Hi, which spark plugs ale the best for the superchargered engine?

Thanx Monik ...

 

Im running NGK TR6's

 

I use NGK TR7ix's. This is what NGK told me I would need. An iridium plug, two heat ranges colder than stock.

 

OK thanx !

 

I use Ac Type R42LTS I believe, one of the guy's on line reccomended it and he's running a higher compression than me. Supposebly the coldest plug ac makes for the LT1 and it's run great on mine so far. Should be colder than anything NGK makes.
I reccomended it to my buddy running a 6spi procharger on a stock LT1 he had the NGk's and was happy he made the switch.

 

Will the LT1 spark plugs fit in my old 327 too?! If not what plugs are good for a 142 blower at 5-6psi?! Thanks---