brock
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Post by brock on May 6, 2008 21:51:21 GMT -5
Green circles are rivet related & red circles point out the simple little rubbing unit that marks the last number on the odometer once it exits the viewing window. That the nine is rubbed once the car is driven from new is a given. That the number showing in the window has been rubbed indicates it has traveled through the viewing window before! So, next time you entertain buying a low mileage 6pac you can look for yourself!!! I'll be further dissecting this speedo soon enough. History: The needle was broken off by vandals. The shattered door glass & gauge lenses that led to breaking the speedo needle also led to surface rust on the gauge face.
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Post by Jer on May 7, 2008 8:08:17 GMT -5
Brockster...you need to go back to those 20 hour workdays, Brother... You have waaaay too much free time on your hands, My Man! Those are great pics, Brock, and a plethora of info that I didn't know....but I'm wondering, what exactly is your Rubbing Device marking the little numerals with? I mean, whatever that device is doing to the number, couldn't you just UNDO it? (Wipe it with a chemical, or repaint it, or something.) Thanks for taking the time to do all this Brock, and then for taking the time to pic it and post it for us. You're alright for a Cajun. #2Thumbs# Jer.
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DynoDave
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Motown Mopar-Wizard
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Post by DynoDave on May 7, 2008 12:15:35 GMT -5
Excellent info and pics Brock! Thanks for sharing.
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brock
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Post by brock on May 7, 2008 17:02:47 GMT -5
Thanks Dyno! The little rubbing pad fell off while i was removing the rivets It rubs the black paint off. Near as I can tell, the rubbing pad arm vibrates from running over bumps, etc thus causing the rubbing pad to sand off the number. Rather than try a Sharpie to freshen the numbers up, I thought, "Well, I'll just swap out the wheel with a good looking wheel from the extra odometer." But, as you know, I changed my mind. So, I'll try the Sharpie. No way the color will match.
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brock
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Post by brock on May 7, 2008 23:35:54 GMT -5
Green is 1 of the face plate mounting holes. Yellow is 1 of the 2 mounts between the front & back halves of the speedo mechanism itself. Orange is a piece of tape that once upon a time allowed light to shine through. It indicated high beam headlights were on. That's getting replaced. Red shows all but 1 part in the whole speedo mechanism. This is the stuff Frankenstein movies are made of!! The aluminum induction cup reacts to the spinning magnet & metal. The rim of the induction cup rides between the magnet & metal. The magnetic field induces a torque in the induction cup thus causing the needle to register a speed on the dial. The induction cup & the needle seen on the face of the gauge are joined on the same spindle. The coil spring seen in the green circle is adjustable. If the needle registers high add more spring tension. This is the calibrator! By specifying different induction cups a 120mph, 150mph & 240kph faceplate are feasable. Personally a 240mph faceplate would be the cats meow!!!
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Post by Jer on May 8, 2008 1:17:32 GMT -5
So, if they make a 240KMH touch up kit, there would be the answer to Nacho's search for his speedometer, right?
He just buys the kit and "converts" the face of his 150mph!!
I mean the speedo gear drive in the tranny doesn't know what type of speedometer is at the other end of the cable...it's still turning the same number of RPM's for a KPH as it is for an MPH...
and the needle is going to be pointing at the same spot...be it kilometers or miles...the conversion factor remains the same no matter what the speed is.
(Any of this making any sense...at all?)
Jer.
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brock
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Post by brock on May 8, 2008 22:30:36 GMT -5
Yes Jer That makes perfect sense. I haven't done the math. Lets see 1.6093mph = 1kph so 150mph x 1.6093 = 241.395kph. There ya have it! Now to get that overlay guy to print 1 out and you are in business Anyone know of a needle off say a later model car that looks the same? I'll have this baby ready for 1 after refinishing the face & the cleanup & lube on the mechanism. Oh, my bad - after a 16hr day; I forgot that the needle spindle is bent. More disecting is required For those that are interested: The induction cup determines the rate of needle movement. That is to say that the needle moves further from zero for a given input rpm on the 120mph speedo than on a 150mph speedo. A different magnet could also be utilized; but I doubt they did. The magnet looks plain with no special markings, but the induction cups on 2 150mph speedos are stamped 38.
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Post by Jer on May 9, 2008 13:00:41 GMT -5
Brock, I'm going to my storage unit(s) here in a few...with a little luck I will remember to grab that cluster that I'm going to "loan" you... You can pull the needle off of the speedo and keep it if you want it... Here's something from The Wierd File for you to chew on... The odometer on the black 72 SE (Shadowfax II) shows 35384.7... AND THERE'S NO "WIPE" MARK ON THE FIRST "3"... Go figure that one! If it's been around once already, shouldn't it have that little mark?
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Post by Nacho-RT74 on May 9, 2008 17:46:38 GMT -5
I can make a decal out of a 240 pic I have, but that won't be the problem... odometer will read still in miles.
already tried to fit a standart cluster odometer in kilo from my original cluster on my 150 miles rallye speedo, changing also gears on gauges, so all the assembly... doesn't fit
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brock
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Post by brock on May 9, 2008 23:05:56 GMT -5
Well Jer, I don't see wear n tear on your Shadowfax II that would amount to 100K + either clean While I believe Jer has a valid solution for the 150mph / 240 kpm dial. Nacho is right about the odometer part as well. The transfer gears will need to spin the odometer 1.6.... times faster. Doh! We forgot about that in our haste to find a solution
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