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| Bouncy speedo https://slantsix.org/forum/viewtopic.php?t=6211 |
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| Author: | Jopapa [ Mon Jul 07, 2003 5:10 pm ] |
| Post subject: | Bouncy speedo |
Since I have the cluster torn apart, I'm wondering if there's anything I can do to make the speedo run smoother without bouncing like crazy at low speeds. The cable is all lubed up and turns without any resistance at all, so I'm wondering if this is something that can be done with the gearbox. Would the gauge still be accurate if I tightened the spring that pulls the needle back? |
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| Author: | Pierre [ Mon Jul 07, 2003 6:06 pm ] |
| Post subject: | |
My needle is also bouncy below 30mph, and sometimes it doesn't work at all so when I get around to it I am going to replace the entire speedo. It is magneticly based and I have a feeling it just lived its lifetime. I'm thinking of going electronic. |
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| Author: | Seis Inclinado [ Mon Jul 07, 2003 6:13 pm ] |
| Post subject: | Bouncy Speedo |
Jopapa You will loose some acuracy. The spring is to recalibrate to proper MPH reading. Your bouncy state probably comes from the plastic bushing on which the shaft from the bell to the needle moves. Check your bushing, it may be broken not worn out.  I had this happen to me. Rafa |
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| Author: | Jopapa [ Mon Jul 07, 2003 7:27 pm ] |
| Post subject: | Re: Bouncy Speedo |
Quote: Jopapa
Where would I be able to find a replacement bushing?You will loose some acuracy. The spring is to recalibrate to proper MPH reading. Your bouncy state probably comes from the plastic bushing on which the shaft from the bell to the needle moves. Check your bushing, it may be broken not worn out. I had this happen to me. Rafa What about the magnetic system that Pierre mentioned? The cluster is the standard A-body cluster from a 1970 Dart Swinger. |
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| Author: | Seis Inclinado [ Tue Jul 08, 2003 6:31 pm ] |
| Post subject: | Re: Bouncy Speedo |
Quote: What about the magnetic system that Pierre mentioned? The cluster is the standard A-body cluster from a 1970 Dart Swinger. Only fix is getting another odometer from a similar cluster, or if you are good at fixing tiny things you can try a drop of crazy glue (applied with the tip of a pin, not directly from the bottle) to the bushing. Rafa |
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| Author: | Pierre [ Tue Jul 08, 2003 10:44 pm ] |
| Post subject: | |
Hmm I could be wrong I thought it was magnetic because the needle was attached to the mentioned aluminum bell, and I thought I saw small magnets on the "wings" that spin in the bell. I figured the faster the wings spun the stronger the .... Wait a second, if the bell is aluminum, aluminum isn't magnetic. Whoopsy, ok toss my theory out the window. |
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| Author: | Craig [ Wed Jul 09, 2003 9:24 pm ] |
| Post subject: | |
Magnets moving near non-magnetic metal (like aluminum) does weird things.  Look at the electric meter on your house. See the aluminum wheel spinning? It is turning because of the magnetic field from the AC current in the windings in the meter.The magnet in your speedometer spinning around the aluminum disk causes drag that makes the needle move up. Check out this website about the super strong Neodymium magnets.... http://www.eskimo.com/~billb/neodemo.html It mentions some experiments you can try... See specifically MAGNETIC BRAKING ; FEEL THE DRAG DIRECTLY ; VISIBLE SLOW FALL ; and HOVERING SLOW FALL. Have fun with your magnets! |
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