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1. 01:12 PM - Re: M-14 AUTO FUEL (Cliff Coy)
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| Subject: | Re: M-14 AUTO FUEL |
It is possible to run the M-14P on Autofuel with some caveats.
Remember the whole point of octane rating is to suppress detonation and
pre-ignition.
As compression rating increases, the risk of detonation and pre-ignition
increases. Therefore in high compression engines or engines which
increase the manifold pressure (supercharged and turbocharged engines) a
higher octane rating is required.
Motorstar (the current engine manufacturer) recommends an MON octane
rating of no less than 91.
Automotive gasoline is rated by the RON+MON/2 method.
Aviation gasoline is rated by rich operating mixture/ lean operating
mixture (ie. 100/130)
Therefore I don't recommend using an automotive fuel of less than 94 octane.
As stated previously, do not use auto fuel which contains alcohol..for a
number reasons.
Most notably, it will attack the seals and diaphragms in the fuel system.
Finally, I would recommend that if autofuel is used, that it's mixed
with Avgas because:
1) The Avgas will raise the octane rating.
2) Avgas is very stable and will not degrade like autofuel.
Hope this helps!
Cheers,
Cliff Coy
Gesoco Industries
bob tripp wrote:
> <btripp@interisland.net>
>
>
> Is it possible to run the M14 on auto fuel? I've heard rumors that it
> is possible, but I can't find anything in print on it. If it is
> possible, what modifications have to be made to the engine?
>
>
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