 Tachometer rebuild |
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| totle |
 Sep 13 2018, 06:27 AM
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#1
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Newbie  Group: Members Posts: 44 Joined: 18-October 10 From: Norway Member No.: 12,280 Region Association: Europe  |
Hi,
Anyone that have a DIY description of how to rebuild a 7k Tach to a 10k Tach ? and from 4 cyl to 6. I would think that there is someone who has done this. Any potmeter adjustments, og parts that needs to be replaced ? I know that NHS does this, but would be nice to do it and just buy a new faceplate |
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| PlaysWithCars |
Sep 15 2018, 09:57 AM
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#2
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Senior Member Group: Members Posts: 539 Joined: 9-November 03 From: Southeast of Seattle Member No.: 1,323 Region Association: Pacific Northwest 
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Tach bounce. Now there is something that I would like a DIY solution for. I like the tach scale I have, the tach matches the # cylinders in the engine, but the lazy tach needle and bounce can't keep up with the changes in engine speed. Especially with a lightened flywheel.
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| nickg |
Sep 17 2018, 04:42 PM
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#3
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Senior Member Group: Members Posts: 501 Joined: 30-August 04 From: franklin, nj Member No.: 2,652 |
QUOTE(PlaysWithCars @ Sep 15 2018, 07:57 AM)  Tach bounce. Now there is something that I would like a DIY solution for. I like the tach scale I have, the tach matches the # cylinders in the engine, but the lazy tach needle and bounce can't keep up with the changes in engine speed. I would like to know how to fix the bounce too |
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| Spoke |
Sep 18 2018, 05:22 AM
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#4
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Jerry Group: Members Posts: 7,348 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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QUOTE(nickg @ Sep 17 2018, 06:42 PM) QUOTE(PlaysWithCars @ Sep 15 2018, 07:57 AM) Tach bounce. Now there is something that I would like a DIY solution for. I like the tach scale I have, the tach matches the # cylinders in the engine, but the lazy tach needle and bounce can't keep up with the changes in engine speed. I would like to know how to fix the bounce too Here's a simple way to dampen later (73+) tachs by adding a single capacitor of value 1800-2200uF across the windings of the needle. I've done this on a couple of tachs. Works well and simple to install. Maybe not the best or elegant solution but works well as the clips below show the difference between original and dampened operation. The early tachs internally are different and I didn't spend much time trying to figure a simple way to dampen it.  BEFORE: https://www.youtube.com/watch?v=VCgLzBJxoEM AFTER: https://www.youtube.com/watch?v=VFTXRVlUuyg |
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Posts in this topic
totle Tachometer rebuild Sep 13 2018, 06:27 AM
timothy_nd28 I have toyed with the idea of doing just this, but... Sep 13 2018, 06:51 AM timothy_nd28 Trond from Norway has pointed out to me that these... Sep 13 2018, 08:31 AM peteyd I would be interested in this.
Could you perhaps ... Sep 13 2018, 11:00 AM timothy_nd28 The tach drive that I spec'd out in my DIY thr... Sep 13 2018, 11:26 AM totle Thanks for sharing the information Timothy
Great D... Sep 13 2018, 04:13 PM mepstein I forgot I have a 10K tach. :D Sep 14 2018, 05:56 PM Mark Henry An Ashlock tachadapt will turn a /4 tach into a /6... Sep 14 2018, 06:29 PM porschetub Howard Instruments in Victoria ,Australia do a 10K... Sep 15 2018, 03:15 PM timothy_nd28 The Ashlock tach-adapt is the wrong product for wh... Sep 17 2018, 08:59 AM
Retroracer "can you convert a stock 914 tachometer to a ... Sep 17 2018, 12:33 PM mepstein Only problem I see with a 10k tach face on a 4 is ... Sep 17 2018, 12:47 PM Retroracer
Only problem I see with a 10k tach face on a 4 is... Sep 17 2018, 01:43 PM timothy_nd28 Mark brings up a good point. Not many engines rev... Sep 17 2018, 01:29 PM Spoke Can a 911 tach be substituted? Don't know if t... Sep 17 2018, 01:29 PM timothy_nd28 911 and 914 tach sizes are identical Sep 17 2018, 01:31 PM mepstein These just showed up today. I always wanted a set ... Sep 17 2018, 02:25 PM jrblackbox
These just showed up today. I always wanted a set... Sep 17 2018, 03:42 PM mepstein
These just showed up today. I always wanted a se... Sep 17 2018, 08:38 PM Larmo63 I don't get the 'need' for a 10,000 RP... Sep 17 2018, 11:33 PM totle Great looking cars Lawrence :-)
10k is not needed... Sep 18 2018, 03:27 AM 914forme You all make me :rotfl: I tried to stay out of th... Sep 18 2018, 07:27 AM timothy_nd28 Sounds like Stephen is all in with this project, w... Sep 18 2018, 09:06 AM 914forme Yes you use an opaque poly sheet with a matte blac... Sep 18 2018, 06:32 PM timothy_nd28 I was totally kidding, this project is cool but no... Sep 18 2018, 07:44 PM stownsen914 I didn't read through the whole thread, but in... Sep 18 2018, 08:11 PM mepstein
I didn't read through the whole thread, but i... Sep 18 2018, 08:41 PM 914forme I just picked up a bunch of various tacos to give ... Sep 18 2018, 07:57 PM 914forme Maybe it is not hard to draw up with a vector soft... Sep 18 2018, 08:22 PM mepstein
Maybe it is not hard to draw up with a vector sof... Sep 18 2018, 08:42 PM 914forme It is also not clocked, which I prefer to do on a ... Sep 18 2018, 08:25 PM 914forme Never knew that, thanks Mark Sep 19 2018, 06:10 AM mepstein
Never knew that, thanks Mark
Now the tach on the... Sep 19 2018, 06:28 AM 914forme Duplicate Post Sep 19 2018, 06:10 AM mepstein 10k tach for sale on the bird.
http://forums.pel... Sep 22 2018, 11:04 AM |
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