What are you guys running for spark plugs in your cj heads. msd 6al ign,11.5-1 comp 93 oct fuel.
7 71 Puller · Registered Joined Feb 20, 2009 · 65 Posts Discussion Starter · #1 · Aug 24, 2010 Only show this user What are you guys running for spark plugs in your cj heads. msd 6al ign,11.5-1 comp 93 oct fuel.
hookin78 · Registered Joined Feb 13, 2009 · 518 Posts #2 · Aug 24, 2010 Only show this user We seem to have good luck with Autolite #25's 13.7 to 1 8000 rpm is normal on the track Iron CJ's
Mark Laczo · Registered Joined Mar 2, 2006 · 895 Posts #3 · Aug 24, 2010 Only show this user plugs Right now AR 24's may go to the 25's next. 23 are stock heat range I think.
7 71 Puller · Registered Joined Feb 20, 2009 · 65 Posts Discussion Starter · #4 · Aug 24, 2010 Only show this user What are you gapping them at.
L Lem Evans · Senior Member Joined Jan 11, 2006 · 8,535 Posts #5 · Aug 24, 2010 Only show this user If a guy has big comp. ratio and high rpm.....AR-13 and AR-12 may work good.
