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You can surely set up a 413 to run really well on
both LPG and Petrol, if I can do it I am sure you can do it too :)
Btw, I like that technocarb mixer that was shown on
the webpage of the proopaneguy. Allthough I must say that it is very high on the
dollar!
I paid about $200 for my Sprintgas Mixer and it is
doing a very good job on my 413 in combination with an OMVL R90
regulator.
Rob
----- Original Message -----
Sent: Friday, June 22, 2007 5:49 AM
Subject: Re: IML: LPG Conversion
Hi Tom:
I did send out an e-mail asking what was suggested for a 69 440 in an
Imperial.
I think the only thing that matters is the engine size and carb type. If
they have something for a GM 454 I am sure it would be close enough to the
correct size (capacity) for a 440.
Note that they also have special cam grinds which was something I was
wondering about.
I bet that you could set up a 440 (or 413 or hemi) to run really well on
propane if you did it right and only used propane.
-----
Original Message -----
From: "Tom Scott"
To:
mailing-list@xxxxxxxxxxxxxxxx
Subject: Re: IML: LPG Conversion
Date:
Thu, 21 Jun 2007 19:07:27 -0400
Fred,
Are you going to contact him? Most of the
references appear to be for Chebbys.
Tom
----- Original Message -----
Sent: Thursday, June 21, 2007 4:59
PM
Subject: Re: IML: LPG
Conversion
I just spent a little time on Google.
Check this site out for propane conversions.
-----
Original Message -----
From: "Rob van der Es"
To: mailing-list@xxxxxxxxxxxxxxxx
Subject:
Re: IML: LPG Conversion
Date: Thu, 21 Jun 2007 20:30:27
+0200
Hello Eric,
Nice to see that you are interested
in LPG conversions too.
Funny to notice that the price for LPG in
your
area is amost the same as in my place in the
Netherlands.
I have filled my tank today and the actual price at
the moment here is $1.99.
The price of petrol triples
that..
The drop in fuel economy was 10 % in my case,
and I
didn't notice a power drop.
I have used parts that should be
available too in the US.
The convertor is made by OMVL, an
Italian
company (most LPG convertor factories are in
Italy
actually), I have used type R90/E big
block version (up to 8
litres).
The gas intake ring on the carby comes from
Australia and is made by SprintGas, it fits
perfectly on an
Edelbrock carb or a Carter.
You are right as far as the
compression ratio
is concerned, due to the high octane rate of
LPG (typical 110 in my country) you can go has
high as 12:1
without the risk of pinging.
You can also advance the ignition a
lot, I have
set mine to 12.5 degrees BTDC at the moment but
got
even better results with an advance of 14
degrees BTDC! However,
since I run a dual fuel
setup I risk pinging then when switching to
petrol in the case that I run out of LPG.
To be safe in that
situation I have set it to 12.5 degrees BTDC.
Robert
-----
Original Message ----- From: "Eric"
To:
Sent: Thursday, June 21, 2007 8:03
PM
Subject: IML: LPG Conversion
> LPG conversions have
interested me in the
> past. It's about $1.99 a gallon in my
area,
> whereas premium petrol is currently running
>
$3.16. Depending on the gas metering valve,
> it's reported that
a 10-20% drop in fuel
> efficiency can be expected.
> I'm
to the thought that if one ups the
> compression ratio that this
can offset this
> decrease in efficiency. I've read that the
> 105-110 octane that LPG provides has a
> corelation to
about a 12:1 compression ratio,
> which is an easy swap to
aftermarket HP
> pistons in a 440.
> LPG also responds to
recurving the ignition
> advance but I'm not sure if a slower or
> faster advance is preferable.
> Rob, have you tried any
of these alterations to your motor?
>
> Eric
> 1964
Crown Coupe
>
__________________________________________________________________
>
Btw, if you need any further information about the LPG conversion
please
> let me know.
>
>
> -----------------
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Fred Joslin
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