HP500 spark plugs
#3
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The stock plugs were a tapered seat plug. The Brodix heads run a gasketed plug. If you didn't make many other changes, then you will want to stick with the same heat range. In the Brodix head, I use NGK R5671A-7. That is a gasketed seat plug that works with the Brodix heads. The stock cast iron heads use an NGK BR6FS in a standard plug and a R5673-7 in and NGK Racing plug. Hope that helps.
Eddie
Eddie
#5
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I have a 540 with Brodix iron heads, I'm pulled a plug (so I knew what to buy) it was a ngk BPR6FS, I went a head & changed them but come to find out the other 15 plugs were Champion RV15YC4..... WTF
my question is am I ok with the BPR6FS NGK's (gap set at .038) is this a safe heat range for a n/a 540 with 600+hp?
thanks
my question is am I ok with the BPR6FS NGK's (gap set at .038) is this a safe heat range for a n/a 540 with 600+hp?
thanks
Last edited by Ran-Dom 32; 05-09-2012 at 02:09 PM.