Bouncy Tach, ...I tried the fix |
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Bouncy Tach, ...I tried the fix |
yeahmag |
Apr 28 2010, 11:04 AM
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#1
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Advanced Member Group: Members Posts: 2,422 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
So once I got my 2056cc built the tach could no longer keep up and just flailed around worthlessly... Especially when running an autocross. So I finally got around to trying the 2200uF trick and now it's over damped... Sigh. Maybe I'll try a different variant of capacitor and see what happens.
Anybody else have a recommended type of capacitor for the application: http://en.wikipedia.org/wiki/Types_of_capacitor |
BIGKAT_83 |
Apr 28 2010, 01:52 PM
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#2
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Senior Member Group: Members Posts: 1,798 Joined: 25-January 03 From: Way down south Bogart,GA Member No.: 194 Region Association: South East States |
The Tach is dampend with a pin coming off of the meter movement that rides in a small amount of grease or silicone. After time this dries and no longer functions.
I have cleaned the old grease out and used vasoline to replace it. It works great the trick is getting the right amount and put in the right place. I had done a write up on the old Yahoo porsche chevy group on how to do this and recalibrate the tachs for a V8 or 6cyl. With that being said I really think the best thing to do is shit can the 35 year old tach and get one from BIGMARK with up to date movements (IMG:style_emoticons/default/biggrin.gif) Bob |
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