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Speedometer reading is not accurate
Posted: Tue Nov 24, 2009 8:24 pm
by soxfan
I noticed while looking at some of my datalogs today that with a MAP tune, the speedo indicates 3mph higher than what the datalog shows. For instance, I had the cruise control set at 80mph, but the speed indicated on the datalog is 77 mph. This doesn't happen with the stock calibration. Why is that?
Posted: Wed Nov 25, 2009 2:04 am
by maiku
Double check your speed compensation didn't get messed with in your calibration. That function is there for people who run different size rims/tires.
Posted: Wed Nov 25, 2009 8:51 am
by VitViper
soxfan wrote:I noticed while looking at some of my datalogs today that with a MAP tune, the speedo indicates 3mph higher than what the datalog shows. For instance, I had the cruise control set at 80mph, but the speed indicated on the datalog is 77 mph. This doesn't happen with the stock calibration. Why is that?
I can confirm this is happening.
maiku wrote:Double check your speed compensation didn't get messed with in your calibration. That function is there for people who run different size rims/tires.
Speed compensation has not been touched.
Posted: Wed Nov 25, 2009 9:31 am
by soxfan
nope, never touched the speed compensation