Autolite closing

[FastDriver]

Maybe it's dumb, but I just bought $300 worth of autolite plugs and already have a couple sets in the garage. I know I could just move on to NGK, but Autolites have always worked for me. They're my go-to in a basic H/C/I car (3924), and in Black Jack with nitrous (3923). So, I've got 10 or 11 sets now. Hope that'll last me the rest of my life.

 

[91AOD5.0LX]

For whatever it’s worth, I get it, and I have also done that with different things. So no, not dumb in my opinion. Makes sense to set yourself up with a lifetime supply. If you hadn’t you would be wishing you did a year or two from now.

 

[AeroCoupe]

So if you do not mind me asking what did you pay per plug?

 

[revhead347]

Maybe it's dumb, but I just bought $300 worth of autolite plugs and already have a couple sets in the garage. I know I could just move on to NGK, but Autolites have always worked for me. They're my go-to in a basic H/C/I car (3924), and in Black Jack with nitrous (3923). So, I've got 10 or 11 sets now. Hope that'll last me the rest of my life.

Ah . My 3924s are like 10 years old. I didn't get the memo. Maybe I need to hike it down to O'Reilly's and stock up too. What is it, an NGK TR5 that replaces the 3924? It's been so long since I looked it up.

Kurt

 

[AeroCoupe]

Well I just bought 8 sets for about $2.50 a plug shipped. Have four cars running them so should be good.

 

[Blackhawkxx]

Well I just bought 8 sets for about $2.50 a plug shipped. Have four cars running them so should be good.

Where did you find them?

 

[FastDriver]

I paid like $4.50/plug for 3923s shipped, I think. They seem to run fine in Black Jack, but I did foul a set early on before I leaned its part-throttle/Cruise in its current tune.

I bought from rock auto, which was cheaper, but they only had 5 plugs. Then I just bought from Autozone. I guess my shop-fu is weak.

 

[FastDriver]

Ah . My 3924s are like 10 years old. I didn't get the memo. Maybe I need to hike it down to O'Reilly's and stock up too. What is it, an NGK TR5 that replaces the 3924? It's been so long since I looked it up.

Kurt

According to Chat GPT after I asked if the 5671A-7, like in my turbo cars but a step hotter is the right replacement, it gave me an entirely different plug number. I have not personally validated it, but I know the 5671A-7 would be a decent replacement plug if it burns clean on the street. I use a -8 (one step colder) plug in my turbo strokers. The -8 would probably be in the 3922 temp range. Maybe that means a -6 or a "BKR6..." would be good as a 3924 replacement.

"NGK BKR7ES-11, gapped down to about .032–.035": best replacement for your known-good Autolite 3923.

NGK R5671A-7: reasonable if you want a more race-oriented, non-projected plug while keeping heat range 7."

It also says that the TR5 differs in 3 ways:
Its a -5 heat range, which might be on the hot side of a 3924. It has a tapered seat instead of a gasket. And, it has a .708" reach instead of .750". I've heard of this plug before, so it must be something I've seen other guys run, but don't think I ever used it.

 

[FastDriver]

Another interesting tidbit since NGK is going to be my next pick when I have to replace the autolites I've trusted for more than 20 years:

BKR7ES-11 (3923 replacement)
the letters are part of the descriptive code:
B = 14 mm thread
K = 5/8" hex / projected-type family
R = resistor
7 = heat range
E = 19 mm / 3/4" reach
S = standard copper core electrode
-11 = preset gap around .043"

 

[nicholase]

I ordered some too. Kinda reminds me of the TP situation a few years ago

 

[revhead347]

According to Chat GPT after I asked if the 5671A-7, like in my turbo cars but a step hotter is the right replacement, it gave me an entirely different plug number. I have not personally validated it, but I know the 5671A-7 would be a decent replacement plug if it burns clean on the street. I use a -8 (one step colder) plug in my turbo strokers. The -8 would probably be in the 3922 temp range. Maybe that means a -6 or a "BKR6..." would be good as a 3924 replacement.

"NGK BKR7ES-11, gapped down to about .032–.035": best replacement for your known-good Autolite 3923.

NGK R5671A-7: reasonable if you want a more race-oriented, non-projected plug while keeping heat range 7."

It also says that the TR5 differs in 3 ways:
Its a -5 heat range, which might be on the hot side of a 3924. It has a tapered seat instead of a gasket. And, it has a .708" reach instead of .750". I've heard of this plug before, so it must be something I've seen other guys run, but don't think I ever used it.

I love it when someone else does all the work for me. I probably should change the plugs before I take my car in for the tune. I have found chatgpt to give dubious information at times. It's reading all the misinformation people put on forums, and presents it as a fact. When I was a parts manager I knew how cross plugs like a king. It's a skill set I have lost. I have to have my plugs gapped at like .030" for the nitrous.

Kurt

 

[Noobz347]

I have found chatgpt to give dubious information at times.

Yes. You gotta know enough to know when it's taking you down the path of BS.

 

[AeroCoupe]

Where did you find them?

Autolite 3924 Spark Plug Copper Core (Quantity 12)

Includes (12) 3924 Spark PlugsElectrode Tip Material: Resistor, Reach: 3/4 in, Resistor: Suppressor, Seat Type: GasketThread Diameter: 14 mm, Tip Configuration: Power, Wrench Diameter: 5/8 inPower tip extends further into the combustion chamber to aid in self-cleaning, reducing fouling at low...

brandnewtools.com

Appears legit so I guess we will see.

 

[Noobz347]

I just ordered 16x 3923s for my rig from O'Really?...

I didn't want to screw around with, "Maybe they're legit but not certain" scenarios.

If they're no good, they go right back to O'Really?.

Besides, the other site didn't have the 23s.

 

[TOOLOW91]

Just a little tip from all the small tire racing stuff.

NGKs are easier to plug read while tuning. You’ll usually hurt the plug or see something is going on before it gets real bad where as for some reason it will hurt an auto lite and it’s always a little to late.

 

[rednotch]

FR2LS and FR3LS where AC Delco autolites 3923 / 3924's. Not sure who's sourcing them now buy I have a few boxes stil

 

[gkomo]

Are Autolites really that good? NGK, Denso, Bosche, Motorcraft, etc not as good?

 

[Bullitt347]

Just a little tip from all the small tire racing stuff.

NGKs are easier to plug read while tuning. You’ll usually hurt the plug or see something is going on before it gets real bad where as for some reason it will hurt an auto lite and it’s always a little to late.

So true.
I have a bunch of NGK in different heat ranges just because of that feature.
Probably should look to get some more before they go up in price.

 

[revhead347]

Just a little tip from all the small tire racing stuff.

NGKs are easier to plug read while tuning. You’ll usually hurt the plug or see something is going on before it gets real bad where as for some reason it will hurt an auto lite and it’s always a little to late.

I heard that a long time ago. People don't like the Autolites, because the ground strap doesn't melt away when it gets too hot. The NGKs act like a fuse.

Kurt

 

[TOOLOW91]

I heard that a long time ago. People don't like the Autolites, because the ground strap doesn't melt away when it gets too hot. The NGKs act like a fuse.

Kurt

I can confirm this on multiple 1300-1600 plus hp cars