Spark plug heat range

[Ed Garcia]

I attribute the slightly longer heat up time to the vaporizer. 

As we all have probably learned while reading about LPG systems, the vaporizer actually chills down while it is in operation when it vaporizes liquid LPG into gas.  It will actually freeze if it is not heated by the engine coolant/heater line.  This cold temp is what "delays" the heat up time of the engine.

On Thu, Sep 18, 2008 at 8:15 PM, Greg Buenas <gbu...@gmail.com> wrote:

Interesting read about side gapping the spark plugs.  Thanks!

My installer recommended i change my plugs to one step cooler. The only thing i noticed is that it takes a little longer to heat up the engine.

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[Eric Punzalan]

correct papa ed!

The LPG (liquid) absorbs the heat from the engine coolant as it (LPG) turns into vapor.

Starting with gasoline helps in the warming up process :)

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Eric R. Punzalan PhD
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DLSU-Manila

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[Greg Buenas]

Ed, Eric,
Do i go back to the manufacturer recommended spark plugs or sick with the colder heat range?

Tnx!

[Ed Garcia]

I would stay with the engine manufacturer recommended plug.  While I can see that my spark plugs are white on the porcelain, a sign of plug running hot if it were gasoline (should be slightly gray if gasoline), I would attribite it more to the fact that LPG burns with far less carbon deposits than gasoline and so the porcelain stays white and is not really a sign of hot-running plugs.

[Greg Buenas]

Thanks for the info sirs!