300 shot spark plugs
08-15-2008, 05:14 PM
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300 shot spark plugs what plugs and heat range do I need for a 402 with 11.5-1 compression with Trick Flow heads and a 300 shot. The plug refrence chart doesnt list plugs for the Trick Flow heads for a LS1 just LT1's.
08-16-2008, 12:29 AM
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you need a tr8 Its listed in the faq. as far as the part # I have ran the tr7 with a 200 shot and up to a 250 but melted one plug. Good luck and make sure you have your timing retarded. I would start at a 200 shot and work your way up. Better safe then sorry.
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08-18-2008, 08:07 AM
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I wouldnt use a projected tip plug such as this from what I have heard. I just ran a big shot at the track with some non projected "tr8's" Part number r5671a-8 #4554.
I havent checked them yet but i dont think there are problems. I gapped them at .030" and rounded all the edges off.
I havent checked them yet but i dont think there are problems. I gapped them at .030" and rounded all the edges off.
08-18-2008, 09:08 AM
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#4554 is a non tapered seat plug.
I wouldnt use a projected tip plug such as this from what I have heard. I just ran a big shot at the track with some non projected "tr8's" Part number r5671a-8 #4554.
I havent checked them yet but i dont think there are problems. I gapped them at .030" and rounded all the edges off.
I havent checked them yet but i dont think there are problems. I gapped them at .030" and rounded all the edges off.
08-19-2008, 10:01 AM
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GVZO6 was correct insaying the 4554 plugs are NOT tapered, i took them out and double checked. Perfectly flat. I apologize for the arguing, you are correct.
08-19-2008, 10:11 AM
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Just ordered the, b8efs 1049 ngk plugs, i would advise the OP to purchase these as well. Maybe consider one heat range colder depending on your setup.
08-19-2008, 07:38 PM
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aight i know i need a tapered seat and a resistor plug but what about a projected vs a non-projected tip?
b8efs's are they resistor or not?
b8efs's are they resistor or not?
Last edited by BigDB; 08-19-2008 at 08:55 PM.
08-19-2008, 11:16 PM
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NO, but they work fine for people, i never had problems.
IMO, anything over 175 shot id go non projected, much less apt to blow up ground straps and cook cylinders. I shot a 250 this weekend with timing pulled, race gas, and those type of plugs, plugs looked just fine....
IMO, anything over 175 shot id go non projected, much less apt to blow up ground straps and cook cylinders. I shot a 250 this weekend with timing pulled, race gas, and those type of plugs, plugs looked just fine....
