Thread: Butler Cobra. Spark plug boots melting
View Single Post
  #21 (permalink)  
Old 08-10-2013, 11:52 AM
joyridin''s Avatar
joyridin' joyridin' is offline
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2009
Posts: 1,696
Not Ranked     
Default
If you haven't visited here, this might be of help to you:

http://www.sparkplugs.com/Data/uploa...ing_system.jpg

http://sparkplugs.com/Data/uploads/Heat_Range_Chart.jpg
Reply With Quote