i had my tr6's at like .035 or something.. i now have a plug equivalent to the tr55, its actually a champion plug tho...

same price tho. and ngk's book referenced it as a direct cross or what not...

im just trying to keep my plugs from fouling out right now since im not spraying it adn dont forsee the dyno tune happening anytime soon..

 

I would go with .050" if going n/a

 

yea n/a for the next two months till i get the dyno tune adn put the bottle back on.. thanks..

the colder plugs are fouling up a lil easier with the slightly to rich mail order tune.. causing misfires at idle.. hopefuly this will cut into that