Previous Thread
Next Thread
Print Thread
Critique This Spark Plug #2971516
10/06/21 08:56 PM
10/06/21 08:56 PM
Joined: Oct 2006
Posts: 1,262
New York, USA
Chargerfan68 Offline OP
pro stock
Chargerfan68  Offline OP
pro stock

Joined: Oct 2006
Posts: 1,262
New York, USA
This plug came directly from a low deck 498” engine with dyno time only. Had 7 pulls on it and would like your expertise on anything you can surmise. 13:1 comp., sunoco Blue fuel 112 octane, pretty even egt across using a Wilson moded Intake. Pulls to 7900. Thx

9F6B5A92-7F11-4C75-850D-FCD3254ABC86.jpeg

1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
Re: Critique This Spark Plug [Re: Chargerfan68] #2971644
10/07/21 10:25 AM
10/07/21 10:25 AM
Joined: Apr 2003
Posts: 3,496
Tulsa, Oklahoma
340Cuda Offline
master
340Cuda  Offline
master

Joined: Apr 2003
Posts: 3,496
Tulsa, Oklahoma
I think Steve Morris would say it is a little rich:

https://www.youtube.com/watch?v=MecCoercp-s

Re: Critique This Spark Plug [Re: Chargerfan68] #2971758
10/07/21 04:24 PM
10/07/21 04:24 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
What does the ground strap look like?
Does that fuel normally look yellow on the porclyn?


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Critique This Spark Plug [Re: Cab_Burge] #2971798
10/07/21 06:11 PM
10/07/21 06:11 PM
Joined: Oct 2006
Posts: 1,262
New York, USA
Chargerfan68 Offline OP
pro stock
Chargerfan68  Offline OP
pro stock

Joined: Oct 2006
Posts: 1,262
New York, USA
340….thanks for that link. Very informative. He is a Force for sure!

Originally Posted by Cab_Burge
What does the ground strap look like?
Does that fuel normally look yellow on the porclyn?


Cab….not sure on that fuel looking yellow, but all 8 plugs looked the same.
Here is the strap before dismantling:

FC3D4905-D017-482C-93F1-173990E8E527.jpeg

1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
Re: Critique This Spark Plug [Re: Chargerfan68] #2971948
10/08/21 08:59 AM
10/08/21 08:59 AM
Joined: Oct 2006
Posts: 596
Mass.
8
80fbody Offline
mopar
80fbody  Offline
mopar
8

Joined: Oct 2006
Posts: 596
Mass.
Learn something new all the time. Never knew you could separate the plug like that. Do you just twist them apart with some pliers?

Re: Critique This Spark Plug [Re: 80fbody] #2971972
10/08/21 10:05 AM
10/08/21 10:05 AM
Joined: Apr 2003
Posts: 3,496
Tulsa, Oklahoma
340Cuda Offline
master
340Cuda  Offline
master

Joined: Apr 2003
Posts: 3,496
Tulsa, Oklahoma
Originally Posted by 80fbody
Learn something new all the time. Never knew you could separate the plug like that. Do you just twist them apart with some pliers?
You either get a tool or cut them apart on a lath. May be other ways, don't know.

https://nitrousoutlet.com/i-30560870-spark-plug-cutting-tool.html

Re: Critique This Spark Plug [Re: Chargerfan68] #2972016
10/08/21 11:53 AM
10/08/21 11:53 AM
Joined: Nov 2015
Posts: 870
Missouri
J
jwb123 Offline
super stock
jwb123  Offline
super stock
J

Joined: Nov 2015
Posts: 870
Missouri
It may be a little rich if you are digging for maximum power, but I would say it is just right if it came out of one of my engines, I like a little rich just to be safe, plus you don't need to be changing jets if it happens to be a cool day at the track.

Re: Critique This Spark Plug [Re: Chargerfan68] #2972045
10/08/21 01:22 PM
10/08/21 01:22 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
That looks a little rich to me shruggy
How much timing and what heat range is that plug?


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Critique This Spark Plug [Re: Cab_Burge] #2972067
10/08/21 02:11 PM
10/08/21 02:11 PM
Joined: Oct 2006
Posts: 1,262
New York, USA
Chargerfan68 Offline OP
pro stock
Chargerfan68  Offline OP
pro stock

Joined: Oct 2006
Posts: 1,262
New York, USA
Originally Posted by Cab_Burge
That looks a little rich to me shruggy
How much timing and what heat range is that plug?


That’s what i was thinking, but wanted more experienced opinions. Thx. I do like the idea of it being just on the rich/safe side.

Timing at 35 with a -1 Indy head chamber. Ngk R5672A-8 plug on recommendation.


1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
Re: Critique This Spark Plug [Re: 340Cuda] #2972068
10/08/21 02:13 PM
10/08/21 02:13 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
master
dvw  Offline
master

Joined: Mar 2006
Posts: 9,791
MI, usa
Originally Posted by 340Cuda
Originally Posted by 80fbody
Learn something new all the time. Never knew you could separate the plug like that. Do you just twist them apart with some pliers?
You either get a tool or cut them apart on a lath. May be other ways, don't know.

https://nitrousoutlet.com/i-30560870-spark-plug-cutting-tool.html



5/8" hole saw without the drill bit cuts them easily.
Doug

Re: Critique This Spark Plug [Re: Chargerfan68] #2972136
10/08/21 05:49 PM
10/08/21 05:49 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
I would try a #7 plug next up twocents


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Critique This Spark Plug [Re: dvw] #2972370
10/09/21 11:46 AM
10/09/21 11:46 AM
Joined: Sep 2003
Posts: 19,239
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,239
north of coder
Originally Posted by dvw
Originally Posted by 340Cuda
Originally Posted by 80fbody
Learn something new all the time. Never knew you could separate the plug like that. Do you just twist them apart with some pliers?
You either get a tool or cut them apart on a lath. May be other ways, don't know.

https://nitrousoutlet.com/i-30560870-spark-plug-cutting-tool.html



5/8" hole saw without the drill bit cuts them easily.
Doug



iagree
available at most hardware stores, and no more than about $15, even if you have to buy the mandrel.
beer







Powered by UBB.threads™ PHP Forum Software 7.7.1