speedo error
08-06-2011, 11:51 PM
#1
Pro
Thread Starter
speedo error
I know 911's have some speedometer error, when my 996 tells me I'm going 100 how fast am I really going? Is the error shared by all 911's or does it vary from model and year ect?
08-07-2011, 11:43 AM
#6
Rennlist Member
And it is also 4 mph at 50, 60, 70, and 80. You have an electronic speedo that has a built in error from the factory of about +4 mph at most speeds.
I admit, I have not checked it with my GPS at speeds over 100 mph.
However, does 4 mph really matter at any speed? Only if you are driving through radar traps at the speed of heat.
If you know that:
A. You have 4 mph give to the plus side, and
B. Police generally won't give you a ticket for doing only 4 mph over the posted limit, then
C. You might assume that driving an indicated +8 mph over the posted speed limit should be safe... unless,
D. You are driving a Porsche,...
E. Particularly if it is red, or a convertible with the top down.
I admit, I have not checked it with my GPS at speeds over 100 mph.
However, does 4 mph really matter at any speed? Only if you are driving through radar traps at the speed of heat.
If you know that:
A. You have 4 mph give to the plus side, and
B. Police generally won't give you a ticket for doing only 4 mph over the posted limit, then
C. You might assume that driving an indicated +8 mph over the posted speed limit should be safe... unless,
D. You are driving a Porsche,...
E. Particularly if it is red, or a convertible with the top down.
08-07-2011, 11:53 AM
#7
Pro
Thread Starter
My escort 8500 sniffs those mirror shade wearin jack booted party poopers long before they can get a gun on me! (famous last words).
The "only blowin the carbon out officer!" defense actually worked for me once before a judge.
The "only blowin the carbon out officer!" defense actually worked for me once before a judge.
Last edited by buddy911t; 08-08-2011 at 01:16 AM.
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08-07-2011, 02:48 PM
#9
Burning Brakes
My gps says -3 mph too. Never checked at 100, but even when the speedo says 30 I'm going 27...it drives people in my neighborhood nuts since I won't go over 30 on the speedo.
08-07-2011, 04:44 PM
#13
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+3 or is it 4. Checking my GPS, I'm at +4 as well. As far as the Escort vs. the V1, I thought long and hard, did a lot of reading, and bought the escort 9500xi. Great detector, little falsing. It is an up to date detector. The V1 is old technology.
Larry
Larry
08-07-2011, 05:04 PM
#14
Three Wheelin'
08-07-2011, 06:19 PM
#15
Racer
i read 2 mph higher than gps at all speeds i have looked at (probably 90 or so). also checked it against fixed/unmaned police radar trailers in my town. same 2mph higher than the radar trailer says.