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Author Topic:   spark plugs
Dirt Forum Champ
Total posts: 1876
posted July 20, 2005 11:56 PM  
What brand of spark plugs, and model series are you guys running? whats the best brand of plug for high rpm use, and how long will one last?

Dirt Freak

Total posts: 265
posted July 21, 2005 09:02 AM  
did you try a search? Do a search on spark plugs and you'll have more information than you can digest in one sitting.

Dirt Freak

Total posts: 205
posted July 21, 2005 11:57 AM  
personal experience says in dramatic fashion NGK...
motocross, micro sprints, sprint cars, and all else in between.. always use and have the best luck w/ ngk.

Dirt Freak

Total posts: 334
posted July 21, 2005 01:32 PM  
R5673-10 vpower racing

stock number: 4050

This is on ALKY. 12races on new set and they still look great.

Dirt Full Roller

Total posts: 70
posted July 21, 2005 02:09 PM  
I've used Autolites, Champions, and NGK's. I'd say they are all very good as long as you get the right ones- Getting the right application (heat/type) is a far more important question than brand. I've had good luck with all the brands.

sc1 racing
Dirt Freak

Total posts: 419
posted July 21, 2005 02:24 PM  
for the last 2 years ive had good luck running the accel header plugs..ran the plugs almost all year and took header off 1 night and broke 2 so i replaced all of them..

Dirt Freak

Total posts: 238
posted July 21, 2005 02:47 PM  
Autolites are still made in America. Not sure, but I believe Champions are meade in Mexico(?) Pretty sure NGK are made in Japan(?) Someone correct me if I'm incorrect on those.

I've had ecellent results with Autolites myself.

Mr. Badboy
Dirt Full Roller

Total posts: 29
posted July 21, 2005 05:36 PM  
I have run Champion, Autolite, and now NGK. They have all done well, and I have no complaints about them. I sell spark plugs in my parts business, and rarely have comeback problems on these brands. When I use a spark plug, I want to make sure the company offers the spark plugs in 5 heat ranges, and select my beginning heat range in the middle of what they offer. I like being able to have this flexability. As far as how long they last, I see them lasting an entire season of Saturday night racing, where the season is 6 to 7 months in duration.

[This message has been edited by Mr. Badboy (edited July 21, 2005).]

Dirt Forum Champ
Total posts: 505
posted July 22, 2005 10:22 AM  
We run autolite 3933 in a 11x headed 347 turning ~8800-9200 and have seen no problems. I usually run them about 6-10 nights.

Dirt Forum Champ
Total posts: 635
posted July 22, 2005 09:37 PM  
I ran Autolite ARs for 3 years until they raised the price to $4/plug. I ran Accel's last year and went to NGKs this year ($1.50/plug from my local parts guy). The NGK's seem to be holding up well. I think the PN I'm using is R5670-9 (gasketed SBC). I can almost buy 3 sets for the price of 1 set of Autolites. I open the gap from .030" to about .045" since the plugs were actually designed to run with a points ignition. With the 16 volt battery, the HEI will fire about anything.

Dirt Freak

Total posts: 205
posted July 23, 2005 10:03 AM  
NGK's weren't designed for a points ignition. They are standard eq. on all japanese motorcycles and not one uses points. the ignitions on a motorcycle are worlds ahead of any auto ignition. But I do believe your gap is a bit excessive. but if it works for ya great..

Dirt Maniac

Total posts: 182
posted July 24, 2005 12:59 PM  
We are buying Autolite AR 134 for $2 a plug at O'Reillys. Never have had a problem.

nine finger
Dirt Forum Racer

Total posts: 76
posted July 26, 2005 05:01 PM  
ar-133 little over 2 bucks

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