be slight regardless.
At any rate, there are methods to test the Reid Vapor Pressure--the
standard method of measurement--that are used by pilots who use
auto gas in aircraft.
bs
********************************************
Bob Spidell San Jose, CA bspidell@pacbell.net
'67 Austin-Healey 3000 '56 Austin-Healey 100M
********************************************
----- Original Message -----
From: "Charley Braum" <cbaustin@verizon.net>
To: "Neil McDonald" <nimcdonald@shaw.ca>
Cc: "Healey List" <healeys@autox.team.net>
Sent: Thursday, July 08, 2004 7:48 PM
Subject: Re: Hot Problem
> Further to the 'Hot Problem' thread - is there a relationship between
> fuel octane and vapor lock (boiling). In other words, if I use a higher
> octane fuel, will I experience vapor related mis-firing at lower
> temperatures?
>
> Thanks,
>
> CB
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