I am just trying to figure out the optimal spark plugs to use with my 2.3liter stoker. Ported head, with springs and retainers, new valves. 50 trim turbo? I am currently using BPR8ES.

Thanks

 

those should work nicely, gap them tight to around .20

we actually had to go to a non protruded tip iridium in ours over 26psi

cb

 

From logging, I found that I lose power when I gap mine from .28 to .26 I also have a set of non protruded Iridiums in right now (BR8eix or something like that) and they seem to have lost some power. Haven't confirmed this with a log though.