Which 14mm Spark Plugs to use?
 

Since the Bosch plugs everyone touted as being so great have been discontinued, which 14mm spark plug is the 'hot ticket' now to use on a 'Z' headed engine with stock-type plug wires?

TIA!!

Re: Which 14mm Spark Plugs to use?
 

Brent,

Good thread, and i will watch every answer.....
I have never been able to get a 14 mm plug to work well in a model t . I have three cas and drive them more than most and just cant ever get a 14mm to work.....:confused:

Re: Which 14mm Spark Plugs to use?
 

I never tried the 14mm plugs but I tried all the others and have found the good old Champion X to be the best but just barely edging out the Autolite plugs.

Re: Which 14mm Spark Plugs to use?
 

What plugs did the Simple T have in it?

Re: Which 14mm Spark Plugs to use?
 

Big old champion X's.......
I miss the simple T for sure ....lowest T i ever seen :eek::D

Re: Which 14mm Spark Plugs to use?
 

I use Bosch #4003 for several years with good luck in each of my 3 T's and set them @ .065 with electronic ignition or .030 without.

Re: Which 14mm Spark Plugs to use?
 

Roy, are they still available?

Re: Which 14mm Spark Plugs to use?
 

Brent, I just checked online & they are. You might try your local auto parts store. They changed from #4203 to #4003 a year or so ago. I bought a set (spare) a few months ago.
Roy