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Author
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Topic: hey Alex,spark plugs for World Product sportsman II
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popeye
Journeyman Posts: 60
From: midwest USA
Registered: Dec 2002
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posted 07-31-2003 11:41 AM
   
We are using autolite # 25 gapped at .040 with 11.00 to 1 comp(dome)ratio,billet MSD advance locked out set at 35 degrees btdc,using Union 76 108 race fuel.Do you have any other plug suggesttions? thanks,popeye ------------------
This is FORD COUNTRY, where on a quiet night, you can hear a chevy rusting
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Dave_C
Gearhead Posts: 740
From: Gadsden, Al
Registered: Aug 99
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posted 07-31-2003 05:42 PM
I'm not Alex, but my old car had those heads. Tried many plugs, but the best was Autolite Racing plugs # AR135. BTW, they come pre-gapped at .026. But, the electrode is cut back to the side. Don't change the gap. Alex carries them. You can also get them on overnite order from Advance Auto Parts, if you have one in the area.
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kid vishus
Gearhead Posts: 4377
From: middle of NC
Registered: Oct 2000
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posted 07-31-2003 05:52 PM
Yep, the AR plugs are the best plug out there right now. That's what is in my racecar, and I even stuck a set in KK's racer.
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popeye
Journeyman Posts: 60
From: midwest USA
Registered: Dec 2002
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posted 07-31-2003 10:34 PM
Thanks for the replies guys.How does the Autolite AR135 compare to the #25 or #24 for heat range? I Was going to try a #24 this weekend.popeye  ------------------
This is FORD COUNTRY, where on a quiet night, you can hear a chevy rusting
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Dave_C
Gearhead Posts: 740
From: Gadsden, Al
Registered: Aug 99
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posted 07-31-2003 11:16 PM
The AR 135 will be a little colder. Take a look at this chart:
http://66.155.51.113/technical/sheets/spark/Autolite.pdfLook at the top right and you will find the 14mm, tapered seat, .460 reach plugs. The 135 is in the same family as your 24/25's. The 23-26's have a powertip vs the std tip on the 131-136 and run a little hotter. On the chart the AR designation is not listed, just the 135 etc. The AR racing plug is the same design, but it has a nickel body with the back cut electrode. Here is a complete listing of the AR plugs:
http://cpgparts.alliedsignal.com/cpg/catalog/autolite/legal/RacingCrossRef.pdf Later,
David Cole
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