Joined
·
1,880 Posts
I noticed Pegleg's response to the 200mph vid and I am wondering if there is a percentage that the speedo's are usually out by or if they tend to get wildly inaccurate over certain speeds.
I am just wondering because mine is uncannily accurate at 140 mph.
On the dyno 4th gear 7800 rpm (i think) dyno reading 137 mph.
At bedford on the back straight 4th gear 8000 rpm reading 140 on the speedo.
I cannot confirm other speeds but I would have thought that an allowance of 5-10 % out either way (and usually over) would be the norm. I think the police used to allow 10%but that is unconfirmed.
This would equate to 137 real speed being 143.85 - 150 on the clock.
Perhaps Guy is the best person to answer having had a 33 and a GPS gismo.
thanks for any input.
/Steve
I am just wondering because mine is uncannily accurate at 140 mph.
On the dyno 4th gear 7800 rpm (i think) dyno reading 137 mph.
At bedford on the back straight 4th gear 8000 rpm reading 140 on the speedo.
I cannot confirm other speeds but I would have thought that an allowance of 5-10 % out either way (and usually over) would be the norm. I think the police used to allow 10%but that is unconfirmed.
This would equate to 137 real speed being 143.85 - 150 on the clock.
Perhaps Guy is the best person to answer having had a 33 and a GPS gismo.
thanks for any input.
/Steve