Saturday Night Racer - World Heads Sparkplug?

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World Heads Sparkplug? (Read 4056 times)

Missle Motorsports

LMR God

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Sportsman &
Modified #57m

Posts: 1339
Racecar Ranch, Calif.Foothills

World Heads Sparkplug?
08/18/09 at 4:46pm

I have a 358 Chevy,using a Holley750cfm, on Gas. Running WorldProducts Heads, takes a 5/8 SparkPlug. Have been using Autolite#AR134 plugs, gapped @ .045 ,with MSD distributer. About every 4th race, the plugs seem to loose fire at Lower RPMs. They aren't Fouling Out,just run like crap. New set of plugs,& all is well.
The #AR134 are a short reach plug,am I gapping them to far, our is there a different plug someone can recomend? Thanks

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Sparky56 LMR God Offline Z-Boyz Racing Posts: 982	Re: World Heads Sparkplug? Reply #1 - 08/18/09 at 6:01pm NGK Part#R5673-9, Stock#3442, .040" gap Order online at sparkplug.com, they're the cheapest. Mark, this is the plug I've ran for years with no problem
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Missle Motorsports LMR God Offline Sportsman & Modified #57m Posts: 1339 Racecar Ranch, Calif.Foothills	Re: World Heads Sparkplug? Reply #2 - 08/18/09 at 11:33pm Thanks for the INFO, will have a Set here Thursday A.M., & will try em out this weekend.
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RACEGLASS LMR Member Offline IN ORDER TO WIN, YOU HAVE TO FINISH Posts: 160 CA.	Re: World Heads Sparkplug? Reply #3 - 08/19/09 at 8:41am Mark...come talk to me this Saturday and bring me one of your old AR134's. Matt
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Missle Motorsports LMR God Offline Sportsman & Modified #57m Posts: 1339 Racecar Ranch, Calif.Foothills	Re: World Heads Sparkplug? Reply #4 - 08/19/09 at 3:50pm OK Matt, see ya Saturday
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Darrell Hughes II LMR Member Offline Dirt Late Models Rule! Posts: 107	Re: World Heads Sparkplug? Reply #5 - 08/19/09 at 10:33pm we have the same motor and heads AR12 gap em at 45-55 or maybe there is another problem
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sj_valley_dave LMR God Offline Love the smell of nitro in the air Posts: 1700	Re: World Heads Sparkplug? Reply #6 - 08/21/09 at 10:25am In our Dart heads we always ran AR133 gapped at .040 and never had a problem...In our rolled head 360 we tried the NGK's and the gaps got closed.
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Missle Motorsports LMR God Offline Sportsman & Modified #57m Posts: 1339 Racecar Ranch, Calif.Foothills	Re: World Heads Sparkplug? Reply #7 - 08/21/09 at 2:14pm My NGK Part#R5673-9, just showed up this morning, so I'll run em tomarrow night & see how they do. Thanks for all the Info.......
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