Guest Dodge Deluxe Posted March 13, 2012 Share Posted March 13, 2012 Does anyone know if a Prestolite 14R42 can be used in a '39 Dodge D11? Right now I'm running Autolite 295's. The Prestolite 14R42 is of the same thread and the same reach, but it has a longer ceramic insulator and is thus a hotter plug. Anyone familiar?Dan Link to comment Share on other sites More sharing options...
1936 D2 Posted March 14, 2012 Share Posted March 14, 2012 Keep in mind the "R" designation in the Prestolite means it is a "Resistor" style plug. Maybe some of our electrical engineers can chime in here on what that means to an older solid wire / 6V coil system. Link to comment Share on other sites More sharing options...
Guest 1930 Posted March 14, 2012 Share Posted March 14, 2012 quote..........Maybe some of our electrical engineers can chime in here on what that means ..........In case you hadnt noticed this is where I get real quiet suddenly Link to comment Share on other sites More sharing options...
Guest Dodge Deluxe Posted March 14, 2012 Share Posted March 14, 2012 I picked up a set of 6 NOS ones, brand new still in the box that's why I'm asking. The box says 1939 Dodge D11, but my concern is that they are a much hotter plug than what the manuals suggest. How would this effect things? I have read that too hot of a plug can cause detonation. It be cool to use them, but not if it's going to have an ill effect. Link to comment Share on other sites More sharing options...
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