Re: IML: Propane on Imperials

["Frank Winnips" <frank@xxxxxxxxxxx>]

The enhanced smoothness of LPG is probably more related to the carburation.
One of my Imp's had a totally worn carb and consequently ran awfull on
regular gas. Once converted to LPG with an IMPCO system, the engine ran very
smooth again.
While engine wear is lower, LPG does wear down a carb faster than petrol
because of the lack of lubrication. Since I have installed a new carb, I
take care to run petrol once in a while.

Frank
72 coupe (2)
The Netherlands

----- Original Message ----- 
From: <dardal@xxxxxxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Thursday, December 23, 2004 2:35 AM
Subject: Re: IML: Propane on Imperials


> Quoting Lib596@xxxxxxx:
>
> the price difference is marginal.
> >
> > D2 mentioned the loss of power when using propane but unless you like to
> > drive at full throttle you would hardly notice the difference. Since it
is a
>
> > dual fuel system, if you feel the need for that extra bit of fire you
can
> > always
> > switch over to gas.
>
> Usually (but not always) the propane hardware add restrictions in the air
> cleaner that reduce perormance even when you are on on gasoline.  The
higher
> the rpm, the more the impact.
>
> In addition, propane actually runs  smoother because is
> > has an octane equivalence of around 112.
>
> You will not be able to take advantage of the higher octane, unless you
increase
> the compression ratio.  If you rebuild your engine with, say 12:1
compression
> ratio, then you won't be able to run on gasoline.  Even with an increased
> compression ratio, you will not regain the power losses due to the
decreased
> volumetric efficiency of the gasious fuel, sorry.  Its hard to believe
that the
> propane will make the engine run "smoother".
>
> > driving an American luxury car is the boulevard ride. Propane  actually
> > enhances that feeling and the engine runs quieter.
>
> That's hard to beieve either.  The type of fuel will have no effect on the
noise
> coming from the exhaust.  The added restrictions in the intake could
potentially
> have some effect in the intake noise (positive or negative), but if the
> restriction is that large, then the power loss is very serious.  Also,
intake
> noise is usually low unless under WOT.  The advantage of propane is that
it
> burns cleaner, so the oil may stay cleaner, and if the engine is used in
short
> trips, the deposit formation may be reduced.  And of course its cheaper in
> Europe.  But if power and speed is not your cup of tea, that's also
perfectly
> acceptable.
>
> D^2
>
>
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