so last month i got a ticket for doing 125km/h in a 70 zone, a ticket fighter told me to see if i could loan a set of bigger rims to throw off the speedo and do a speedometer check to help reduce the fine. So i did the calculations with this http://www.miata.net/garage/tirecalc.html.
Basically i found out that the rims wouldn't throw it off enough, only about 5km/h at 100km/h, so i figured i'd used an xcal2 to adjust the revs/mile to throw it off.
Stock is 838 rev/mile
So i calculated that the max the xcal2 would let me set it 900 revs/mile, that i would be travelling at about 7.2 km/h faster at 100 km/h.
My speedo results....
actual speed speedo reads
20km/h - 22km/h
30km/h - 32km/h
40km/h - 42km/h
50km/h - 52km/h
60km/h - 61km/h
70km/h - 71km/h
80km/h - 80km/h
90km/h - 90km/h
100km/h - 100km/h
110km/h - 110km/h
120km/h - 119km/h
130km/h - 129km/h
So this mean to me that ford has displayed the speed on the speedometer almost 10kms slower that what your going. WHAT A WASTE OF $100.
I'm PISSED.
BUT HEY, MY SPEEDO IS CORRECT NOW!
Basically i found out that the rims wouldn't throw it off enough, only about 5km/h at 100km/h, so i figured i'd used an xcal2 to adjust the revs/mile to throw it off.
Stock is 838 rev/mile
So i calculated that the max the xcal2 would let me set it 900 revs/mile, that i would be travelling at about 7.2 km/h faster at 100 km/h.
My speedo results....
actual speed speedo reads
20km/h - 22km/h
30km/h - 32km/h
40km/h - 42km/h
50km/h - 52km/h
60km/h - 61km/h
70km/h - 71km/h
80km/h - 80km/h
90km/h - 90km/h
100km/h - 100km/h
110km/h - 110km/h
120km/h - 119km/h
130km/h - 129km/h
So this mean to me that ford has displayed the speed on the speedometer almost 10kms slower that what your going. WHAT A WASTE OF $100.
I'm PISSED.
BUT HEY, MY SPEEDO IS CORRECT NOW!