heat range of plugs
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From: Gloucester-Spfld Mass
heat range of plugs
To me this is advanced only because it is a serious question, what spark plug should I use running a 306 cam; ported and polished heads with 200cfm maximum flow at .600; no cats into headers and no air.... colder or hotter? and what brand/type of plug??
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Re: heat range of plugs
Originally posted by grygst76
To me this is advanced only because it is a serious question, what spark plug should I use running a 306 cam; ported and polished heads with 200cfm maximum flow at .600; no cats into headers and no air.... colder or hotter? and what brand/type of plug??
To me this is advanced only because it is a serious question, what spark plug should I use running a 306 cam; ported and polished heads with 200cfm maximum flow at .600; no cats into headers and no air.... colder or hotter? and what brand/type of plug??
General guideline is reduce heat range one step for each 75HP added. An Autolite 103 (2 steps colder than stock) should work. But in any case you need to check them after running them for a while to see if they are correct.
Routine LT1 Tech...... moving it there.
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Joined: Dec 2002
Posts: 966
From: Gloucester-Spfld Mass
Re: Re: heat range of plugs
Originally posted by Injuneer
200 cfm maximum flow (intake??) sounds a bit low.
General guideline is reduce heat range one step for each 75HP added. An Autolite 103 (2 steps colder than stock) should work. But in any case you need to check them after running them for a while to see if they are correct.
Routine LT1 Tech...... moving it there.
200 cfm maximum flow (intake??) sounds a bit low.
General guideline is reduce heat range one step for each 75HP added. An Autolite 103 (2 steps colder than stock) should work. But in any case you need to check them after running them for a while to see if they are correct.
Routine LT1 Tech...... moving it there.
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