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Spark Plug ?

Old Mar 6, 2008 | 10:58 AM
  #1  
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Paul.Harrah
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Spark Plug ?

I have a 1984 with a 351W, It was a california truck at one time and had that computer controled carb and dizzy, well I took out the computer and replaced the carb with a holly 4412 and a Hei dizzy my question is should I run a hotter plug now since I am running a HEI? Or should I stick with the stock ones?
 
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Old Mar 6, 2008 | 01:39 PM
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stick with stock and see how it runs
 
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Old Mar 6, 2008 | 02:33 PM
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2nd that, 'read' the plugs later to figure out if you need to change the heat range, but most likely you will not need to change the plug to a different type.
 
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Old Mar 6, 2008 | 04:02 PM
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With the hotter HEI ignition .....................

You may just want to open the gap up on your current plugs which should give you a little better fuel economy and performance to boot.

Rick.
 
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Old Mar 6, 2008 | 04:06 PM
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What do you think I should open them up to ?
 
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Old Mar 6, 2008 | 04:14 PM
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What do you have them gapped at now?

Whats the factory spec for this engine?

Rick.
 
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Old Mar 6, 2008 | 04:26 PM
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I am not sure right now I will check after work.
 
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