![]() |
speedometer replacement - Printable Version +- Wanderlodge Gurus - The Member Funded Wanderlodge Forum (http://www.wanderlodgegurus.com) +-- Forum: Yahoo Groups Archive (/forumdisplay.php?fid=61) +--- Forum: WanderlodgeForum (/forumdisplay.php?fid=63) +--- Thread: speedometer replacement (/showthread.php?tid=9478) Pages: 1 2 |
speedometer replacement - Ralph L. Fullenwider - 08-26-2011 08:05 There was a thread on this some time back about a speedo replacement from Stephen B. I ordered one as well and had no problem in figuring the math and programming the new speedo. What I did have a problem with was an extra wire coming from the back of the unit, one was grey and the other blue. The grey powers the hot side of the magnetic sensor, I took the blue to be a ground and was wrong about the blue, removed it out of the circuit and the speedo worked very well. I found some calculations on line for the programming. my tires rotate 502 times per mile and that times 60 teeth on the BB drive drum times the constant give you the ones and 10's binary switch positions and using the sum of that equation plugged into a second constant give you the hz rate figure to set the switches up with. Speedo is good and replaces the original exactly. Thanks Steve Safe travels, Ralph and Charolette Fullenwider "84FC35 "Ruff Diamond" Duncan, Oklahoma speedometer replacement - cape0001 - 08-26-2011 13:53 thank you ralph I have other gauges be sure to call and make sure I Have the gauge you want Stephen 97 BMC 37 888 668 4288 --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider" wrote: > > There was a thread on this some time back about a speedo replacement from > Stephen B. I ordered one as well and had no problem in figuring the math > and programming the new speedo. What I did have a problem with was an extra > wire coming from the back of the unit, one was grey and the other blue. The > grey powers the hot side of the magnetic sensor, I took the blue to be a > ground and was wrong about the blue, removed it out of the circuit and the > speedo worked very well. > > I found some calculations on line for the programming. my tires rotate 502 > times per mile and that times 60 teeth on the BB drive drum times the > constant give you the ones and 10's binary switch positions and using the > sum of that equation plugged into a second constant give you the hz rate > figure to set the switches up with. Speedo is good and replaces the > original exactly. Thanks Steve > > Safe travels, > > Ralph and Charolette Fullenwider > "84FC35 "Ruff Diamond" > Duncan, Oklahoma > speedometer replacement - oceanshores98569 - 08-26-2011 15:15 --- In WanderlodgeForum@yahoogroups.com, "cape0001" <sbirtles@...> wrote: > > thank you ralph > I have other gauges be sure to call and make sure I Have the gauge you want > Stephen 97 BMC 37 > 888 668 4288 > > > --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider" wrote: > > > > There was a thread on this some time back about a speedo replacement from > > Stephen B. I ordered one as well and had no problem in figuring the math > > and programming the new speedo. What I did have a problem with was an extra > > wire coming from the back of the unit, one was grey and the other blue. The > > grey powers the hot side of the magnetic sensor, I took the blue to be a > > ground and was wrong about the blue, removed it out of the circuit and the > > speedo worked very well. > > > > I found some calculations on line for the programming. my tires rotate 502 > > times per mile and that times 60 teeth on the BB drive drum times the > > constant give you the ones and 10's binary switch positions and using the > > sum of that equation plugged into a second constant give you the hz rate > > figure to set the switches up with. Speedo is good and replaces the > > original exactly. Thanks Steve > > > > Safe travels, > > > > Ralph and Charolette Fullenwider > > "84FC35 "Ruff Diamond" > > Duncan, Oklahoma > > Didn't know Stephen had speedos for sale. If I can get one, can you help me set up mine also?? speedometer replacement - Ralph - 08-26-2011 15:38 Hi Bob The hardest part is going on line to the tire manufacture and find the tire specs for your drive tires. Your looking for how many revolutions your drive tire makes in 1 mile. The rest falls into line. Safe travels, Ralph & Charolette Fullenwider '84 FC35 "Ruff Diamond" Duncan, Oklahoma Sent via BlackBerry by AT&T -----Original Message----- From: "oceanshores98569" Sender: WanderlodgeForum@yahoogroups.com Date: Sat, 27 Aug 2011 03:15:03 To: Reply-To: WanderlodgeForum@yahoogroups.com Subject: [WanderlodgeForum] Re: speedometer replacement --- In WanderlodgeForum@yahoogroups.com, "cape0001" <sbirtles@...> wrote: > > thank you ralph > I have other gauges be sure to call and make sure I Have the gauge you want > Stephen 97 BMC 37 > 888 668 4288 > > > --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider" wrote: > > > > There was a thread on this some time back about a speedo replacement from > > Stephen B. I ordered one as well and had no problem in figuring the math > > and programming the new speedo. What I did have a problem with was an extra > > wire coming from the back of the unit, one was grey and the other blue. The > > grey powers the hot side of the magnetic sensor, I took the blue to be a > > ground and was wrong about the blue, removed it out of the circuit and the > > speedo worked very well. > > > > I found some calculations on line for the programming. my tires rotate 502 > > times per mile and that times 60 teeth on the BB drive drum times the > > constant give you the ones and 10's binary switch positions and using the > > sum of that equation plugged into a second constant give you the hz rate > > figure to set the switches up with. Speedo is good and replaces the > > original exactly. Thanks Steve > > > > Safe travels, > > > > Ralph and Charolette Fullenwider > > "84FC35 "Ruff Diamond" > > Duncan, Oklahoma > > Didn't know Stephen had speedos for sale. If I can get one, can you help me set up mine also?? ------------------------------------ Yahoo! Groups Links speedometer replacement - Curt Sprenger - 08-26-2011 15:58 The Michelin site shows the RPMs per tire size...don't know about the other tire manufactures. CurtSprenger 1987 PT38 8V92 "MacAttack Racing" Anaheim Hills, CA "curtsprenger@gmail.com" One of the "Birds of a Feather" (BOF) Organizers On Fri, Aug 26, 2011 at 8:38 PM, Ralph <"rlf47@swbell.net"> wrote:
speedometer replacement - Ralph - 08-26-2011 16:39 Hi Curt: Most tire manufactures will have the diameter of their product and will convert that to per mile revs. I run 11 R 22.5 kumoho and the spec is 502 revs per mile. The Mich same size tire turns 501 per mile. As a for instance. We all run the magnetic pick up that counts the notches on the inside of the break drum. The count for the notches on Birds are 60. And most of the Birds speedometer face value is 0 to 85 mph and with the Teleflex the constant for the 0 to 85 gauge is 0.0236. So step one of finding the binary switch set up starts with 501 x 60 x 0.0236 = 710.832 This number is the HZ rate Now we take the HZ rate number and divide it by 23.61, which is the constant for the divide number and will give the binary number that is set up on the program switches in the unit. 710.832 ÷ 23.61 = 30.107. Or rounded up or down to the nearest whole number is 30 and 30 is the binary number for my system. Now we know the binary divide number and the HZ rate and that let's us program the switches. The list for the switches is found on the following web site and is in PDF http://www.v3instruments.com/industrial_instruction_sheets/programmable_speedo_odo.pdf Safe travels, Ralph Charolette Fullenwider '84 FC35 "Ruff Diamond" Duncan, Oklahoma Sent via BlackBerry by AT&T From: Curt Sprenger Date: Fri, 26 Aug 2011 20:58:31 -0700 To: Subject: Re: [WanderlodgeForum] Re: speedometer replacement CurtSprenger 1987 PT38 8V92 "MacAttack Racing" Anaheim Hills, CA "curtsprenger@gmail.com" One of the "Birds of a Feather" (BOF) Organizers On Fri, Aug 26, 2011 at 8:38 PM, Ralph <"rlf47@swbell.net"> wrote:
speedometer replacement - oceanshores98569 - 08-27-2011 09:58 Simple when you explain it. Got it saved.....my Ohtsu tires turn at 491 revs. --- In WanderlodgeForum@yahoogroups.com, "Ralph" > > Hi Curt: > > Most tire manufactures will have the diameter of their product and will convert that to per mile revs. I run 11 R 22.5 kumoho and the spec is 502 revs per mile. The Mich same size tire turns 501 per mile. As a for instance. > > We all run the magnetic pick up that counts the notches on the inside of the break drum. The count for the notches on Birds are 60. And most of the Birds speedometer face value is 0 to 85 mph and with the Teleflex the constant for the 0 to 85 gauge is 0.0236. > > So step one of finding the binary switch set up starts with > > 501 x 60 x 0.0236 = 710.832 > This number is the HZ rate > > Now we take the HZ rate number and divide it by 23.61, which is the constant for the divide number and will give the binary number that is set up on the program switches in the unit. > > 710.832 ÷ 23.61 = 30.107. Or rounded up or down to the nearest whole number is 30 and 30 is the binary number for my system. > > Now we know the binary divide number and the HZ rate and that let's us program the switches. > > The list for the switches is found on the following web site and is in PDF > > http://www.v3instruments.com/industrial_instruction_sheets/programmable_speedo_odo.pdf > > Safe travels, Ralph & Charolette Fullenwider > '84 FC35 "Ruff Diamond" > Duncan, Oklahoma > Sent via BlackBerry by AT&T > > -----Original Message----- > From: Curt Sprenger > Sender: WanderlodgeForum@yahoogroups.com > Date: Fri, 26 Aug 2011 20:58:31 > To: > Reply-To: WanderlodgeForum@yahoogroups.com > Subject: Re: [WanderlodgeForum] Re: speedometer replacement > > The Michelin site shows the RPMs per tire size...don't know about the other > tire manufactures. > > CurtSprenger > 1987 PT38 8V92 "MacAttack Racing" > Anaheim Hills, CA > curtsprenger@... > One of the "Birds of a Feather" (BOF) Organizers > > > On Fri, Aug 26, 2011 at 8:38 PM, Ralph > > > ** > > > > > > Hi Bob > > > > The hardest part is going on line to the tire manufacture and find the tire > > specs for your drive tires. Your looking for how many revolutions your drive > > tire makes in 1 mile. The rest falls into line. > > Safe travels, Ralph & Charolette Fullenwider > > '84 FC35 "Ruff Diamond" > > Duncan, Oklahoma > > Sent via BlackBerry by AT&T > > > > -----Original Message----- > > From: "oceanshores98569" > > Sender: WanderlodgeForum@yahoogroups.com > > Date: Sat, 27 Aug 2011 03:15:03 > > To: > > Reply-To: WanderlodgeForum@yahoogroups.com > > Subject: [WanderlodgeForum] Re: speedometer replacement > > > > > > > > --- In WanderlodgeForum@yahoogroups.com, "cape0001" <sbirtles@> wrote: > > > > > > thank you ralph > > > I have other gauges be sure to call and make sure I Have the gauge you > > want > > > Stephen 97 BMC 37 > > > 888 668 4288 > > > > > > > > > --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider" > > wrote: > > > > > > > > There was a thread on this some time back about a speedo replacement > > from > > > > Stephen B. I ordered one as well and had no problem in figuring the > > math > > > > and programming the new speedo. What I did have a problem with was an > > extra > > > > wire coming from the back of the unit, one was grey and the other blue. > > The > > > > grey powers the hot side of the magnetic sensor, I took the blue to be > > a > > > > ground and was wrong about the blue, removed it out of the circuit and > > the > > > > speedo worked very well. > > > > > > > > I found some calculations on line for the programming. my tires rotate > > 502 > > > > times per mile and that times 60 teeth on the BB drive drum times the > > > > constant give you the ones and 10's binary switch positions and using > > the > > > > sum of that equation plugged into a second constant give you the hz > > rate > > > > figure to set the switches up with. Speedo is good and replaces the > > > > original exactly. Thanks Steve > > > > > > > > Safe travels, > > > > > > > > Ralph and Charolette Fullenwider > > > > "84FC35 "Ruff Diamond" > > > > Duncan, Oklahoma > > > > > > Didn't know Stephen had speedos for sale. > > If I can get one, can you help me set up mine also?? > > > > > > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > > > > > > > > speedometer replacement - Don Bradner - 08-27-2011 11:21 Do all Birds use wheel mounted vs transmission mounted generators? Note that there is a math error in the top line below, but it does not affect the rounded end result. However, multiplying by 0.0236 and dividing by 23.61 is funtionally the same as dividing by 1000, so 501 x 60 / 1000 = 30.06 which is close enough to the 30.047 that using .0236 and 23.61 would give. On 8/27/2011 at 4:39 AM Ralph wrote: >501 x 60 x 0.0236 = 710.832 >This number is the HZ rate > >Now we take the HZ rate number and divide it by 23.61, which is the >constant for the divide number and will give the binary number that is set >up on the program switches in the unit. speedometer replacement - Ralph L. Fullenwider - 08-27-2011 15:17 Don: The last magnetic pick up or Proximity switch, same thing, that I replaced was on a '95 Bird, so I know it was there up to that year model and I do not know about further years. Another thing that I know, the math that I reported on to set the simple binary switches up for the divide number and the Hertz rate worked. So why confuse with mumbo jumbo of equation changes from a known good formula written for the Teleflex gauge. My install and use of the programming from the web site I published to anyone needing it, worked very well without your change. Safe travels, Ralph and Charolette Fullenwider "84FC35 "Ruff Diamond" Duncan, Oklahoma At 04:21 PM 8/27/2011 -0700, you wrote: >Do all Birds use wheel mounted vs transmission mounted generators? > >Note that there is a math error in the top line below, but it does not >affect the rounded end result. > >However, multiplying by 0.0236 and dividing by 23.61 is funtionally the >same as dividing by 1000, so >501 x 60 / 1000 = 30.06 which is close enough to the 30.047 that using >.0236 and 23.61 would give. > >On 8/27/2011 at 4:39 AM Ralph wrote: > > >501 x 60 x 0.0236 = 710.832 > >This number is the HZ rate > > > >Now we take the HZ rate number and divide it by 23.61, which is the > >constant for the divide number and will give the binary number that is set > >up on the program switches in the unit. > > > speedometer replacement - Don Bradner - 08-27-2011 16:18 I always try to simplify formulas where possible. I suspect it was the sheer number of decimals used that lead to your making the math error in that top line - when you make an error that affects 5 of the 6 digits you are fortunate that rounding got you to the right answer. The teleflex document is of necessity a complex one, because of the many different speedometers involved. It just happens that OUR 85MPH speedometer is the one where the .0236 and 23.61 can be cancelled into a simple 1/1000. Thanks for the info on the pickup - I had thought that it might be coming from the DDEC on mine; internally my DDEC II stopped recording miles (but still has MPH) a few years ago. Don Bradner 90 PT40 "Blue Thunder" My location: http://www.bbirdmaps.com/user2.cfm?user=1 On 8/27/2011 at 10:17 PM Ralph L. Fullenwider wrote: >Don: > >The last magnetic pick up or Proximity switch, same thing, that I replaced >was on a '95 Bird, so I know it was there up to that year model and I do >not know about further years. > >Another thing that I know, the math that I reported on to set the simple >binary switches up for the divide number and the Hertz rate worked. So why >confuse with mumbo jumbo of equation changes from a known good formula >written for the Teleflex gauge. My install and use of the programming from >the web site I published to anyone needing it, worked very well without >your change. > >Safe travels, > >Ralph and Charolette Fullenwider >"84FC35 "Ruff Diamond" >Duncan, Oklahoma > >At 04:21 PM 8/27/2011 -0700, you wrote: >>Do all Birds use wheel mounted vs transmission mounted generators? >> >>Note that there is a math error in the top line below, but it does not >>affect the rounded end result. >> >>However, multiplying by 0.0236 and dividing by 23.61 is funtionally the >>same as dividing by 1000, so >>501 x 60 / 1000 = 30.06 which is close enough to the 30.047 that using >>.0236 and 23.61 would give. >> >>On 8/27/2011 at 4:39 AM Ralph wrote: >> >> >501 x 60 x 0.0236 = 710.832 >> >This number is the HZ rate >> > >> >Now we take the HZ rate number and divide it by 23.61, which is the >> >constant for the divide number and will give the binary number that is >set >> >up on the program switches in the unit. >> >> >> > > > >------------------------------------ > >Yahoo! Groups Links > > > |