Things Your Mother never Told you about Wideband (Harley related )
All things are done on this engine and almost 300 miles on this latest adventure in attempting a 1.25 HP to one C.I.
I have been chasing my tail with this HSR42 carb and the AFR.
Between AFR, and timing Daytona TT dual plug,- what a fiasco.
I am used to AFR and Daytons as I have been running them last 4 years or so, just different head/valve configuration now.
The timing has had to be retarded even more this round. That would impose the idea the ceramic is helping the ignition process to be more efficient.
So, getting the numbers on that, and the AFR -OMG
It is all OK cold, as it gets hot it goes lean, especially near idle and OAT related.
This is very concerning as it would sometimes come down off RPM and hang over the leanest number of 17 AFR (AEM meter)
So lean the meter is just dotting.............................SCARY.
This is now what Mom never told you, and I will share after much research.
Free air.
Weeeeeeeeeeeeeee
Big cam and lobe separation causes havoc of course at Low RPM but it also will make the meter read leaner!!
Leaner numbers then what the truth is.
Swapping air!
WOW!
I wish I had known all this, and thought I would share.
So -the meter is a reference point underneath the cam and AFR more to be judged on the dyno with pull numbers.
I have 250 miles or so to go B4 I dare dyno it and do the final tune.
This would have been great information had it been included the directions.
Now I have less hair to deal with as I have spent a LOT of time looking for air leaks, tank venting ETC.
Pix show 10lbs on one cyl and 11 lbs drag on the other. (reallow low numbers)
