Spark Plugs??

just a quick question. what size spark plugs are you ruining with the aluminum head ? I have tried AutoLite AR3934 and 5224. just wanted to know what others are using.

Thanks

Bill

I'm running Autolite 3924's.

I relied on the shop doing the work to install the plugs that Mike recommended some time ago. I would have to go back through the emails to confirm that these are correct.

Ric.

I'm running the Autolite Racing AR3934

AR3933s for us.
But they would probably foul up eventually in a N/A motor.

Will

So what's the difference? Temp?

Ric.