Spark Plug Advice Needed
Of the few people who I have known over the years that claimed to be engine tuners, I never once heard this term before
Com'on, my friend, stick with me.
Name one part on a carb, or one circuit, that is redundant.
You said it yourself, namely; "claimed to be engine tuners".
There is a very strong possibility that your tuner acquaintances DO know about this, cuz it's darn near impossible to have a sweetheart of an engine, with a poorly-tuned low-speed circuit. All of us, as tuners, strive to do a good job cuz all it takes is one bad report circulating, to affect us negatively for a long time.
Time wise and miles wise, Ima thinking more than 90% of the life of your engine is gonna be spent on the Low-speed circuit, which, principally, is the transfer slots plus mixture screws.
How important is it to get this right?
Well,
if 90% of the time your low-speed circuit is rich, or lean, or not exactly correct; is that important?
How aggravating is a tip-in sag?
How aggravating is it when you put the trans in gear and you hear this loud clang from her, and the car jumps ahead against the brakes?
What if the engine is so far off AFR that the exhaust is burning the eyes of your neighbor who is trying to have breakfast on his deck, two doors down?
and/or several times each summer you gotta buy new plugs, or the oil turns black in less than a week, and your rocker-shafts look like crap
If you manage to cover the tip-in sag with pump-shot, how much is that gonna cost you, over the life of the engine?
All of that could, or most like would, originate in, the low-speed circuit.
Unless you are a buddy of a tuner, how likely is it that this is gonna come up in conversation? Most of us are gonna get this synced up in just a few seconds, and then move on to other things. If you're watching your guy, you may not even notice him do it. Really, once a tuner gets this figured out, the tip-in sag never lies. Well let me rephrase; IMO, the tip-in sag has never fooled me, lol. But I admit, I like to idle my engines down, down, down with idle-retard, and so, the tip-in sag simultaneously jumps out of the background, making it easy to find. Once found, sync it up, and put the idle-timing back, Badaboom! maybe 30 seconds, if the distributor is already loose.
Friend, it is not my intent to befuddle you, or belittle you; we all gotta start someplace. My intent is to give you something to think about, and ammo to come back at me with, lol. I love you, as friends do.