[Healeys] gas/alcohol

[Michael Oritt]

Running on may be the result of several different factors including
incorrect timing, carbon in the combustion chamber and high engine
temperature.

On Mon, Sep 2, 2024 at 4:34 PM Robert Markovich via Healeys <
healeys at autox.team.net> wrote:

> Wonder whether today’s ethanol fuel contributes to the run-on (dieseling)
> many Healey owners experience. If you’re lucky (and have set carbs and
> timing correctly), you can solve the problem by flooring the gas pedal
> after turning off the ignition and inundate the cylinders with air,
> especially on a BJ8 with its larger HD8 SUs. Otherwise, as on my BN7, you
> must stall the engine by lifting the clutch pedal in fourth to keep it from
> running on. Am trying Techron combustion chamber/fuel system cleaner on the
> chance removing built up deposits will do the trick, but we will see …
>
>
> Sent from the all new AOL app for iOS
> <https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661>
>
> On Monday, September 2, 2024, 1:01 PM, Bob Spidell via Healeys <
> healeys at autox.team.net> wrote:
>
> Living in California, I have been running 'gasahol' in all my cars longer
> than some. Best we can usually get is 91-octane; I was able to buy
> higher-octane--93 and 100--fuel at times but, guess what: the octane was
> boosted with ethanol (added water to some and measured before and after;
> don't recall the exact mix but IIRC I figured it was 10% ethanol; standard
> from the pump seems to be about 8%).
>
> I have about 140K miles on my BJ8 running mostly 91-octane gasahol, and
> there have been no negative effects save some 'vapor lock*' on starting
> when hot. I replaced the hard line to carburettor flex line that had been
> on the car for a couple decades and, except for it being a little stiff
> there was no visible degradation. About 8 years ago I put a new carb jet in
> pure/denatured ethanol and there is also no visible degradation. Rubber
> components sold since the introduction of gasahol are impervious to the
> stuff. Theoretically, due to its oxygen content gasahol could cause an
> engine to run a little lean, and at least one knowledgeable person
> recommends changing to rich carb needles, but both my cars have long since
> been tuned to run on it with std. needles. The BJ8 was rebuilt to standard
> 9.1:1 compression ratio, the BN2 is a 100M and has the 'high compression'
> 8.7:1 pistons. I've been told Healeys will run fine on 91 up to about 11:1
> compression, depending on the cam and timing.
>
> Good luck trying to 'steal' from an airport--when I owned airplanes I
> would occasionally get some--but the fuel providers aren't likely to be
> enthusiastic about selling it to you. Technically, you would owe 'road
> tax,' and the stuff is full of TEL and highly toxic (don't breathe any of
> it and don't let it get on your skin).
>
> * not technically 'vapor lock,' but the alcohol vaporizes and cavitates
> the fuel next to the exhaust manifold, causing some stumbling for a mile or
> so.
>
> Bob
>
> On 9/2/2024 7:45 AM, carl and gerry rubino via Healeys wrote:
>
> A message from Canada. For the last 30 years I have been running my 100/6
> on 93 gas with no alcohol.
> In its infinite wisdom our government is going to legislate alcohol in all
> grades of gas.
> Other than stealing gas from an airport any recommendations to deal with
> this?
>
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