Plug Readers Chime In

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doc540

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What say you to blue? :)

lancer plug blue1.jpg
 
From the pump or 5 gal cans like the stuff sold at napa for small engines?
 
Is that effectively white ash from a lean mixture? or too hot of a plug?
Blue would make me think of copper in the fuel.

Just my thoughts ... Definitely not a plug reader!
 
Hmm- sorry dont have an answer for pump gas. I ran into the same issue with the VP non ethanol fuel on small engines. I called the tech line and they told me there was a chemical in the fuel for preservation. They told me it was not harmful and would burn off with temp change / timing shift. So far no issues.
 
Hmm- sorry dont have an answer for pump gas. I ran into the same issue with the VP non ethanol fuel on small engines. I called the tech line and they told me there was a chemical in the fuel for preservation. They told me it was not harmful and would burn off with temp change / timing shift. So far no issues.

How 'bout that? It is VP non ethanol.

Mystery solved.
 
91 octane, ethanol free

I believe You think it is ethanol free fuel, but I do not. That is WAY too light to be ethanol free fuel, IMHO. I think someone has told you a fib.
 
I believe You think it is ethanol free fuel, but I do not. That is WAY too light to be ethanol free fuel, IMHO. I think someone has told you a fib.

VP Racing Fuels, local from the pump

Regardless of what it really IS, my Slant idles smoother, runs better, and gets better mileage.
 
All I know , is the farther the porclin hangs out the hotter the plug , and it’s real white ?
 
VP Racing Fuels, local from the pump

Regardless of what it really IS, my Slant idles smoother, runs better, and gets better mileage.

What I was getting at was, with ethanol and high quality fuel, it is sometimes difficult to get a good read on plugs. Although I have been hard headed in the past, AF meters are probably your best bet.
 

Back in the day, I had bought a brand new 383 form., S fastback , I would occasionally ''borrow'' some 115/145 aviation fuel to run in it .
It tuned the tailpipe tips bluer than that, really looked odd ! Car ran like a bat out of hell with or without it / was one of supposedly two with a 330 horse roadrunner engine in it. The factory was supposed to be short of 383`s at the time of production, and used the 330 horse engine in in 2 of them, and was on stated on the window sticker !
-----------The car was pretty much uncontrollable on the tires of the day. >>>>>>>>>>>> I know , off the thread, sorry !!
 
Are your intake manifold inners the same color?
If you took your carburetor off and looked down into the manifold, blue-ish?
 
my knee-jerk reaction to that plug is it's lean

Regardless if it's ethanol or not, I shoot for cardboard brown
 
Everyone has an old Chilton's manual laying around. Open it up to the inside back cover -- you'll find a handy Spark Plug Evaluation Chart complete with photos.

:D Merry Christmas!
 
Not perfect, but I can live with this burn in a driver.

Might jet it a tad richer before long.

This is #6 using the Clifford intake.

lancer plug9.jpg
 
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I've seen blue, green, and rose colors on plugs in the past..... always figured it was from additives.

IMHO, the above 'lean and hot' reads are getting fooled by the modern fuels. Put an AFR gauge on it, and it will be in the 14-15 range cruising (maybe a tad higher even), which is fine, and really where it is supposed to be for regular driving.
 
I've seen blue, green, and rose colors on plugs in the past..... always figured it was from additives.

IMHO, the above 'lean and hot' reads are getting fooled by the modern fuels. Put an AFR gauge on it, and it will be in the 14-15 range cruising (maybe a tad higher even), which is fine, and really where it is supposed to be for regular driving.

Thanks, that's good to know.

The top plug was a tank of pure 91 octane, non ethanol running 65mph for about 140 miles.

The same plug posted just above is a mix of 91 octane, non methanol and 93 octane Shell with a combo of 45 miles, mostly highway at 60mph and 35mph in-town.

Can an AFR gauge be hooked up temporarily without having to tap into the exhaust system?
 
All I know , is the farther the porclin hangs out the hotter the plug

Be careful to mind the difference between what you know (lots of other stuff, I'm sure) and what you just think you know (this thing about "the farther the porcelain hangs out the hotter the plug", which is wrong).
 
Be careful to mind the difference between what you know (lots of other stuff, I'm sure) and what you just think you know (this thing about "the farther the porcelain hangs out the hotter the plug", which is wrong).

Dan, how's this one look to you?
It's the NGK ZFR5N (w/o washer) you recommended a while back.

And Merry Christmas.

lancer plug10.jpg
 
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