Can I get a read on this plug?
#1626375
05/29/14 11:21 AM
05/29/14 11:21 AM
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Joined: Jul 2007
Posts: 11,836 Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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I have recently read some conflicting info on reading plugs even conflicting on what I think I know and even some info I was unaware of. Any input would be apreciated.
Thanks in advance, Kevin
Careful, your character's showing!
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Re: Can I get a read on this plug?
[Re: Steve Bryant]
#1626377
05/29/14 12:28 PM
05/29/14 12:28 PM
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Joined: Jul 2007
Posts: 11,836 Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Somewhat but I want to hold that info until some opinions, don't want to taint the pool with anything at this point. I will add it later though, thank you for your input.
Careful, your character's showing!
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Re: Can I get a read on this plug?
[Re: Steve Bryant]
#1626379
05/29/14 12:32 PM
05/29/14 12:32 PM
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Joined: Jul 2007
Posts: 11,836 Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Not really I changed some things and drove 50-60 miles so they are different, the changes had some ill effects and I am considering reversing all of them. That is the only picture I took at the time, I am gonna change them in a bit and I will outline the changes I made to the car at that time. Please check back later as it will be interesting to see your read on the changes.
Careful, your character's showing!
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Re: Can I get a read on this plug?
[Re: mopar346]
#1626381
05/29/14 01:20 PM
05/29/14 01:20 PM
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Joined: Jan 2003
Posts: 4,664 Newfoundland
mopar_man
master
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master
Joined: Jan 2003
Posts: 4,664
Newfoundland
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Quote:
I have recently read some conflicting info on reading plugs even conflicting on what I think I know and even some info I was unaware of. Any input would be apreciated.
Thanks in advance, Kevin
That plug must have very little miles on it and I mean very few . If it got 5-10-15 - thou on them , then you got coolant getting on that plug . Too clean too white .
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Re: Can I get a read on this plug?
[Re: Cab_Burge]
#1626383
05/29/14 01:52 PM
05/29/14 01:52 PM
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Joined: Jul 2007
Posts: 11,836 Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Cab, Autolite AP65s, not really a hot plug is it? Not a real destinct line on the strap. I saw the black dots, not really enough to be detonation in my mind, timing is argueably low infact at this point. One change I made was moving the timing up and ended up with too much total, now plugs are peppered pretty good, no shiny that I saw though.
Careful, your character's showing!
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Re: Can I get a read on this plug?
[Re: mopar346]
#1626386
05/29/14 11:02 PM
05/29/14 11:02 PM
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Joined: Jul 2007
Posts: 11,836 Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Here is a picture of the plugs replaced today, this is the same plugs as above but with a jet change from 64s to 67ys briefly and then 65Hs, there is only about 50-60 miles from the earlier picture, it also had way too much total timing during this time period. I took 9 pictures but this is the only one that I thought had a chance of being able to be seen in a post. It is heavy black around the thread base, definitely rich and even black on the porcelain indications of the high timing. This all started because I was getting a slight surge at highway speeds (2700ish RPMs), other than that it ran extremely well with only an occasion minor hot soak start issue and an occasional low idle. I begin to address it like a lean surge starting with the jet change and then began to go through the 6 pack set up as outlined by Tom Quad and Dayclona, at this point the run quality began to deteriorate, mostly the idle quality but it also led to the high timing setting. It would not idle below about 1200 or so I started to return to my base setting (I built the carb and fired it up about 900 miles ago now) during this I could not get my idle back and since it was around 1200 the mechanical advance was coming in so I had to resort to setting total timing at 34, while doing this I realized that the vacuum advance added nothing to the total timing. I found the canister was leaking freely? In taking it apart I found that the spring in the vacuum advance had the plate in a bind and that was the origin (I think) of too much timing at idle. I also found another issue with the distributor as well, so I am replacing it even though it is new. So here is what I think happened, the surge was the first sign on the vacuum advance going bad and as I was adjusting it was getting worse until complete failure, it was doing this while I was making the adjustments so it was really confusing me. The long and the short of it is I plan to replace the distributor and go back to me base settings and see if he surge is gone and everything else returns to normal, the surge was slight so I could live with it if I cant get it out.
One of the reasons for my concern is I am fixin to run it about 3000 or so miles and I don’t wont it running lean.
So does anyone see a reason to be concerned with the condition of the plugs in the first picture, this was where it ran it’s best for 800 miles with the 64s and my settings. I know it’s a long drive but it’s a car that is what it was built for.
Thanks, Kevin
Careful, your character's showing!
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Re: Can I get a read on this plug?
[Re: Steve Bryant]
#1626389
05/30/14 12:10 AM
05/30/14 12:10 AM
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Joined: Jul 2007
Posts: 11,836 Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Quote:
So I wish you lived near me and I would loan you my A/F gauge and sensor. That $130 device took all the guesswork out of my carb tuning and I was able to get a Eddy 750 to function cleanly and without a lean stumble on a 440.
If you are not in too much of a rush, I would consider doing something like that. Amazon sells them for less than $150 and it is an excellent tool for doing exactly what you are doing. I got a local shop to weld a couple of O2 bungs in my exhaust and it cut my carb tuning time and guesswork down to something very manageable.
I don't have the wizard skills to read spark plugs to the level of knowing where the A/F mixture is at Idle, cruise circuit, low-vacuum cruise and WOT.
I am sure there is a wizard here who can look at the photos and tell you what to do since there are some very very smart people on this board like Mr. Cab. BUT, if you have a few days to get in a gauge, around $150 and a local welding shop to install some bungs I can guarantee you will find a solution pretty quickly.
Thank you, where abouts in Ga are ya, I'm only a few miles from the border. The problem with using those for me would be the welding in the bungs, no way I am drilling into my Accurate exhaust, damn near a grand. This is an AAR and pretty close to correct so mods like that aint gonna happen, it would make it easier though. Here is one of the sites I used to learn a little more about plug reading, i have always read the procelein but I wasn't really reading the true story. If you want to know more just google plug reading basics and all sorts of stuff comes up. This one is very much to the point and simple.
http://www.wallaceracing.com/plug-reading-lm.html
Careful, your character's showing!
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Re: Can I get a read on this plug?
[Re: Cab_Burge]
#1626392
05/30/14 12:39 AM
05/30/14 12:39 AM
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Joined: Jul 2007
Posts: 11,836 Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Thank you, I'll do that when I get the distributor back in and my settings back to where I had them.
Careful, your character's showing!
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