Author Topic: what plugs do you use  (Read 1147 times)

Offline OUTLAW

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what plugs do you use
« on: June 17, 2011 - 08:13:07 AM »
My small block has 13:1 compression-fairly large carb (850 )- and a fairly large cam  (284/292* -.533/.552 lift)-
itis mostly street driven to cruise nights and an occaisonal WOT run down the street. what plug (and heat range) and gap would you use




Offline Chryco Psycho

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Re: what plugs do you use
« Reply #1 on: June 17, 2011 - 10:50:23 AM »
Well after proving on a dyno that the more you spend on a plug the more power you will LOSE , I lean towards the standard Champion RN12YC or RN14YC , use the colder plug , if you get any fouling move to the hotter plug , I would gap @ .040 if you have a high output coil , .035 if you have a std coil
 You could also use Autolite plugs , not sure of the heat range / #s for those

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Offline OUTLAW

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Re: what plugs do you use
« Reply #2 on: June 17, 2011 - 12:41:49 PM »
ya I have a super coil and solid copper wires been running n14yc at .040 but the seenm to foul pretty easy - tried down jetting the primary to 64s but still loads easy -hate to go too lean on the primaries - I like Bosch plugs but around here all they carry are the platinums and 4 prong silvers and I hate both of them ,,,lol
guess I am gonna have to go to NGK (never liked them either ) or Autolites

Offline 7Dcuda

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Re: what plugs do you use
« Reply #3 on: June 17, 2011 - 01:53:03 PM »
I run the Copper Champion RJ12YC's gapped at .045 in my mild street build 440 with High Output Coil.  I've sampled many but have settled on this plug as working the best for me.

Offline TreeFrog

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Re: what plugs do you use
« Reply #4 on: June 17, 2011 - 03:48:58 PM »
standard Champion RN12YC or RN14YC
65 Satellite     361 Ruby Red Poly
72 Challenger    360 Top Banana     
73 Challenger    340 Triple Black
87 Dodge Ram     318 Blue
88 Dodge Ram     360 Grey (+)
04 Jeep Grand Cherokee Limited 4.7L Pewter Met.