Originally Posted by
John_M_
That's a reasonable price Bert... the readings are + or - 5%, from the 1% scale, still accurate enough to tune with... any mention or precautions regarding oil vapor using pre-mixed fuels, or 2 stroke oil injection... the water separator will catch some oil vapor, but I would still take measures to protect the sensor from oil contamination.
The scale is in 0,1% increments, acc manufacturer accuracy is 0,5%
At least on the putt-putt boat engine, the exhaust is 100% oil free. The muffler does not even get warm to the touch, and is fitted with an oil and water drain.
I will still have to figure out how that will turn out with the MUCH hotter running aero engines, most likely I will need an exhaust adapter with an oil absorption set-up, maybe route the gasses through a Viledon filter or similar.
Originally Posted by
John_M_
It will also show a change in CO with base ign timing changes, especially with your custom cam profile grind & valve timing changes you made with that particular putt putt boat engine... post another video when you get it all setup, I enjoy watching your boat projects.
To be honest, I never even considered the effect of ignition timing on CO content. All my engines are timed for 28 degrees. If I have the opportunity, I'll do some experimenting on that.
Am I correct in thinking that advanced ignition reduces CO and retarded ignition increases it? (just a hunch based on advanced ignition resulting in more time for the burn and an intenser burn, retarded timing resulting in a shorter burn time and less intense burn process).