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Moving from TX to CO, should I retune when I get there?
Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
Depending on the elevation I may make some adjustments to the main lambda and spark tables tables first. I would also check that your map sensor is calibrated, if you have that table.
Depending on the elevation I may make some adjustments to the main lambda and spark tables tables first. I would also check that your map sensor is calibrated, if you have that table.
How would I verify the map sensor is calibrated? It is 11 years old now, so perhaps I should just replace it?
Sea level is 100 kpa +/-. At 6000' it's 81 kpa +/- so at this kpa you're not going to reach the higher kpa values on those tables. I do a few bikes for guys that do some stunt riding and they have a second map they can use at higher elevations where I move the higher kpa colums to the left to match the max kpa for that elevation. eg. 100kpa values over to 80 kpa. Is this right I don't know but it seems to work.
It's not so much about the sensor being wore out. The ecm "sees" the kpa. This is about calibrating the ecm to see the actual value. It's common to see it off by 6 +/- %. Do a data log of wot to see how it compares to actual. If you have a table like this you can adjust to make the ecm see the actual. Just another thing to do when tuning. Hope all this makes sense.
makes sense.
Yup but depending on your elevation open your map and compare requested values between columns. High enough elevation and you'll notice less power because of less air but that's out of our control. Just look at the sae correction factor on a high elevation dyno sheet.
Yup but depending on your elevation open your map and compare requested values between columns. High enough elevation and you'll notice less power because of less air but that's out of our control. Just look at the sae correction factor on a high elevation dyno sheet.
I'm gonna be living in Denver but obviously will want to be able to go into the mountains without issues. Seems like the O2 sensors would take care of adjusting the afr with altitude, no?
No you don't need to retune. Electronic fuel injection by it's very nature is already continuously compensating for mixture changes due to changes in elevation, barometric pressure, ambient temperature, etc. Think of it this way, there's hundreds of thousand times as many electronic fuel injected cars and trucks on the road as there is motorcycles and nobody retunes them going from low to high elevation or vice versa. You will loose horsepower going up in elevation simply because there is less oxygen to burn but short of a turbo charger there's nothing you can do about that.
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Moving from TX to CO, should I retune when I get there?
