Plugs

Hey Fellas.. Should be firing up my stroker 408 Cleveland in a few weeks. It is 12.7 to 1 compression. N.A. application. Plug recommendations?

Thanks!

747JetMech wrote:Hey Fellas.. Should be firing up my stroker 408 Cleveland in a few weeks. It is 12.7 to 1 compression. N.A. application.  Plug recommendations?

Thanks!

What plug thread dimensions and seating type does that head you are using require...?

Randy. With all the different heads out there, I didn't specify what head. Scatter brained to say the least.. OEM 4V Cleveland..

Thanks

PS: I will post the numbers after it hits the dyno. Getting excited! ( 2 years! )

NGK UR4 or UR6 (colder)

747JetMech wrote:Randy. With all the different heads out there, I didn't specify what head. Scatter brained to say the least.. OEM 4V Cleveland..

Thanks

PS: I will post the numbers after it hits the dyno. Getting excited! ( 2 years! )

With that compression ratio, I would use an Autolite AR23; an AR133 if there is a big dome on the piston.

Thank You...