Speedometer reads 10% too high

NZ.Z · 11-26-2023, 12:58 PM

I think that you’ll find all the 370s do this.
I was told that Nissan were advised to set the speedometer 10% more than what it should be to reduce speeding.
So when your Speedo reads 55 you’re really only doing 50, 80 is 72, 100 is 90 and so on.

stansens · 11-27-2023, 04:21 PM

Quote:

Originally Posted by NZ.Z

I think that you’ll find all the 370s do this.
I was told that Nissan were advised to set the speedometer 10% more than what it should be to reduce speeding.
So when your Speedo reads 55 you’re really only doing 50, 80 is 72, 100 is 90 and so on.

I agree and most cars read 2-4 km high on average. After that it's most likely tire height that is responsible. My 2016 is 2 kph high with a new set of Yokohama AS and was the same with the original. Yours seems a tad high. Hope that helps

stansens · 01-07-2024, 11:33 AM

I agree. 2-4kph on the high side is normal. Frankly 8-10 is too much in MHO. See if speedo can be recalibrated proding that you are sure tire height is per factory specs. Let know what happens.

Tractionless · 12-11-2023, 11:01 AM

Quote:

Originally Posted by NZ.Z

I think that you’ll find all the 370s do this.
I was told that Nissan were advised to set the speedometer 10% more than what it should be to reduce speeding.
So when your Speedo reads 55 you’re really only doing 50, 80 is 72, 100 is 90 and so on.

My speedo reads dead on with GPS running 305/35/19's in the rear.

11-26-2023, 12:58 PM	#1 (permalink)
NZ.Z Base Member Join Date: Jan 2016 Location: Tauranga, New Zealand Posts: 39 Drives: 09 370z, platinum t. Rep Power: 11	I think that you’ll find all the 370s do this. I was told that Nissan were advised to set the speedometer 10% more than what it should be to reduce speeding. So when your Speedo reads 55 you’re really only doing 50, 80 is 72, 100 is 90 and so on. Optimiser likes this.

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01-07-2024, 11:33 AM	#3 (permalink)
stansens Base Member Join Date: Nov 2015 Location: toronto, canada Posts: 146 Drives: 2016, 370z Rep Power: 194	I agree. 2-4kph on the high side is normal. Frankly 8-10 is too much in MHO. See if speedo can be recalibrated proding that you are sure tire height is per factory specs. Let know what happens.