VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1933-1936 Original K11 Spark Plugs Equivalent

Does anyone have a chart that tells the AC Delco equal to the original K11 spark plug?

It would be C49 in Delco, but I don't know if they are discontinued. I use Champion UJ12

Are you using that plug in a 1935 207 engine?

My car is a 1936 with basically the same engine. the info I gave was from the cross reference pages of a spark plug catalog.

C49 is a very hot commercial plug and has not been available from ACDelco for a long time. The current plug that seems to work well for me is the ACDelco R45 (in my 31, 39). I am presuming you are inquiring about a Chevy application, if not let us know what it is.

Dave

Thanks, yes it's a Chevy. Is the heat range in a R46 too hot. I recently aquired a set.

R46 will work fine, probably very close to the right heat range.

Dave

AC still sells new 45R spark plugs. I have used them in everything with good results.

Thanks all. Much appreciated.