Speedometer v HUD - Which is more accurate?

[cheezmunky]

Around 70-80 mph my speedometer is about 2 mph slower than HUD and the difference gets greater the faster I go. I know speedometers aren't as accurate at high speeds but is the HUD any better? I don't know how the HUD works so I was wondering which is more accurate. Thanks.

[GTPCatz]

I believe they both read from the same signal from the PCM....so they should not differ at all

You may have a broken Speedometer....so I would guess the HUD is more accurate

[ericvrose]

Every post I've ever read about this, and there are many, the speedometer is always 2 mph slower than the HUD. I dont know which is the accurate one. But it's normal.

[tkhilliard]

i read on a sight that GM will not do anything up to 5mph difference. my 02 gt does the same thing, it annoying

[kustomkid54]

The one nice thing about the HUD is it will read your speed to 199 MPH!!!! Speedometer are nice for stop and go city driving.

[94sportsedan]

My speedo reads 2mph higher than the HUD and my laptop/autotap reads 1mph lower than the hud.

[GTPWarrior]

Mine reads 1.5 to 2.5 miles faster then my HUD.
If anyone finds out please let me know wich is more accurate.

[hardywang]

My speedo reamd about 2km faster than HUD when I drive at around 100km/h.

[kustomkid54]

All I can say is, unless you are doing 5 to 10 miles over, most cops won't give you a ticket. So take it easy out there.

[theblurr87]

Originally Posted by kustomkid54

All I can say is, unless you are doing 5 to 10 miles over, most cops won't give you a ticket. So take it easy out there.

5 to 10? maybe in florida...here in jersey you have to be doing in exess of 25 over to get a ticket.. my dad drove right by a cop who was on the road with him doing 75 in 55..all he got was a warning!

[kustomkid54]

Well in East Detroit Michigan, I got a ticket for 31 in a 30. And lost in court. I was driving my 70' Nova, with 13" slicks and headers and the list goes on. I don't think they wanted me back.

[GTPWarrior]

Originally Posted by theblurr87

5 to 10? maybe in florida...here in jersey you have to be doing in exess of 25 over to get a ticket.. my dad drove right by a cop who was on the road with him doing 75 in 55..all he got was a warning!

He got lucky thats all. I used be stationed in VA and drove through Jersey every other weeekend so I know you can get a ticket for anything over ten. If I am not mistaken I believe anything over 25 is reckless driving by law.

[kustomkid54]

Well in Florida, these people can do 30 and should be charged for reckless driving!!!