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Dynojet Stage 3 Kit

  • Thread starter Thread starter Anthony
  • Start date Start date
Is a wideband like the Morgan ColorTune? Helps get the fuel mixture set?
 
Anthony said:
Is a wideband like the Morgan ColorTune? Helps get the fuel mixture set?
Click to expand...

WB directly measures AFR at any speed rpm throttle opening.it does have a dynamic response and does require calibration.
 
posplayr said:
After using a wbo2, I can't even imagine how plug chops are anything but the crudest form of tuning.
Click to expand...
I could not agree more. I come from the automotive world, where I use my wideband for many things. When I first heard of plug chops, I nearly choked.

Anthony said:
Is a wideband like the Morgan ColorTune? Helps get the fuel mixture set?
Click to expand...
A wideband is an 02 sensor with a data collector attached. Your automobile has at least 2 02 sensors. One in front of the catalytic converter. It is used by the engine computer to make small adjustments to the fuel injectors to dial them in for maximum efficiency. The other is behind the cat and is used by the computer to judge cat health. They are called narrow band 02 sensors because their voltage range is very small.
A wideband is a special 02 sensor with a very wide voltage, hence wideband. It is used to adjust the Air-to-Fuel-Ratio, or AFR.
A very popular brand is Innovate. I use an LM-1, which is a portable unit. Posplayr uses one that stays on his bike.
Here is some reading on what they do, just pick a thread and start reading.
 
Btw, my LM-2 and lma -3 setup was a temporary install. What I found is that to get a proper tune, I had to find a long uphill so that I could maintain semi constant conditions at different throttle settings. Before that, I tried the factory pro method of winding out to deadline as not working well. Running up through the gears on flat road with a mildly tuned 1166 is just too dynamic.

One of the other members here told me that the tell tail for proper main was that (IIRC)the afr would rise as you went past redline. No way to see that with a plug chop.
 
Last edited:
The variable in that, Jim, is the fact that we are running CV carbs. The reason the long uphill worked is because it allowed the slide to catch up to the butterfly valve. IMHO.
Just a thought.
 
Anthony said:
Is a wideband like the Morgan ColorTune? Helps get the fuel mixture set?
Click to expand...

koolaid_kid said:
The variable in that, Jim, is the fact that we are running CV carbs. The reason the long uphill worked is because it allowed the slide to catch up to the butterfly valve. IMHO.
Just a thought.
Click to expand...

Tom that is exactly the point how are you going to get a proper afr reading when you are popping through gears every 3 seconds? With the up hill load the slide to get to a semi constant level which you can see as a leveling of the afr at a constant throttle position.
If you have a 40-50 hp motor you can maybe get to a slow acceleration at 80 mph but with 130+. ( at crank) no dice.
 
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