209 continental engine on propane

Propane, Butane, LPG, GPL, C3H8, C4H10
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geraldm
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209 continental engine on propane

Post by geraldm » Mon May 13, 2019 4:44 pm

Hi everyone been a while .. rebuilding a 209 continental industrial engine converted to propane and was wondering about the heat riser settings in the exhaust manifold ( typical old 2 piece that bolts together ) should it be set differently than it was for gasoline. the casting simply says on --off . im guessing it should be set to deliver max heat for the propane . the old towmotor forklift it is going back into does very little work , mostly just puttering in the yard moving a few things around now and then. will it even make any difference on keeping the propane a gas. thanks Gerald..
Now how the hell did that happen ?

storm
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Re: 209 continental engine on propane

Post by storm » Tue May 14, 2019 3:44 am

I personally would have it set to off. Why? Heat risers are there to heat up the intake to help liquid fuels (petrol) atomise. LPG is already a gas and doesn't need heat in the air stream to help it atomise.
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geraldm
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Re: 209 continental engine on propane

Post by geraldm » Tue May 14, 2019 10:42 pm

Thank you for your time Storm .
Now how the hell did that happen ?

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BigBlockMopar
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Re: 209 continental engine on propane

Post by BigBlockMopar » Fri May 17, 2019 7:02 pm

In addition, a heated intake-charge will expand the air/fuel-mixture and therefore less of it will be available to the engine per cycle to extract power from.
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Tom68
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Re: 209 continental engine on propane

Post by Tom68 » Sat May 18, 2019 5:48 pm

geraldm wrote:
Mon May 13, 2019 4:44 pm
Hi everyone been a while .. rebuilding a 209 continental industrial engine converted to propane and was wondering about the heat riser settings in the exhaust manifold ( typical old 2 piece that bolts together ) should it be set differently than it was for gasoline. the casting simply says on --off . im guessing it should be set to deliver max heat for the propane . the old towmotor forklift it is going back into does very little work , mostly just puttering in the yard moving a few things around now and then. will it even make any difference on keeping the propane a gas. thanks Gerald..
On the other hand a heated inlet charge needs less ignition advance, if you have limitations on how much advance you can add intake heat will ensure a fast flame front that'll be less taxing on the cooling system and easier on exhaust valves.

Better to run a cool inlet charge and adjust ignition point to suit though.

storm
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Re: 209 continental engine on propane

Post by storm » Sat May 18, 2019 9:55 pm

Tom68 wrote:
Sat May 18, 2019 5:48 pm
On the other hand a heated inlet charge needs less ignition advance, if you have limitations on how much advance you can add intake heat will ensure a fast flame front that'll be less taxing on the cooling system and easier on exhaust valves.
Yes and No, well actually just No.

What you are actually referring to is air density not air temperature, less advance is required when the air is less dense. Heated air is less dense than cool air, also the higher you go above sea level the less dense the air is due to air pressure.
Tom68 wrote:
Sat May 18, 2019 5:48 pm
Better to run a cool inlet charge and adjust ignition point to suit though.
All else being equal cooler air entering the engine is much better. The density of the air entering the engine has a direct impact of engine efficiency, heat the air and you lose efficiency.
Every job is a self-portrait of the person who did it. Autograph your work with excellence.

Fuel flow requirements calculations viewtopic.php?f=5&t=1638

geraldm
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Re: 209 continental engine on propane

Post by geraldm » Sun May 19, 2019 9:01 pm

thankyou everyone interesting comments
Now how the hell did that happen ?

geraldm
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Location: Pump handle Saskatchewan

Re: 209 continental engine on propane

Post by geraldm » Thu Jul 18, 2019 9:06 pm

https://youtu.be/Rer5J2HPSIw engine refresh went great
Now how the hell did that happen ?

storm
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Re: 209 continental engine on propane

Post by storm » Fri Jul 19, 2019 12:43 am

geraldm wrote:
Thu Jul 18, 2019 9:06 pm
https://youtu.be/Rer5J2HPSIw engine refresh went great
"This video is unavailable" says Youtube.
Every job is a self-portrait of the person who did it. Autograph your work with excellence.

Fuel flow requirements calculations viewtopic.php?f=5&t=1638

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