Edlebrock RPm heads, Vortech - what autolite plug?

321 Views 5 Replies 4 Participants Last post by Frank n Sons, Oct 27, 2002

Frank n Sons

Discussion Starter · Oct 25, 2002

We have been using, as per Edlebrocks suggestion, Champion RC12YC plugs in 3070 with no problems. We have now added a blower to the car and have been told by Vortech that we will need a one range colder plug. I'd like to go with Autolite. The RC12YC Champ plugs = AR3924 Autolite. The question is: Is the Champ RC9YC one step colder? It cross-refs to Autolite AR3923 which sounds right as it is one number less than stock. Anybody? Bueller? Bueller?

Frank n Sons.

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RoadRebel

· #4 · Oct 27, 2002

Frank,

If you find in a few weeks that it seems to be hard starting or misses with the 3922. Then use the 3923's. THe 3922 are pretty cold and may not self clean.

Phil

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