I am running a 426 wedge with factory Cross Ram. Mopar Performance steel replacement heads (MW). 12.2:1, with a large roller cam. .680" or so. I have run Autolite 72's in this car for years. I also run an MSD 6AL with a blaster coil. I typically gap the plugs at .035. I have two questions:
1. Should I run a different plug?
2. Am I gapping them correctly?
Thanks in advance for any help you can give. I'm trying to hit a Test and Tune this weekend for the first time in three years. Can't wait to get the old girl out, but am prepared for issues from sitting.
Drain all the old gas out and get all new race fuel, on the gap the wider the gap the more voltage the coil will have to build up to jump the gap, the better it will idle when cold and hot
The 6AL may be okay, I would set the gap at .045 and see how it runs, if it starts to miss in the upper RPM, above 6000 RPM then set it at .035 and see if that makes the miss go away
I have race several different M.W. motors in several different cars and classes,I always used the MSD race boxes from the old 404B and 404C to the current 7AL2, never treid the 6 series boxes so no real help on them, sorry
I would buy two sets of plugs,# 72 and 73 and try both set at the same gap and see which one you like the best after using both sets
M.W. motors rock
