spark plugs AC delco 41-948

[marlon95]

first of all thanks for your help on my previous thread,
i took out my spark plugs and they were AC DELCO 41-908.
i went out to buy new spark plugs, they only had AC DELCO 41-948.
can anyone help me on this, can i use AC DELCO 41-948 and where can i find more info on al those AC DELCO spark plug numbers (41-906, 41-908, 41-948??)
thanks in advance.

[Rob B (shoebox)]

Stock plug for your car should be 41-943 or you can use a Rapidfire 14. 948s are spec'd for 4 cylinder engines.

http://www.acdelco.com/parts/sparkpl...tification.htm

[Injuneer]

Some people have found that the stock AC/Delco plugs lose their platinum tips, leaving a huge gap for the spark to cross. I had two sets with that problem, before I switched to NGK's. You might want to look at something other than the stock plugs.

[marlon95]

thanks for your help.And i already paid for those 41-948 plugs!!..#$@ i will bring them back, using the AC delco identification table to show those dummies at the dealer that 41-948 is not intended for my car. Shoebox thanks again.
If he cannot deliver 41-943 i should have to go check at other dealers for NGK

[Al 96 Ram Air T/A]

Stick with NGK...the AC Delco Platinum stink...same problem for me...pucks fell off.

I've heard good things about iridium plugs...last a long time too...but kind of expensive.


My Vibe GT came with them from the factory. Suppossed to last as long as platinum but not wear out after 50K. So far...so good.

[01Y87]

iridium? platinum? I dont know what the difference is! I got AC-Delco "Iridium" (it said so on the box, IIRC) installed in my V6 and never had a problem.

[Injuneer]

iridium? platinum? I dont know what the difference is! I got AC-Delco "Iridium" (it said so on the box, IIRC) installed in my V6 and never had a problem.

Platinum is "old tech"..... seems that NGK and AC/Delco have replaced platinum with "iridium" in many applications.

[fastTa]

iridium? platinum? I dont know what the difference is! I got AC-Delco "Iridium" (it said so on the box, IIRC) installed in my V6 and never had a problem.

Iridium is believed to be the most corrosion resistant element on Earth....and that's sorta ironical considering most scientists believe that Iridium has come from asteroids. It is also very hard and dense and extremely heat resistant, and is the second most dense element found on Earth. Only Osmium is more dense. These characteristics make the plugs very durable, but they also make them perform better as well.

It is said that Iridium center electrodes can withstand temperatures up to 4,000 deg F. This allows the spark plug manufacturers to make the center electrode much smaller than a typical copper or nickel plug, or even a platinum plug. Most of the Iridium plugs have a center electrode of anywhere between 0.4mm and 0.7mm. I believe Delco platinum's have a center electrode of 1.15 mm. Copper/Nickel plugs can have a center electrode 100%-150% larger in diameter.

Due to large surface area of the center electrode on Copper/Nickel plugs, they can actually "squash" the initial flame kernel and prevent an optimum flame front as a result. This is typically referred to as flame kernel quenching. Using a much finer center electrode, as on the Iridium's, this flame kernel quenching is significantly reduced and therefore allows a more efficient flame front resulting in more power.

Iridium center electrodes also absorb far less heat and require much less voltage in order to correctly "fire the gap". This makes your entire ignition system more efficient and again creates better performance and much less chance of detonation and plug fouling.

[Injuneer]

..... This is typically referred to as flame kernel quenching.....

I thought that's how they cook the chicken at KFC

[fastTa]

I thought that's how they cook the chicken at KFC

...and the so called chicken Mc "nuggets" at Mickey D's!