Hi, I am installing a grpA coil to my cossie 4x4 and was woundering what sparkplug gap would be the best to set it up. Its running greens, T3, msd chip with closed loop. Boost is set at 1.8 bar spike and 1.6 Bar held. Running on Motorcrafts 071's.

With standard coil at this moment running a gap of 0,6mm without any problems.

Looking for the best setting for my setup to also get the best mpg but still without misfires.

 

I ran 0.8mm on a group a coil with mine without any issues.
tabetha

 

Thanks for the comment. Was this at about the same boost as I described?

 

Pretty much the same boost yes.
tabetha