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-   -   Best Plugs for 454 (https://www.offshoreonly.com/forums/general-q/211255-best-plugs-454-a.html)

frantic 06-18-2009 10:49 AM

Best Plugs for 454
 
Hello Everyone,

I just joined this forum and wanted to find out if anyone knew which plug is best for the 454 mercruiser 7.4 with rochester carb and after market mainifolds on a 1990 27 foot switzer race boat. I bought the ac delco r43t and the boat ran hard. Was interested to know if any one knew if i should run the NGK Br6fs plug and would it be the better choice.

thanks,

jeffswav 06-18-2009 10:59 AM

I have used them all. Right now I use the AC Rapid Fire. A little more money.

team Tickfaw 06-18-2009 01:18 PM

Using the NGK BR6FS right now without issue, but did not have any issue with the MR43T either. Just changed cause someone suggested.

frantic 06-18-2009 03:05 PM

454 plugs
 
I thank all you guys on the recommendations, it's great to know. I tried the ac delco iridium but they were horrible and the engine flooded and my plugs were burnt and shot up. Ac r43t are working like a charm and wanted to know if the NGK's or the rapid fire #1 were any better. Did not want to have the same issue I had with the iridium ac plugs. It was scary especially being at hell's gate by the east river.

Thanks again.


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