Spark plugs in alum.heads

[joelrpo687]

I'm almost ready to fire up my 64 Fury with stealth heads and a sommit ignition box on a 440 engine.What would you use to lubricate the spark plug threads-what is a good starting gap for the plugs.My motor is supposed to make 500 hp. 440 source sold me the Champion RC12YC.Either hemi-itis or superstocker preferred the Ngk 5672A-7 plugs because of the electrode's falling apart and hitting the piston ( I know they run crazy horsepower) I'm thinking I should get the NGK plugs.I've bought 4 dipsticks already=what's 2 sets of plugs? Thanks

 

[Stumper]

Never seeze is a good addition on plugs in an aluminum head. I can't say that I find one brand of plug better than the other - would definitely not bother with $5 "zurconium" laser plugs, if you know what I mean. You will need to watch your heat range though. The 12YC plugs are stock heat range. If you've upped the compression any or increased cam, etc. you may find them too hot. They are a good starting point for though for a mild build...

 

[RustyRatRod]

Use this on the plugs.

http://www.permatex.com/products/au...ubricants/Permatex_Anti-Seize_Lubricant_a.htm

Also, never try to remove the plugs while the engine has any heat left in it at all. It should be dead cool. If it was mine, I'd try the plugs at .045".

 

[67 B-body]

I use the copper anti-seize for aluminum heads....

 

[CrazyBoutRacin]

I’ve read where many are not using anything on aluminum heads. The idea is the threads need the best conductivity to the head it can get, with anti-seize affecting that. True or not? I don’t know, but I quit using it years ago and never have had issues since.

 

[matthon]

NGK @ .045.
I can't recall the exact plugs at the moment, I want to say the Champion equivalent, BKR5ES, but iirc I went a bit hotter or colder.

 

[khryslerkid]

I’ve read where many are not using anything on aluminum heads. The idea is the threads need the best conductivity to the head it can get, with anti-seize affecting that. True or not? I don’t know, but I quit using it years ago and never have had issues since.

NGKs have pre lube impregnated into the coating. They don't recommend any anti-seize. Might be other brands the same way.