| From | Message |
Joel
Unregistered
4/01/2001
20:52:59
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 Subject: autolite 3924
IP: Logged
Message:
i was trying to buy some autolite 3923's but all i saw was the 3924, can someone give me some knowledge???
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RonW
Gen III
4/01/2001
21:23:25
| RE: autolite 3924
IP: Logged
Message:
The 3923's are one step colder. The 3924's are equivalent in heat range to what came stock on your truck.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
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jay
Unregistered
4/02/2001
00:00:01
| RE: autolite 3924
IP: Logged
Message:
What exactally does a lower heat range mean? what
does it do?
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jay
Unregistered
4/02/2001
00:00:29
| RE: autolite 3924
IP: Logged
Message:
What exactally does a lower heat range mean? what
does it do?
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RonW
Gen III
4/02/2001
00:50:55
| RE: autolite 3924
IP: Logged
Message:
It means that the center ceramic part of the plug dissipates heat from the cylinder faster.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
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95DakotaV8
*GenII*
4/02/2001
07:05:57
| RE: autolite 3924
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Message:
By dissapating heat faster, less chance of pre-igniting the mixture,
bottom line, less pinging.
Kevin Rants
95 CC SLT 4x4, 5.2L, 5spd
Family Man!
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Bernd
GenIII
4/02/2001
10:34:33
| RE: autolite 3924
IP: Logged
Message:
Hey Ron,
C'mon now...you should know this by now. The Autolite 5224's are the "factory" replacements...not the 3924/3923's. The factory plugs use a "Projected Power Tip" and the 392x series is a standard tip.
The older Dak's used the standard tip plugs.
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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RonW
Gen III
4/02/2001
13:21:46
| RE: autolite 3924
IP: Logged
Message:
Thanks Bernd. I do know that. That's why I stated in my reply that the heat range was equal to the OEM plug, not that the plugs were identical. I probably should have gone one step further. Bernd is right. The tip of the OEM plug does extend further into the combustion chamber, however, a lot of people have found that not going in as far is better. That's why people have chosen the 39xx plug for the 3.9, 5.2, 5.9 engines rather than the 52xx series.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
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Bernd
GenIII
4/02/2001
13:57:01
| RE: autolite 3924
IP: Logged
Message:
"Not going in as far is better." Uhhhh....hehehehehe....yeah, ooooook. ;)
(I'm leaving that one alone.) LOL
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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Jamie
Dodge Dakota
JOIN HERE
11/20/2003
14:43:10
| RE: autolite 3924
IP: Logged
Message:
I use the 3924 in a 502CI Blown Big Block and I am getting a lot of ping in my low end, like when I take off from a stop. Can this have something to do with heat range? Should I go to a 3923 or 3925??? Any suggestions would be appreciated.
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99DAK
Dodge Dakota
JOIN HERE
11/21/2003
02:00:32
| RE: autolite 3924
IP: Logged
Message:
"The tip of the OEM plug does extend further into the combustion chamber, however, a lot of people have found that not going in as far is better."
When I got my V6 it had recently installed, properly gapped 3924s in it. After about 1200 miles I switched to factory spec Bosch platinums (extended tip) and picked up almost 2 mpg and got slightly more power (eliminated OD-3rd downshift on hills). So I guess it varies from one motor to the next.
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Wal
Dodge Dakota
JOIN HERE
11/21/2003
09:15:25
| RE: autolite 3924
IP: Logged
Message:
Thanks for all the good info on the plugs. I know I didn't start the thread but I read this board daily and it's good to have an answer on the how/why's of the different plugs.
Good thing we don't have aluminum heads on the truck! I shutter to think about all the guys leaving in the long deep plugs in their DAK's for high miles without changing them. Back them out of an aluminum head and watch your threads go away. OOF.
Wal
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Nick Rey
Dodge Dakota
JOIN HERE
10/11/2006
14:52:00
| RE: autolite 3924
IP: Logged
Message:
Is this plug suitable for a Dodge 225 Slant six?
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trucky
Dodge Dakota
JOIN HERE
10/12/2006
08:28:19
| RE: autolite 3924
IP: Logged
Message:
i got the 3923's recently and only put in 4 cuz i still havnt had time to undo all the crap in the way of the others.... but i gapped it at .05 and its suppoed to be .04...is that bad? would i want a bigger or smaller gap for mpg-performance or is it best to stick with what the manual says?
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timinglight
Dodge Dakota
JOIN HERE
10/12/2006
21:52:42
| RE: autolite 3924
IP: Logged
Message:
They will wear and the gap will get wider. Some people slightly under-gap so it will stay in tune longer. I would regap(.38-39) when you get to the other 4. Might want to try Bosch plat 4`s part #4418.They seem to work well in the 4.7,despite their criticism. You could go at least 50k and not have to move all the very important,well engineered accessories for a while. Plus get this,you don`t have to gap them!!
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david edwards
Dodge Dakota
JOIN HERE
11/16/2007
00:09:41
| RE: autolite 3924
IP: Logged
Message:
i apologize if you recieve this twice,is the autolite3924 suitable for a 2001 hyundai elantra gls,2.0 and also i've called different auto parts stores asking them for the right spark plug they tell me champion rc12pyp is the plug for my car and when i ask a hyundai dealership they say rc10pypb4 which one should i put in?
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david edwards
Dodge Dakota
JOIN HERE
11/16/2007
00:11:04
| RE: autolite 3924
IP: Logged
Message:
i apologize if you recieve this twice,is the autolite3924 suitable for a 2001 hyundai elantra gls,2.0 and also i've called different auto parts stores asking them for the right spark plug they tell me champion rc12pyp is the plug for my car and when i ask a hyundai dealership they say rc10pypb4 which one should i put in?
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dude
Dodge Dakota
JOIN HERE
11/16/2007
01:18:10
| RE: autolite 3924
IP: Logged
Message:
factory plugs are selected to cover a wide range
of operating temperatures, you can fine tune
depending on your particular application but:
plug temperature has no effect on engine temps,
hot/cool plugs simply have different internal specs
to dissapate the heat away from the tip thru the base and cylinder head.
too hot a plug: chance of pre-ingnition / detonation
too cool a plug: carbon build-up and plug fouling
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dvrdown
Dodge Dakota
JOIN HERE
12/01/2007
17:56:48
| RE: autolite 3924
IP: Logged
Message:
looking for advice on which plugs to use on a 2006 4.7 mild mods
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TexasTodd
Dodge Dakota
JOIN HERE
12/04/2007
12:00:29
| RE: autolite 3924
IP: Logged
Message:
While we've brought this old thread out of the grave,
It seems that using a slghtly hotter plug, (in my case the stock vs a colder plug), would have the same effect as advancing the timing slightly.
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.boB
Dodge Dakota
JOIN HERE
12/04/2007
17:46:01
| RE: autolite 3924
IP: Logged
Message:
Not exactly. Advancing the timing can sometimes increase power. As a side effect, it can often cause pre-ignition (pinging). A plug that's too hot will cause pinging. But it won't increase power.
If you really want the best plug for the application, you keep going one step colder until you get plug fouling. Then go back a step. Unfortunatly, as conditions change (like winter sets in) you'll be changing plugs pretty often.
Unless your engine is modified, or you run the truck under extreme conditions (heavy load and high heat), there's no advantage to using a colder plug. If you've programmed the computer for more spark and fuel and you get some pinging, you might reduce that with a colder plug. But you might not. You're better off with a colder thermostat than a colder plug.
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