Favorite Spark Plugs?
Racer
Joined: Jan 2011
Posts: 266
Likes: 0
From: York Pa.
I would go with the ol AC delco plug..if you still got a points distibutor go with the Acell points..they make a heavy set good for high rev..expensive but work great..I used the acell coil also..I noticed a change only after I changed the coil..the old one barely put out 15kv..new one is at around 35kv..big jump..I guess I am covering the whole tune up thing..oh and wires..only get a high quality set as they are a good bit of work to put in as they are under the valve cover style..
Melting Slicks
Joined: Mar 2007
Posts: 2,100
Likes: 12
From: Frederick Maryland
It's hard to beat AC, but for all intents and purposes as long as you buy the appropriate heat range for your application, it really doesn't much matter what brand. You don't need to buy the expensive, exotic and highly hyped brands...you're wasting your money. Unless your engine is built up or you have a specific problem you're addressing, a spark plug equivalent to original equipment is all you need.
I remember a friend who was both a street and drag strip racer told me he preferred Champions for a Chevy small block and AC for a big block.
We all have our favorites, so buy what you like.
I remember a friend who was both a street and drag strip racer told me he preferred Champions for a Chevy small block and AC for a big block.
We all have our favorites, so buy what you like.
Melting Slicks
Joined: Feb 2006
Posts: 3,428
Likes: 5
From: Japan
Couldn't resist this one...I once did a mileage comparison as to which plug took the longest to oil foul when my leaking-intake Vette was using obscene amounts of oil. Between Champion, Autolite, and AC the AC's lasted the longest. Does that mean AC's are the best plug? I dunno. My old engine builder/ salt flats racer friend once told me that he preferred Champion because their white cadmium finish made them easier to read, but I've always heard others say that Champion's quality control was poor. I currently have AC's in my Pertronix-equipped 350 and they've been in there for 9 years and over 30,000 miles with no problems....hope this added to the cornfusion!
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Racer
Joined: Jan 2011
Posts: 266
Likes: 0
From: York Pa.
I bumped my gap up to. 40 since the coil puts out more zap..I thought HEI started in 76? Oh well..its hard to remeber what happened when..did you get the gear drive set up I have seen for the tach in the new HEI setup?
Le Mans Master
Joined: Apr 2001
Posts: 5,941
Likes: 281
From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
I run mainly NGK in everything I own. If I cannot get a NGK plug I use an AC Delco. I stick with copper unless it is my daily driver, which I use platnium since I do not like to change them much.
Race Director
Joined: Feb 2006
Posts: 12,239
Likes: 19
From: Chino CA
Didn't get the tach drive....going to soon though...
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
You can buy bosche P+4 for the older peanut plug heads. The real value of multi tipped plugs is that you don't have to index them to unshroud the spark for best flame travel.
The super tips made out of platinum or iridium don't erode like junky common plugs
They also consistantly put out a small amount more HP on the dyno runs.
If you are running points and crap wires you might as well run crappy old 50 year old design plugs also!
The super tips made out of platinum or iridium don't erode like junky common plugs
They also consistantly put out a small amount more HP on the dyno runs.
If you are running points and crap wires you might as well run crappy old 50 year old design plugs also!
Last edited by gkull; Feb 1, 2011 at 05:17 PM.
Racer
Joined: Jan 2011
Posts: 266
Likes: 0
From: York Pa.
You can buy bosche P+4 for the older peanut plug heads. The real value of multi tipped plugs is that you don't have to index them to unshroud the spark for best flame travel.
The super tips made out of platinum or iridium don't erode like junky common plugs
They also consistantly put out a small amout of HP on the dyno runs.
If you are running points and crap wires you might as well run crappy old 50 year old design plugs also!
The super tips made out of platinum or iridium don't erode like junky common plugs
They also consistantly put out a small amout of HP on the dyno runs.
If you are running points and crap wires you might as well run crappy old 50 year old design plugs also!
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
I don't have any experience with the multi-ground-electrode spark plugs, but when I want max performance, I use a plug with a single ground electrode, and even grind it back a bit to give the flame kernal every chance to expand and burn all the fuel.
I fail to see the logic of erecting a multi-pronged fence around the expanding flame kernal to improve flame propagation.
I fail to see the logic of erecting a multi-pronged fence around the expanding flame kernal to improve flame propagation.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I don't have any experience with the multi-ground-electrode spark plugs, but when I want max performance, I use a plug with a single ground electrode, and even grind it back a bit to give the flame kernal every chance to expand and burn all the fuel.
I fail to see the logic of erecting a multi-pronged fence around the expanding flame kernal to improve flame propagation.
I fail to see the logic of erecting a multi-pronged fence around the expanding flame kernal to improve flame propagation.
A spark can jump from a small pointed object easiest. The bosche P+4 has a tiny center and tiny side electrodes. The smaller the point the more erosion resistant it has to be.