plugs for 351 LPG - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

aussieG · 10-19-2003, 06:04

Went to my supplier ,he said hotter plugs for LPG
Went to the bosch plug site & they said colder plugs for LPG
Totaly confused! aussie G
Thanks for your help !

TopGhia · 10-19-2003, 14:19

Well Bosch said colder, NGK say colder, so that's 2 out of 3. Remember the combustion temps are hotter with LPG, so you need a cooler plug to dissipate the extra heat.

http://www.ngk.com.au/bulletin_T92-1.htm

Also:

Quote:

The heat range numbers used by the various manufacturers are not universal, by that we mean, a 10 heat range in Champion is not the same as a 10 heat range in NGK. Some manufacturers numbering systems are opposite the other, for American manufacturers (Champion, Autolite, Splitfire the higher the number, the hotter the plug. For Japanese manufacturers (NGK, Denso), the higher the number, the colder the plug.

cheers

aussieG · 10-20-2003, 04:56

Thanks for that.
My experiance of putting hotter plugs in motorbikes, we always ended burning holes in pistons .
CHEERS

xdc351 · 10-20-2003, 05:07

1 range lower is all you need. Never hotter!

tonyk · 10-20-2003, 18:54

Ngk Bp6fs