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 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 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 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 What are you gapping them at.
L Lem Evans · Senior Member Joined Jan 11, 2006 · 8,523 Posts #5 • Aug 24, 2010 If a guy has big comp. ratio and high rpm.....AR-13 and AR-12 may work good.