#136715 - 06/01/07 11:33 PM
Which is more accurate?
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Junior Member
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Registered: 11/26/06
Posts: 25
Loc: Bronx, NY
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I've noticed a difference of about 2 mph between the HUD and the speedometer (the speedometer is always faster). Which is more accurate? I'm thinking the HUD because it's probably getting its info from the ECM.
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2000 GTP
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#136716 - 06/01/07 11:58 PM
Re: Which is more accurate?
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Member
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Registered: 05/23/03
Posts: 8078
Loc: Austin, TX
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I believe the PCM also controls the speedo. The speedometer is electronic.
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Bobby Died 5/1/08, resurrected 5/15/08 ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.
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#136717 - 06/02/07 01:01 AM
Re: Which is more accurate?
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Member
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Registered: 05/01/02
Posts: 2126
Loc: Portland Or.
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I've always gone under the assumption that a digital readout is going to be more accurate than an analog read...... That's just my thoughts.
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#136718 - 06/02/07 01:42 AM
Re: Which is more accurate?
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Member
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Registered: 08/09/03
Posts: 3256
Loc: Oregon
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You need to find one of those police radar guns that displays your speed. Do your own experiment to see which is closer.
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#136720 - 06/02/07 09:55 AM
Re: Which is more accurate?
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Member
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Registered: 05/23/03
Posts: 8078
Loc: Austin, TX
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I know my HUD is 1 mph off (+) to actual speed. I never look at my speedo so I have no idea what it says, for all I know it may not even work.
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Bobby Died 5/1/08, resurrected 5/15/08 ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.
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#136721 - 06/02/07 10:41 AM
Re: Which is more accurate?
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Member
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Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
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Originally posted by AustinGTP: I never look at my speedo so I have no idea what it says, for all I know it may not even work. x2! I love my HUD!
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Corey Smith
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#136722 - 06/02/07 11:01 AM
Re: Which is more accurate?
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Member
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Registered: 04/13/06
Posts: 6709
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PowerTuner, even more accurate out to the 100th decimal.
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2002
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#136723 - 06/02/07 11:18 AM
Re: Which is more accurate?
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Member
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Registered: 12/01/04
Posts: 483
Loc: Colorado Springs
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I don't look at the speed-o either. Gonna feel weird buying another car without the hud....
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#136724 - 06/02/07 11:35 AM
Re: Which is more accurate?
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Member
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Registered: 04/13/06
Posts: 6709
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X2! However, alot of newer vehicles are coming with digital displays, just not on the windshield, bummer.
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2002
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#136725 - 06/03/07 02:30 PM
Re: Which is more accurate?
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Member
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Registered: 11/03/06
Posts: 363
Loc: Green Bay Wisconsin
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My HUD is 2mph faster than the speedo, and I finally found one of those speed trailers that the cops put on the side of the road. The ones that take you pic if you go too fast.
According to that my HUD is correct.
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CAI, 180deg thermostat If Your Drinking A Coke Please PM Me The Code Eh?
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#136726 - 06/03/07 07:24 PM
Re: Which is more accurate?
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Member
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Registered: 05/11/07
Posts: 43
Loc: Toronto, Ont.
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I hear yahs completely. When I get into my truck and work now I always catch myself looking for the hud heh.
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http://www.rbcroyalbank.com/RBC:RkdJo471JsUAAj4MWLI/cgi-bin/travel/fxconvert.pl Currency Calc.
K&N CAI, custom 3" Dp, U bend delete, resinator removed. high flow cat, 3.5" pulley, incar Overkill PCM tune, 180* tstat.
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#136727 - 06/03/07 09:50 PM
Re: Which is more accurate?
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Member
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Registered: 04/13/06
Posts: 6709
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I noticed mine today on a 2.5 hour drive, it was Dead on!
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2002
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#136728 - 06/03/07 10:58 PM
Re: Which is more accurate?
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Member
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Registered: 04/30/06
Posts: 3201
Loc: Groton, CT
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wishin' I had an HUD...
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'97 SE with alot of mods
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#136729 - 06/04/07 12:01 AM
Re: Which is more accurate?
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Member
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Registered: 04/13/06
Posts: 6709
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I'm wishing for you...
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2002
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