You'll want to avoid octane boosters as they are expensive and turn your plugs and combustion chambers the color of our greatest president ever skin color

Octane boosters are good for evaluating "false knock" during tuning.

It's the MMT in the boosters that turns orange.

 

Well I've had the heads done for awhile and am wrapping up the build. I am wondering what I should gap my plugs at? I got some tr55s and everyone seems to have a different answer (ie .04 for every 50 hp, etc...). 6.0L with flat tops, decked, milled 317's, ~10.6:1 CR, 222/232 cam.

Thanks

 

to tell how much compression you can get “away” with you should do a dynamic compression calculation

 

I would gap them at .040