Here we go...
I the interests of science (ahem) I am resisting the temptation to put it all in at once.
So hypojets first I think especially since I am pootling around town at present.
Out with the 45f9 and in with the H203 (this means the .020" wet jet set to reveal the 3 largest hole in the jacket)
Immediately I had to up the idle mixture to 3/4 of a turn (I have the coarse thread version on my 40DCOE18)
Then I increased this further to 7/8 open and ended up with an idle AFR of approx 12.2
Then off I went to Battersea to fill up on V-power!
I could see that I did not have a particular improvement in mixture control.
You can see the swing on the purple graph line.
It was noticeable that I did not get as many very lean spots compared with the 45f9
However it was also going a bit too rich.
So at the Shell garage I leaned out the idle mix slightly to an AFR of 12.7 (probably around 13/16 of a turn).
Doesn't go so rich but you can see the lean spikes on purple graph.
These occur when I lift off the throttle and hence only the idle mix screw holes are fueling the engine.
This is one reason why setting a 14.7 (best lean) idle will result in problems - super lean!
So lets go a bit richer, H223:
I left the idle mix screws the same and this resulted in an AFR at idle of 12.
This was only a short run as I wanted to get back to watch the Opening Ceremony (go Hawking!)
However the graph immediately looks smoother with no nasty lean spikes.
Felt good too!
So this morning I leaned the mix back a bit for the run to work:
Ended up with an idle AFR of 12.4
Ooooo look at that!
No nasty lean spikes and much more tightly bunched around the ideal afr.
Feels smoother to drive and easier to move off too.
One issue has crept in and that is the idle sometimes sticks at 1050rpm rather than the 850-900 I have set it at.
Since I have a TPS I know that the throttle is in the correct place.
This lazy idle is a known issue and I will have to go a read some posts in Keith's forum about this.
Probably to do with the position of the plates with respect the progression holes.
I aught to do some more testing before I put the custom Obert E-tubes in but not sure I can wait!