[Healeys] Vapor lock gas

Alan Seigrist healey.nut at gmail.com
Tue May 11 19:27:11 MDT 2021

Just goes to show if you are driving your car regularly (like I like to do)
the trick is to not rebuild with pistons that give you too much
compression.  In fact for the BJ8 it's good to bring compression down half
a point, although in HK the fuel is good enough for standard compression.

On Wed, May 12, 2021 at 3:01 AM BJ8Healeys <sbyers at ec.rr.com> wrote:

> Nathan, I'm a little bit late with my response, so I'll just direct it to
> you.
> My two cents' worth:
> When I and my traveling companions were returning from Conclave 2008 in
> San Diego and we got to Missouri, we discovered that the highest octane
> available there was 91.  After filling up with that, both BJ8s missed and
> knocked and chugged until we got into Tennessee and refilled with 93 octane.
> Recently, a BJ8 owner called me to say he was in the area (300 miles from
> home) and his engine had begun to "click" under acceleration.  He thought
> it was a timing problem and wanted me to check that.  He mentioned that he
> had fueled up with non-ethanol.  Around here, some stations advertise
> "non-ethanol" but they neglect to say the octane was dropped from 93 (with
> ethanol) to 91 (without).  I suggested that he forget about non-ethanol and
> go with 93.  After that, during his return home, he had no more "clicking"
> problems.
> Ethanol-laced gas has its own issues (as you might remember from my Black
> Hills narrative, I had some aggravating stumbling and missing as I left
> home, due to the bad ethanol that had been in the tank too long),
> especially if the car isn't used much; but as long as I stick with 93
> octane, at least the engine runs as it should.
> Cheers!
> Steve
> -----------------------------------------
> From: "N.S. Bennett"
> To: healeys at autox.team.net
> Cc:
> Sent: Sunday May 9 2021 2:39:24PM
> Subject: Re: [Healeys] Vapor lock gas
> Thanks for the link to the MV article on ethanol and vapor lock. It was a
> good read.
> Although I'm certain this has been debated (many times) before, what's the
> general consensus on octane rating when refueling our cars?
> I've always used the highest.i can get. But reading that article has once
> again made me question my practice.
> Interested in the list's thoughts...
> Cheers!
> Nathan
> '66 BJ8
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