Plugs for an HEI setup? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Project1970 · 04-22-2002, 08:18 PM

I figure if I'm going to pull the plugs on my engine, I'll go ahead and replace them, they're cheap enough. It's just a more-or-less stock 1970 350, original in the truck...I believe the standard plugs with .035 gap are ACDelco R43's? Do they make that plug with a .050 gap instead? (because I'm just lazy like that and if the cost is no different, why not... =)

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Project 1970 - soon to be seen at http://milhouse.treylis.org:81/

704x4 · 04-22-2002, 08:39 PM

plugs aren't gapped from the factory

69 longhorn · 04-22-2002, 08:44 PM

If you are running the washer seat plugs,I think it was a 45 that I used(its been a while). At any rate, use the plug that the truck calls for,& open the gap to .045 & you should be ok........69

Longhorn Man · 04-22-2002, 09:22 PM

I wouldn't go to .050...that is a good way to burn up plug wires and coils.

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'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

Chumley · 04-22-2002, 10:08 PM

The AC Delco plugs with the "X" after the number refers to extra wide gap. FYI, "T" designates tapered, and "S" extended tip. Hope this helps you, Chumley

O'l Buck · 04-22-2002, 10:14 PM

I'm using ac r45t plugs with .045 gap on mine.

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Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

Angel girl: 67 Cutlass convertible
330, 3spd stick

Greener: 90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

no name yet: 72 442 under serious construction

04-22-2002, 08:18 PM	#1
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Plugs for an HEI setup? I figure if I'm going to pull the plugs on my engine, I'll go ahead and replace them, they're cheap enough. It's just a more-or-less stock 1970 350, original in the truck...I believe the standard plugs with .035 gap are ACDelco R43's? Do they make that plug with a .050 gap instead? (because I'm just lazy like that and if the cost is no different, why not... =) ------------------ Project 1970 - soon to be seen at http://milhouse.treylis.org:81/ __________________ Project1970 - LS1 Swap Complete!

04-22-2002, 08:39 PM	#2
704x4 Registered User Join Date: Feb 2002 Location: Greene, Iowa Posts: 150	plugs aren't gapped from the factory __________________ 70 3/4 ton 4x4 FOR SALE Greene, IA

04-22-2002, 08:44 PM	#3
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	If you are running the washer seat plugs,I think it was a 45 that I used(its been a while). At any rate, use the plug that the truck calls for,& open the gap to .045 & you should be ok........69 __________________ http://community.webshots.com/user/hotrodhorn

04-22-2002, 10:14 PM	#6
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	I'm using ac r45t plugs with .045 gap on mine. ------------------ Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s Angel girl: 67 Cutlass convertible 330, 3spd stick Greener: 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE no name yet: 72 442 under serious construction __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

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04-22-2002, 09:22 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I wouldn't go to .050...that is a good way to burn up plug wires and coils. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

04-22-2002, 10:08 PM	#5
Chumley Registered User Join Date: Apr 2002 Posts: 1	The AC Delco plugs with the "X" after the number refers to extra wide gap. FYI, "T" designates tapered, and "S" extended tip. Hope this helps you, Chumley



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