OK - SIMPLE QUESTION ABOUT WHICH AUTOLITE SPARK PLUG?

Hey, guys. Street driven 460, CJ hydraulic cam, approx. comp. ratio 10.5 to 1, A429 aluminum CJ heads. What Autolite spark plug would you recommend?

Wayne (SAWDOFF) Pearce

I'm using 3924 plugs. The aluminum head runs better with a one step hotter plug than an iron head all things being equal. I have a 10.5-1 521 with A 429 heads and aggressive hyd roller. Street driven dual fours on a Blue Thunder dual four intake.

gt350hr wrote:I'm using 3924 plugs. The aluminum head runs better with a one step hotter plug than an iron head all things being equal. I have a 10.5-1 521 with A 429 heads and aggressive hyd roller. Street driven dual fours on a Blue Thunder dual four intake.

YES ... 3924.

Thanks a lot, guys - got em ordered.

Wayne

Thanks guys, got em ordered.

Wayne