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Old 04-20-2010, 02:58 PM
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Recommend me some spark plugs please

It's time for some new plugs. I think the ones I had were stock heat range. The use for my truck is nice days, weekends and occasional drag strip blasts. It weighs about 4000 lbs and runs high 14s. Motor specs are below. Thanks for the help!

85 Chevy Silverado C10 short, wide, yellow, 2wd, Lowered.

60-over 350 with Dart Iron Eagle heads (165cc, 1.94/1.50) and Comp Cams XE268 cam, Mallory HEI, Aurora 8mm wires, Edelbrock 1406 carb, Dart II Sportsman dual-plane intake, full-length headers.

TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

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Old 04-20-2010, 04:16 PM
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From the Dart Website for your heads:

The following information should be helpful in the installation of these
heads.
Recommended Gaskets:
Head: 350 Block - Fel-Pro 1003
400 Block - Fel-Pro 1014
Intake: 165cc S/S - Fel-Pro 1204 or OEM
180cc - Fel-Pro 1204
200cc - Fel-Pro 1205
215cc - Fel-Pro 1206
230cc - Fel-Pro 1206
Exhaust: All except - Fel-Pro 1404 or 1405
230cc - Fel-Pro 1405
Recommended Spark Plug:
Tapered Seat, .460” Reach 5/8” Hex
Autolite # 133 Std tip, race
Autolite # 13 Projected tip
Note: Always consult the manufacturer’s catalog
for correct heat range.
Torque Specifications: w/oil
Head Bolts & Studs 70 ft lb
Rocker Arm Studs 45 ft lb
Manifold bolts 35 ft lb
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Old 04-20-2010, 05:01 PM
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Ah yes of course! I tried to recall where I even got the original plug recommendation and it was from that same page. A print-out of it came with my heads. Thanks for the reminder I'll have to go get me some. Seems they recommend Autolite. I tried buying some of those and the speed shop (Mopac, they have a store in Calgary) sold me Accell plugs instead. I remember there being some confusion about the Autolite plug numbers listed by Dart.

Are any plugs better than others? I saw a thread recently where somebody was saying Autolites weren't good and neither were champions, but Delco's and NGK's were good. Opinions????
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Old 04-20-2010, 06:39 PM
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I'm a fan of Autolite or Ac Delco. Many opinions can be found on this sight regarding spark plugs.

Beagle
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Old 04-21-2010, 02:05 PM
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Thanks guys. I see that the AR-series are race plugs with the cut-back electrode. Why is this beneficial? I forsee having a hard time finding them since they are 'race' parts. Is there somewhere I can find an equivalent to the AR133 (cold) or AR134 (medium) Autoline plugs? I don't really want to use a cold plug since my compression isn't all that high anyway. I think the Accell's I have now are AR134 equivalents.
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Old 04-21-2010, 03:13 PM
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Answered my own question Handy chart:
http://www.jegs.com/PDFs/111-UGroove.pdf
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Old 04-21-2010, 10:56 PM
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IMO I would stay away fro, the racing plugs unless you are going to be racing the car. They tend be a colder plug and will foul if you are doing low speed cruising.
JMO but I would try an Autolite 26 for starters. Summitt has them for 1.50 each.

Beagle
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Old 04-22-2010, 12:14 PM
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Thanks for that. I looked it up on the Autolite site and it looks like the 26 is the universal GM V8, small or big block, spark plug for anything from early 70's to late 80's. Inline 6's too.
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Old 04-23-2010, 12:18 PM
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Is the Autolite 26 considered a 'hot' plug or more medium?
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Old 04-23-2010, 01:36 PM
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Quote:
Originally Posted by SUX 2BU
Is the Autolite 26 considered a 'hot' plug or more medium?
With Autolite the higher the last number the hotter the plug. Based on that this plug is pretty much right in the middle.
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