Do these plugs look ok?

[crossram 426]

Opinions pls...tia

 

[miller]

Looks slightly lean, to me.
Others, with more experience with this new gas, chime in...

 

[Bill Monk]

http://4secondsflat.com/Spark_plug_reading.html

 

[Don Frelier]

Not an Autolite fan.

 

[Craig Jorgensen]

Opinions pls...tia

View attachment 616253 View attachment 616254

reading spark plugs doesn't work this way. Evaluation of street driving a/f ratio is much easier with a vacuum gauge and a wide band o2 sensor. In order to evaluate WOT a/f ratio and ignition timing, you need to start with a new plug, do one full power pass, and immediately remove the plug, then cut it open to see the base of the porcelain. Looking at a plug like the one in your hand with lots of street miles will not tell you much about a/f ratio or timing.

 

[khryslerkid]

reading spark plugs doesn't work this way. Evaluation of street driving a/f ratio is much easier with a vacuum gauge and a wide band o2 sensor. In order to evaluate WOT a/f ratio and ignition timing, you need to start with a new plug, do one full power pass, and immediately remove the plug, then cut it open to see the base of the porcelain. Looking at a plug like the one in your hand with lots of street miles will not tell you much about a/f ratio or timing.

And what did they do before wide band o2 sensors?

 

[oldbee]

Looks pretty good for a “street” plug pulled out. ( that’s what they did KK!, as you well know). Not overly rich or lean. Replace with the same heat range, don’t touch anything.

 

[WileERobby]

Off the pics, these ol' eyes say they look alright, but how many miles on them ?

 

[Bb70charger500]

Look good to me if they have been in there awhile . If not I'd say you need a different heat range if they have low miles on them

 

[crossram 426]

have been in there for over a year and and half.

 

[Bb70charger500]

Alot of run time? Race? Street driving ? Alot of Factor's I have a car that has had the same plugs in it since the 80's they look brand new still . I had one that needed a new set once every 2-3 months

 

[67belvedere/225]

modern fuel you never know what they put in it, i was talking to they from red line carbs in cali and he said that they tested gas on the east coast
and even the ones supposed no ethanol , did have true amounts , and who knows what else they do to it
so what you see on your plug ,unless its pure black i would leave well enough alone.
is there a problem ?

 

[67belvedere/225]

Alot of run time? Race? Street driving ? Alot of Factor's I have a car that has had the same plugs in it since the 80's they look brand new still . I had one that needed a new set once every 2-3 months

i just replace 6 plugs on a e type jag , they looked brand new , it sat all winter. and had a stumble on take off. they foul so easy .with this new fuel
after i replace them the stumble on acceleration went away.

 

[Bb70charger500]

Alot of run time? Race? Street driving ? Alot of Factor's I have a car that has had the same plugs in it since the 80's they look brand new still . I had one that needed a new set once every 2-3 months

 

[crossram 426]

A couple of thousand km since I've had it...and it cops its fair share of abuse on the street...has run a low 13 iirc before it came down under. Plugs may well be at least 5yrs old...

 

[crossram 426]

No problem, just trying to educate myself a little and learn more about the how's and why's ....

 

[beanhead]

Do you use any octane booster or similar additive products? I only ask because the insulators look a little red-orange..timing looks to be advanced toward the max, how does it run? (It could just be the pictures playing with my eyes too...)

 

[crossram 426]

It's a bugger when cold but when it warms up it's great....when finished a cruise and putting back in the garage and put into park the revs go up about 3-400 rpm and then click back into drive it chirps the tyres...so it does need a little adjusting on the carbs I think...and it has a small hesitation just off idle when punching it.

 

[crossram 426]

Only used one can of octane booster since I've had it...will have to check timing.

 

[beanhead]

Only used one can of octane booster since I've had it...will have to check timing.

I don't think that stuff hurts, just colors the plugs weird...as far as timing if it doesn't ping you should be fine