I both agree and disagree with your post (above). LOL I'll break it down after addressing your question to me and Dr Fate.
Who said the plugs are carbon fouled?
Josh has only said the AFR numbers on his meter show richer than he was shooting for.
Even if they were showing overly rich at idle, are you saying increasing initial even more than 36* will clean them up? ?????
By itself, basically agree
Agree. Primary side anyway.
Basically disagree. Its fine to begin with 3/4 out with a four corner that has strong idle, BUT there is no magic number of turns out that is right. Adjust each one as needed for best power. Important thing is that the engine responds to adjustment. As far as the secondary throttle positions go, it depends on the carb. Again no reason they must be the same as the primaries unless doing a 1:1 linkage.
I agree that they can be tweaked further open or shut to help idle conditions. But if the t-slots are not as long as the primaries, then its best if the t-slots don't show.
I agree that Urich's 4150/60 is an excellent introduction.
I know this is a popular approach in some circles. I personally disagree with it. In my view initial timing should be chosen based on building the most power in gear at slow idle. Obviously that can not apply when a locked timing is chosen for racing.
Disagree.
As long as the PVCR is much smaller than the main jets PV will have little effect idle. But in general what Mark shows in the video here holds true.
Quick fuel carb fuel pressure too high? Rich idle...
PV opening has been covered in detail before so can refer back to that thread you're interested in why rather than make a big sidetrack in this one. 1
Power Valve Selection: The Definitive Answer
Agree