ODMETER PROBLEM, PLEASE HELP! - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-23-2006, 10:26 PM   #11
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Quote:
Originally Posted by Technical Ted
if the speedo is showing 30 kilometers your going about 18 mph.
You've got something there.

I'm still confused as to how he thinks it'* off by 13mph. How can a speedo be set for kms unless it'* a Canadian car?
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Old 06-23-2006, 10:26 PM   #12
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Quote:
Originally Posted by Technical Ted
if the speedo is showing 30 kilometers your going about 18 mph.
Like Technical Ted was saying the 30 kp = 18 mph.

The conersion is:

1KPH = 0.62137 MPH
1MPH = 1.609344 KPH
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Old 06-23-2006, 10:35 PM   #13
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Quote:
Originally Posted by Cheetah
Quote:
Originally Posted by Technical Ted
if the speedo is showing 30 kilometers your going about 18 mph.
Like Technical Ted was saying the 30 kp = 18 mph.

The conersion is:

1KPH = 0.62137 MPH
1MPH = 1.609344 KPH
I'm not denying that. That'* what actually makes sense to me.
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Old 06-23-2006, 10:39 PM   #14
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Some cars can switch between MPH & KPH. I guess the big question is can this be done in a 96 SE?
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Old 06-23-2006, 10:48 PM   #15
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I cannot do it in my car (97 SSEi) to the spedometer on the dash or the HUD. I've looked and the manual does not metion a thing about it
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Old 06-23-2006, 10:52 PM   #16
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Does your speedo have two sets of numbers?
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Old 06-23-2006, 10:53 PM   #17
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It does, but not for the HUD
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Old 06-23-2006, 10:54 PM   #18
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Quote:
Originally Posted by Technical Ted
Some cars can switch between MPH & KPH. I guess the big question is can this be done in a 96 SE?
That'* what'* got me stumped. On a 96 SE it'* not possible. He'd have the normal speedo that has mph on top and km on the bottom. And I doubt he has a HUD. But if he did it would clearly say km or mph which would be impossible to confuse.

The new speedos have one set of numbers which switches between miles and kms.

He says his speedo is at 30mph, but he knows he really is doing 17mph. How would he even know his 'real' speed is 13mph slower? Anyone see what I mean? Something isn't right..or I'm just really off tonight.
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Old 06-23-2006, 11:16 PM   #19
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Maybe the original poster can give us some more info. Do we all agree that changing to those tires wouldn't change the speedo by more than 10%?
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Old 06-23-2006, 11:19 PM   #20
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Quote:
Originally Posted by Technical Ted
Maybe the original poster can give us some more info. Do we all agree that changing to those tires wouldn't change the speedo by more than 10%?
Definitely. A 13mph difference is way too much. The 15" tires were 60 sidewall, and the 16" tires have a 50 sidewall. Almost seems like they would cancel each other out. I don't know what that is in inches, but I don't see how it can be that much larger.

I think we need more precise info. The diameter of both wheels w/ tires would be a start.
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