which spark plug is best??
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Senior User
Joined: Aug 2006
Posts: 201
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From: San Mateo
which spark plug is best??
My truck seems to be missing a little when it is idling, so I am just gonna replace the spark plugs to try solve this as it has been around 3 yrs since I had them done last.
I have been looking at the various plugs available but there is so many out there, ranging in price from about $2.99 to $29.99.
Does anyone have any suggestions about what is the best set to get for the price, and why is there such a difference in price of some plugs.
Thanks.
I have been looking at the various plugs available but there is so many out there, ranging in price from about $2.99 to $29.99.
Does anyone have any suggestions about what is the best set to get for the price, and why is there such a difference in price of some plugs.
Thanks.
Thread Starter
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Senior User
Joined: Aug 2006
Posts: 201
Likes: 0
From: San Mateo
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Posting Guru
Joined: Nov 2008
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From: Pennsylvania Wilds
Autolite 25's in my 302, two bucks a piece, give or take. Cheap copper plugs are as good as it gets for these V8's.
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Elder User
Joined: Feb 2007
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From: Chicagoland
I was mostly happy with the Beldens I got from NAPA for my last tuneup. The only thing extra I would have wished for was to have the wires numbered. That said they were a very good quality part for a daily driver at a reasonable price.
Junior User
Joined: Sep 2008
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I've used NGK's in every vehicle for the last 20 years without trouble. Check with rockauto.com they have plugs as cheap as .70c sometimes.
I have a set of SMP Premium plug leads on my f150 and I use bosch on all my cars.
I have a set of SMP Premium plug leads on my f150 and I use bosch on all my cars.
Der Postmeister
Joined: Sep 2006
Posts: 6,859
Likes: 560
From: Long Beach, Calimexiforia
Motorcraft coppers & MDS 8.5 Supercoductor wires. Best wire specs & really last! About $70. but worth it. Especially if your running a 48 or 60K coil!
Double Plat plugs require more resistance to be overcome to initiate spark & make/leave too much heat in the combustion chambers. They don't like their gap stretched & surely don't accommodate side gapping. And I like to look in on my plugs more than once every 50-100K anyway. Also Coppers allow more base timing advance. I run a sidegap Motorcraft Copper at .056 gap (.044 is stock), 16 BTDC base timing w/ 87 octane gas. I can't do that w/ double plats w/o ping! Supercoductor wires, brass C & R, 60K (.45 ohm) HV coil. 87' 302 w/87k. 23mpg@65mph. Otherwise stock except K&N drop in filter & all fluids are Synthetic.
Double Plat plugs require more resistance to be overcome to initiate spark & make/leave too much heat in the combustion chambers. They don't like their gap stretched & surely don't accommodate side gapping. And I like to look in on my plugs more than once every 50-100K anyway. Also Coppers allow more base timing advance. I run a sidegap Motorcraft Copper at .056 gap (.044 is stock), 16 BTDC base timing w/ 87 octane gas. I can't do that w/ double plats w/o ping! Supercoductor wires, brass C & R, 60K (.45 ohm) HV coil. 87' 302 w/87k. 23mpg@65mph. Otherwise stock except K&N drop in filter & all fluids are Synthetic.
Posting Guru
Joined: Feb 2002
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From: Atlanta, Georgia, USA
Another vote for Autolites. NGK coppers are nice too, but you can get Autolites anywhere.
For wires, I like the Bosch wires that Autozone sells.
Make sure your cap and rotor are the brass-insert kind. The regular zinc-contact cap and rotor are much cheaper but will corrode like no other!
For wires, I like the Bosch wires that Autozone sells.
Make sure your cap and rotor are the brass-insert kind. The regular zinc-contact cap and rotor are much cheaper but will corrode like no other!