Reading plugs info needed **now w/ pics**
10-20-2012, 06:05 PM
#1
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Reading plugs info needed **now w/ pics** i got my nitrous kit hooked up and working. got it around 11.8 afr now i want to start reading the plugs to really dial it in.
here is one of the articles i found with some good information.
http://www.dragstuff.com/techarticle...ead-plugs.html
what i'm confused about is the fuel ring.
it seems like some pictures ive seen people cut the plug, then talk about the fuel line as if its on the porcelain.
but in this article its talking about the line being an "xxx amount of turn" on the metal part the ground strap is welded to. and if thats the case what does 3/4 turn look like. is it on the face of the metal? or is it how far it goes up the threads?
am i correct in saying that cutting the threads is to look for signs of detonation/peppering on the porcelain.
here is one of the articles i found with some good information.
http://www.dragstuff.com/techarticle...ead-plugs.html
what i'm confused about is the fuel ring.
it seems like some pictures ive seen people cut the plug, then talk about the fuel line as if its on the porcelain.
but in this article its talking about the line being an "xxx amount of turn" on the metal part the ground strap is welded to. and if thats the case what does 3/4 turn look like. is it on the face of the metal? or is it how far it goes up the threads?
am i correct in saying that cutting the threads is to look for signs of detonation/peppering on the porcelain.
Last edited by boostinsidewayz; 10-22-2012 at 11:17 PM.
10-20-2012, 08:27 PM
#2
I didn't read the article, but the fuel ring will be on the porcelain. In an ideal tune up it should be at the bottom of the porcelain. If it is coming up the steel plug body you are too lean.
You read timing by the ground strap, and black pepper on the porcelain is a sign of detonation. A heat mark in the bend of the ground strap is pretty safe. Closer to the plug body and you are closer to having the maximum allowable amount, and further away from the plug body mean you can put some advance back in it.
You read timing by the ground strap, and black pepper on the porcelain is a sign of detonation. A heat mark in the bend of the ground strap is pretty safe. Closer to the plug body and you are closer to having the maximum allowable amount, and further away from the plug body mean you can put some advance back in it.
10-20-2012, 08:51 PM
#4
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new to the nitrous, have a quick question, i'm using red msd plug wires on my 5.7 and notice that after i chang the plugs twice the wire start braking up they have high resistance, and make the car miss , want to find a better plug wire or one with a lifetime warrenty msd are just 90 day . also liked the plug reading chart like to find more sites like that , i peppered my plugs the other day and it scared the stuffing out of me . any help with be appreciated, thanks
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10-22-2012, 07:13 AM
#9
I had never heard of reading the "barrel" of the plug until Wayne schooled me on it in one of my threads.
And as Shiz said, a plug, is a plug, is a plug. Boost, N/A or Nitrous the reading/appearance you're looking for will be the one constant in all of this.
The only real variable that will make the appearance of what you're looking for in a plug reading is the type of fuel you are running. In other words, gas will have it's own look versus methanol/alcohol. E85/E99 is similar to methanol/alcohol in terms of what you're looking for appearance wise from the plug reading you're getting.
10-22-2012, 11:16 PM
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went out tonight and took a trip to mexico. stopped, changed out 1 plug. drove 40 out of the parking lot. got it into 2nd and went up to about 125.
here is my plug. my timing strap looks good i think.
fuel line, i dont see anything.
jets were 45n/33f
afr started around 11.8-11.9 and the end of 3rd and 4th i was down to 11.2-11.3
please let me know what you guys think. i want to go to the track tuesday night
here is my plug. my timing strap looks good i think.
fuel line, i dont see anything.
jets were 45n/33f
afr started around 11.8-11.9 and the end of 3rd and 4th i was down to 11.2-11.3
please let me know what you guys think. i want to go to the track tuesday night
10-23-2012, 01:14 PM
#11
What is your total timing while spraying?
Looks a little hot to me, and I think the reason you're not seeing a fuel ring is from not putting the car under enough load i.e. from a dead stop.
Which cylinder did you put that plug in? You really need to do more than one plug, at the minimum you need to check all 4 corners of the motor and even then you should do all 8.
Looks a little hot to me, and I think the reason you're not seeing a fuel ring is from not putting the car under enough load i.e. from a dead stop.
Which cylinder did you put that plug in? You really need to do more than one plug, at the minimum you need to check all 4 corners of the motor and even then you should do all 8.
10-23-2012, 01:40 PM
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A little hot, as in pull another degree or two of timing?
Not sure of total timing. Car has never been tuned. So stock timing -4*
I spin 2nd on the street while spraying. Not planning on spraying in 1st at the track
Like I said I hit 125. So I dont want to keep going past that speed. Or much past atleast.
That plug is from #3. I need to find more plugs and ill do the corners. Any other recommendation on how to load the car more. Should I shut it off after a run. Wait and take another run. Will that make a difference
Not sure of total timing. Car has never been tuned. So stock timing -4*
I spin 2nd on the street while spraying. Not planning on spraying in 1st at the track
Like I said I hit 125. So I dont want to keep going past that speed. Or much past atleast.
That plug is from #3. I need to find more plugs and ill do the corners. Any other recommendation on how to load the car more. Should I shut it off after a run. Wait and take another run. Will that make a difference
10-23-2012, 02:09 PM
#13
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what is done to this car? That plug looks lean with no timing in it, the cadium has not burned off yet, and I would think a full 2,3,4th gear pull is more than enough load to get a good reading on a plug. if this car just has a few bolt-ons with a small shot a 7 is not to hot of a plug. I believe stock total timing is 25* which if that is the case your at 21 total. treat reading plugs on the street like you do at the track, put a fresh one in idle as little as possible on it do a solid 1,2,3,4th gear pull and immediately shut the car down and pull the plugs.
10-23-2012, 03:32 PM
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car is intake only. thats all.
that backside and top of the electrode had a little bit of flakiness to it.
when i asked about taking anoter run, i was refering to something i read about possibly doing more then 1 pull on plugs to get a reading.
i have a 35 fuel jet, should i try upping the fuel before the next run.
that backside and top of the electrode had a little bit of flakiness to it.
when i asked about taking anoter run, i was refering to something i read about possibly doing more then 1 pull on plugs to get a reading.
i have a 35 fuel jet, should i try upping the fuel before the next run.
10-24-2012, 08:18 AM
#15
Yes if you can, copy that pull you just made then turn around and do the same thing again in the opposite direction.
This should put some more heat in the plug and allow for a better reading.
I wouldn't change anything quite yet, just re-do what you did and put another run right after your first run on the plugs again for a better reading.
This should put some more heat in the plug and allow for a better reading.
I wouldn't change anything quite yet, just re-do what you did and put another run right after your first run on the plugs again for a better reading.
10-24-2012, 07:06 PM
#16
I agree with martin. it needs more load on it. wierd it looks lean on the fuel ring but not on the barrel. But not from heat since it didn't heat the tip yet. I think you just don't have enough nitrous to get that plug hot yet. so either put more nitrous on it or a longer pull or warmer plug.
