Holley/Demon Carb stumble
Yes running a power valve, like i said theses plugs are well over a year old(Probably longer) and not a clean cut plug.
I know my idle and "tip in" is way rich.....ah well i really think so.
I finally got my o2 meter reading and it was showing 12.0 to 11 air fuel ratio threw all three gears.........
I will be buying some new plugs for the next race and a couple of spares to boot, for testing. hope to have the idle circuit/ tip in sorted out by then.
The problem with reading a spark plug after a full hit. Is that i have a reverse manual shift valve body so i have to slow down a lot before i can get it into neutral and kill it. still have the factory slap stick, that is worthless because of the reverse valve body.
I'm guessing the oil deposit was from all the lean banging (Lifting oil of the ring..?
Like i said the plugs are old and the idle circuit could be what is being seen on the plug.
Normally the ceramic is bone white. it looked different so i posted up a couple pics However i usually put a fresh plug in before i check the burn. This time i did just because i haven't pull plug for a long while.
My friend, you are SO FAR OFF you need to stop trying to pick the fly poop out of the pepper.
You ain't nowhere close to needing an O2 sensor as it's just screwing you up. And you damn sure don't need to clean cut for a plug read yet. You ain't close.
I'm not trying to hurt your feelings. I'm just telling you from decades of doing this stop looking at O2 numbers and learn to look at the plugs until you are much closer. You don't need new plugs to see how far off you are.
Get your new plugs in there. Make a pass and pull a plug when you get back. I don't like saying it this way, but a very smart tuner told me years ago (when I was too young to drive but was working on 2 strokes) don't trick **** yourself. You just don't have the experience to know when the O2 is telling you the truth or bullshitting you. Learn to read plugs. It's not that hard.
I'd start by pulling 4 sizes of main jet out of the primary and 2 out of the secondary side. Open up the idle air bleed .004 or close down the idle feed restriction .004 but take some fuel out (or add some air) of the idle side. You'll probably need Tslot restrictors. Probably need to be around .072-.078 for those. You can see where to tap the main body for those and use some 8/32 brass set screws to change the hole size. You need to do the primary and secondary side on those.
Then start making runs. When you get the idle side clean you can just drive back to the pits and read the main jet tune up until you get much closer. You don't need a new plug for every run either until you are way closer. One run on gasoline will show up. Don't look at anything other than the fuel ring in the bottom of the plug for WOT. When you get close, you can start taking the shell off the plug to measure the fuel ring.
Then, you can start clean cutting and doing a plug read. At that point you can use the O2 sensor again, but never tune to a number. Tune for MPH and then use that as your number. Not every engine will like the same A/F ratio, plus the fuel makes a difference as well.
You've got a long way to go. Don't let the fence leaners tell you you need to clean cut plug read as far off as you are.
