396 NA Plug Recommendations
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Registered User
Joined: Jan 2000
Posts: 47
From: Des Moines, Iowa
396 NA Plug Recommendations
I'm needing to get plugs for my new 396. It will be NA, running at 11:1 compression. Would I be ok with the 555s, or is there a different plug that someone would recommend?
Thanks
Matt
Thanks
Matt
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Re: 396 NA Plug Recommendations
The rule-of-thumb is to drop one heat range colder for each 70HP added. Running N/A, I run an AutoLite 103 (2 steps colder than stock) with a 500HP 381 (10.8:1 CR).
Registered User
Joined: Nov 2001
Posts: 2,985
From: In a house by the bay
Re: 396 NA Plug Recommendations
Good rule of thumb. 
Don't just stick em in there and forget it either. Only takes a second to pull a plug and see how things are going. Then you go from there.......
-Mindgame
Don't just stick em in there and forget it either. Only takes a second to pull a plug and see how things are going. Then you go from there.......
-Mindgame
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