What should I do if my speedometer says 52?
“If you need to slow down the speedometer, you need more teeth on the driven gear.” For example, if your speedometer is showing 60 mph and it should be showing 52 mph, you will need to use a driven gear with more teeth to spin the speedometer cable slower.
What can cause a speedometer to read below the actual speed?
Aftermarket modifications, such as different tire and wheel sizes or different differential gearing, can cause speedometer inaccuracy. Private passenger vehicles generally adhere to the international standard of never reading below the actual speed of the vehicle but the indicated speed must not exceed 110% of the actual speed.
Is it possible to make your Speedo and odometer inaccurate?
You just made your speedo and odometer inaccurate. Here’s how to fix them both. If you’ve ever modified a car with smaller or larger tires or, perhaps, a different final-drive gear, you’ve immediately screwed up your speedometer. This is, of course, annoying, but for modern cars with a digital speed sensor, there’s a relatively easy way to fix it.
Which is the most accurate speedometer in the world?
Sky Drive is the world’s most accurate electronic speedometer sending unit. No need for ECU convertors or pulse signal generators screwed onto your transmission. The new Sky Drive uses GPS Satellite signals to operate your electronic speedometer. It updates 10 times per second and with one push of a button it’s ready to go.
What do I need to slow down my speedometer?
“If you need to slow down the speedometer, you need more teeth on the driven gear.” For example, if your speedometer is showing 60 mph and it should be showing 52 mph, you will need to use a driven gear with more teeth to spin the speedometer cable slower. In this case, you need to add three teeth.
Which is the correct speedometer for your car?
Unless you want the gears to wear out quickly, the driven and drive gears must be compatible. To properly choose the correct driven gear, you will need to know the outer diameter of the drive gear. When testing, mechanical speedos are typically most accurate when at 60 mph.
Why does my odometer not measure my speed?
If the odometer numbers measure accurately but the needle is not accurate for your speed, the problem is in the internal speedometer mechanism. If that’s the case, changing gears is not going to help.
How many revolutions does a GM speedometer spin?
A properly calibrated GM mechanical speedometer should spin 1,001 revolutions in one mile, in 60 seconds. As an example subject, let’s imagine we have a car with a Chevy Turbo 350 and a 3.55 rearend ratio. We’ll also use our hypothetical tire diameter of 26.1 inches.