The Murphy Builders Site

Posted: **Sun Feb 19, 2012 10:47 am**

Automobiles have a variable timing on them even if controlled by the
computer. Most airplane engines don't unless you go to electronic ignition,
IE,,, Jeff Rose, and not sure of all the others....
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Posted: **Sun Feb 19, 2012 10:47 am**

Yes there are auto fuel STC's (Peterson) for the 160 HP Lycs. Just
had to use premium auto, I think 92, using the R+M method but it has
been awhile. I used it all the time in a 160 hp Tripacer.

Bill

On 5/11/06, Jesse Jenks <jessejenks@hotmail.com> wrote:

I read the fuel article in Kitplanes. What I got from it is that lead is not
the issue with airplane engines, but octane, and ethanol is definately bad
because it traps water in the fuel which can freeze. It went on to say that
we could run on lower octane gas with improved ignition systems with
variable timing.
How does the 150/160 hp, car gas/avgas relationship tie in? Is car gas only
approved in 150 hp engines because detonation caused by lower octane car gas
is less damaging to those engines? Are any 160hp engines ok with car gas?
Thanks
Jesse

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The Murphy Builders Site

[rebel-builders] engines/fuel

[rebel-builders] engines/fuel

[rebel-builders] engines/fuel