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17-07-2006, 09:47am
Nope Volvi you send over read signal (speedo healer does) to speedo so it drops the speedo back (when speedo is reading fast that is ) it's this over read that causes the odometer to record more than actual distance travelled.
Note below >>>
The 220 mph faceplates use a different scale than the 186 gauges. This is because it needs to cram the extra range into the available space. the gauge cluster has no idea the faceplates were changed and assumes that point A (we'll use the max speed of 186 as an example) is 186. When a 220 faceplate is installed, point A is no longer 186, but it is now 210. This is an equal percentage throughout the arc of the speedometer. The difference is a linear +13%. The table below assumes a 220mph faceplate is installed on a 186 mph gauge.
Original reading: Is now going to read:
25 28.25
50 56.5
100 113
150 169.5
186 210.18
This can easily be fixed with a speedometer calibrator such as the Yellow Box. BUT, this is very important, the speedometer and odometer work off of the exact same signal from the speed sensor and is independently calculated on the circuit board inside the gauge cluster to come up with the mileage traveled. When the signal is turned ahead by 13% to correct for the difference in the faceplates, the odometer then will read 13% too high. So, for every 1000 miles you travel, it will actually record 1130 miles.
FF1 Edited by: fasterfaster1 at: 17/7/06 1:19 pm
Note below >>>
The 220 mph faceplates use a different scale than the 186 gauges. This is because it needs to cram the extra range into the available space. the gauge cluster has no idea the faceplates were changed and assumes that point A (we'll use the max speed of 186 as an example) is 186. When a 220 faceplate is installed, point A is no longer 186, but it is now 210. This is an equal percentage throughout the arc of the speedometer. The difference is a linear +13%. The table below assumes a 220mph faceplate is installed on a 186 mph gauge.
Original reading: Is now going to read:
25 28.25
50 56.5
100 113
150 169.5
186 210.18
This can easily be fixed with a speedometer calibrator such as the Yellow Box. BUT, this is very important, the speedometer and odometer work off of the exact same signal from the speed sensor and is independently calculated on the circuit board inside the gauge cluster to come up with the mileage traveled. When the signal is turned ahead by 13% to correct for the difference in the faceplates, the odometer then will read 13% too high. So, for every 1000 miles you travel, it will actually record 1130 miles.
FF1 Edited by: fasterfaster1 at: 17/7/06 1:19 pm