What is the best spark plugs for 1999 HP500 Carb

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08-21-2010, 08:36 PM

NJDave

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What is the best spark plugs for 1999 HP500 Carb

Guys I want to replace the spark plugs on 2 Hp 500's and want suggestions. What is the stock plugs?

08-21-2010, 11:34 PM

Young Performance

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The stock plug is an AC MR 43T. I use NGK BR6FS.
Eddie

08-22-2010, 08:20 AM

NJDave

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Quote:

Originally Posted by Young Performance

The stock plug is an AC MR 43T. I use NGK BR6FS.
Eddie

Thank you. What do you think about the NGK Vpower plugs?

08-22-2010, 07:50 PM

apollard

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Quote:

Originally Posted by NJDave

Thank you. What do you think about the NGK Vpower plugs?

IME, a marketing gimmick. Caused a stall at low temps (below 50F!) in the Dodge tow vehicle. Put in fresh Vpowers, stalling occurred. Changed back to old Champions, no stalling. Reinstall Vpower, stalled.

So, I don't run them in anything now, went back to the AC/Delco or Champions. YMMV of course.

Last edited by apollard; 08-22-2010 at 07:53 PM.