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Originally Posted by Samuelrd1
Looks Great, but I don't get your comment about you FE being off, but your speedometer OK. If your tires are the correct circumference to keep your speedometer from being effected, then how can any other measurement be off?
I know it's not the point of the post, but I was just curious.  |
Look at the thread started by WVGasGuy (link provided below) that talked about the known issue with speedometer and odometer being off in 07 Camry, and he figured exact %differences using his GPS. Problem is that the two errors are in different directions, the speedometer was 5% too fast and the odometer reading was 1.5% too low. So I used larger circumference tires than stock in order to correct for the speedometer error, but that introduces an even greater error in the odometer. My new tires 235/50/18 are 4.2% larger o.d. than the stock 215/60/16. Therefore the calculated FE will be way off, since my reported mileage is now 1.5% + 4.2% short from actual mileage. Again, I'm not going to get into these detailed calculations in this thread, nor debate pros/cons of doing what I did, so please look up WVGasGuy's thread for more details since that is the appropriate thread for those discussions.
http://www.greenhybrid.com/discuss/n...&highlight=gps
