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7/30/11 5:47pm - Original Message: 'spark plugs'
legsdiamond
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St. Louis, MO - USA

Vette(s):
1976 Corvette

Joined: 2/5/2010
Posts: 43
Hi All,
 
Wanting to change spark plugs. Any suggestion? I went to Auto Zone and they recommended an Iridium plug. What do you think?
 
Thanks,
 
Darrell
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7/30/11 8:38pm - Reply: 'spark plugs'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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If you're running a basically stock engine, there's no need to go for anything other than a "regular" sparkle plug, imho. The AC/Delco plugs work just fine.

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Joel Adams
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7/30/11 11:08pm - Reply: 'spark plugs'
legsdiamond
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St. Louis, MO - USA

Vette(s):
1976 Corvette

Joined: 2/5/2010
Posts: 43

Hi Joel,

The engine was rebuilt before I owned the car. Don't know much about. Only that it's a 350, has headers and an aluminum intake.
 
thanks


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7/30/11 11:14pm - Reply: 'spark plugs'
Gunslinger
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Frederick, MD - USA

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1969 convertible L71 427/435 4-speed black interior

Joined: 9/8/2003
Posts: 3398
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Joel is absolutely correct.  In a stock system installing exotic spark plugs only serves to enhance the spark plug maker's (and ad agency's) bank account at the expense of your wallet...but you do get a nice little decal in the box so you can place it in a conspicuous spot on your car so everyone knows what spark plugs you use.  It's kinda reverse endorsement arrangement...instead of them paying you to endorse their product, you're paying them to endorse their product!  Just joking...stock plugs are all you need.

The most important thing in selecting a spark plus is proper heat range.  Unless you're trying to address a specific issue, the manufacturer's recommendation is all you need.  Pick your brand.  I have AC's in my '69 but I know many swear by NGK.  Your money...your choice.


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7/30/11 11:15pm - Reply: 'spark plugs'
KDADDY79
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Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484
Approve A second plug for the stock AC/Delco's here.
I think the technology of a carburated 350 calls for the stock plugs.
I wouldn't want to find out what the wrong plugs could do to my motor.
Tell us what you decide to go with.
Kevin


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7/31/11 12:04am - Reply: 'spark plugs'
legsdiamond
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St. Louis, MO - USA

Vette(s):
1976 Corvette

Joined: 2/5/2010
Posts: 43
Thanks guys...I think I will go with the AC Delcos!

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7/31/11 8:13pm - Reply: 'spark plugs'
Ron 78 Lifetime Member
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BINGHAMTON, NY - USA

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Joined: 7/19/2003
Posts: 3805
A.C.Delco's in all my vehicles

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8/1/11 8:15am - Reply: 'spark plugs'
manchestershark Lifetime Member
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Equinunk, PA - USA

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1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 1895
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8/1/11 10:34pm - Reply: 'spark plugs'
anips
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sonoma, CA - USA

Vette(s):
72 LT-1 AC coupe,69 l-36 coupe

Joined: 8/9/2002
Posts: 783
if you have more time than money, you can index your stock plugs and file the ground back so that the end stops over the center of the electrode, there are different thories but I index the plug so the open end of the electrode- ground face the top of the piston and filing back the ground helps unshroud the spark, or if you don't have the time for a little more money you can try GM's Rapid Fire plugs they work and they are way cheaper than Iridium and Split Fire is junk. anips2011-08-01 19:39:44

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8/2/11 5:59pm - Reply: 'spark plugs'
legsdiamond
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St. Louis, MO - USA

Vette(s):
1976 Corvette

Joined: 2/5/2010
Posts: 43
Hey Anips,
 
Where would be the best place to purchase GM's Rapid Fire plugs? They will work in a 350? Right?
 
Thanks,
 
Darrell


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8/2/11 7:07pm - Reply: 'spark plugs'
anips
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sonoma, CA - USA

Vette(s):
72 LT-1 AC coupe,69 l-36 coupe

Joined: 8/9/2002
Posts: 783

yea, they will work in a small block, they are available at the chevy dealer and most auto parts store, just make sure you get the right heat range and type for your application, they will most likely be cheaper at auto parts, GM won"t give ya a break.



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8/2/11 10:31pm - Reply: 'spark plugs'
Jaws79 Lifetime Member
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Sykesville, MD - USA

Vette(s):
1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

Joined: 4/27/2008
Posts: 4211
The General wouldn't do you wrong, would he?
 
Barry
 
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8/3/11 9:08pm - Reply: 'spark plugs'
daveo76
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 829
I used Delco R45TS when my motor was stock.  Now that I'm doing some significant upgrades I'm wondering what plug to use.  My engine builder suggested Autolite 26, but I like the Delcos.  Any thoughts on what to use with the Vortec heads, 9.4:1 CR, mild cam?  

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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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