Re: math question
[Re: Mr.Yuck]
#1298029
09/05/12 03:37 PM
09/05/12 03:37 PM
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Joined: Jan 2003
Posts: 10,748
North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,748
North Dakota
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Well, if you drove 60 miles in one hour at a constant speed, by your figures your odometer should show 54 miles. Or the speedometer would have read 54 mph when you were driving. That's your answer.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: math question
[Re: Mr.Yuck]
#1298030
09/05/12 03:52 PM
09/05/12 03:52 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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It's 10% slow. need a speedo gear with 10% less teeth than the one in there now. IE 10% of a 35 tooth gear would be 3.5. 35 minus 3.5 is 31.5. You said "almost .9" so i'd round up to 32 teeth gear needed. This is assuming that the speedo (which is triggered by the odo) is working properly. Best is to use the odo as a baseline & get the right tooth by checking the odo with GPS or interstate mile markers to get the odo correct then checking the speedo with a roadside digital MPH sign or GPS to see if the speedo is correct then at that point if the speedo is incorrect with the odo correct the speedo head needs to come out & taken to a speedometer specialty shop to be recalibrated. EDIT I might be backwards on the "almost .9", direction, may need to round the # DOWN to 31 teeth for example
Last edited by RapidRobert; 09/05/12 04:17 PM.
live every 24 hour block of time like it's your last day on earth
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Re: math question
[Re: RapidRobert]
#1298031
09/05/12 04:12 PM
09/05/12 04:12 PM
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Joined: Sep 2003
Posts: 1,168
Vancouver, WA
MoparMarq
super stock
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super stock
Joined: Sep 2003
Posts: 1,168
Vancouver, WA
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Quote:
It's 10% slow. need a speedo gear with 10% less teeth than the one in there now. IE 10% of a 35 tooth gear would be 3.5. 35 minus 3.5 is 31.5. You said "almost .9" so i'd round up to 32 teeth gear needed. This is assuming that the speedo (which is triggered by the odo) is working properly. Best is to use the odo as a baseline & get the right tooth by checking the odo with GPS or interstate mile markers to get the odo correct then checking the speedo with a roadside digital MPH sign or GPS to see if the speedo is correct then at that point if the speedo is incorrect with the odo correct the speedo head needs to come out & taken to a speedometer specialty shop to be recalibrated.
Agreed, but he said "almost" .9, so perhaps 31 teeth would be better if there's a 35 in there now (is there such a gear?) Anyway, a longer test section drive would be recommended - at least 2 miles, but preferably 5.
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Re: math question
[Re: MoparMarq]
#1298033
09/05/12 04:32 PM
09/05/12 04:32 PM
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Joined: Jan 2003
Posts: 75,080
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,080
U.S.S.A.
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Quote:
Quote:
It's 10% slow. need a speedo gear with 10% less teeth than the one in there now. IE 10% of a 35 tooth gear would be 3.5. 35 minus 3.5 is 31.5. You said "almost .9" so i'd round up to 32 teeth gear needed. This is assuming that the speedo (which is triggered by the odo) is working properly. Best is to use the odo as a baseline & get the right tooth by checking the odo with GPS or interstate mile markers to get the odo correct then checking the speedo with a roadside digital MPH sign or GPS to see if the speedo is correct then at that point if the speedo is incorrect with the odo correct the speedo head needs to come out & taken to a speedometer specialty shop to be recalibrated.
Agreed, but he said "almost" .9, so perhaps 31 teeth would be better if there's a 35 in there now (is there such a gear?) Anyway, a longer test section drive would be recommended - at least 2 miles, but preferably 5.
Pretty sure there is a 35 tooth gear , I may have one in the stash.
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Re: math question
[Re: JohnRR]
#1298034
09/05/12 05:17 PM
09/05/12 05:17 PM
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Joined: Nov 2004
Posts: 9,312
SoCal
68HemiB
master
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master
Joined: Nov 2004
Posts: 9,312
SoCal
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Let me take this opportunity to share an observation that once led to some confusion. Perhaps the reason why the response is <crickets> when I have brought this up in the past is that everyone else in the world already gets this, and I am the only doofus on the planet...
Once upon a time, the PART NUMBER for the gears ended in a two-digit number that corresponded to the number of teeth on the gear. That two digit number was also molded into the gear. Straight-forward idea, and an aid to quick identification.
Time passes, and for whatever reason, the old part numbers get superseded by new ones. Of course, the new numbers have no such last-two-digits-are-the-number-of-teeth rule. But the [now meaningless] last two digits of the part number are STILL molded into the gear, because that's the way the old ones were made. Moral of the story: be sure to count the actual teeth.
Something useful to know when swapping gears in and out.
or not
Down to just a blue car now.
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Re: math question
[Re: MoparMarq]
#1298035
09/05/12 05:30 PM
09/05/12 05:30 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
OP
Not enough dumb comments...yet
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OP
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
It's 10% slow. need a speedo gear with 10% less teeth than the one in there now. IE 10% of a 35 tooth gear would be 3.5. 35 minus 3.5 is 31.5. You said "almost .9" so i'd round up to 32 teeth gear needed. This is assuming that the speedo (which is triggered by the odo) is working properly. Best is to use the odo as a baseline & get the right tooth by checking the odo with GPS or interstate mile markers to get the odo correct then checking the speedo with a roadside digital MPH sign or GPS to see if the speedo is correct then at that point if the speedo is incorrect with the odo correct the speedo head needs to come out & taken to a speedometer specialty shop to be recalibrated.
Agreed, but he said "almost" .9, so perhaps 31 teeth would be better if there's a 35 in there now (is there such a gear?) Anyway, a longer test section drive would be recommended - at least 2 miles, but preferably 5.
I did it for about 5 miles...mile markers, each mile was about .9 mile/per mile. Not sure what gears are in the thing. Hey but at least I'm not putting many miles on the truck... 
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Re: math question
[Re: BSB67]
#1298037
09/05/12 08:22 PM
09/05/12 08:22 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
OP
Not enough dumb comments...yet
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OP
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
If you do it for 5 miles, it will be more accurate than 1 mile 5 times.
yes.. I did then I divided by 5 so it's almost .9/per actual mile. I'll do the 15 mile stretch of highway tomorrow
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