 Lets talk tachs |
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| Ductech |
 Apr 19 2011, 12:58 PM
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#1
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Member  Group: Members Posts: 356 Joined: 16-July 10 From: AridZona Member No.: 11,949 Region Association: Southwest Region  |
I just finished up my ej22 subaru swap. after drag racing a rx7 in the boonies and self destructing my shifter, i have stopped to take a look at all the little stuffs. now my tach is a little bouncy compared to a nice new digital being fed by an obd2 car computer. As the wiring i used was the original tach signal wire, im wondering if a little bit of noise is most likely the issue or if the tachs on these were never that amazing in the first place. Thanks for the your help guys.
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| SirAndy |
Apr 19 2011, 01:54 PM
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#2
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Resident German Group: Admin Posts: 41,707 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Do you still have the stock relay board?
A bouncy tach can be caused by dirty or lose connections or broken solder joints on the relay board. I had the same issue when i bought my 914-4 12 years ago. Back then you could still buy brand new relay boards, which is what i did and the bouncy tach issue went away. I'm guessing my old board had tired solder joints where they go through the relay board. There's a few nice write-ups here on how to refurbish your relay board and redo the soldering. (IMG:style_emoticons/default/popcorn[1].gif) |
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Posts in this topic
Ductech Lets talk tachs Apr 19 2011, 12:58 PM
Ductech Thanks for the reply, alas i did eliminate the rel... Apr 19 2011, 01:59 PM whatabout1 The tachs were always great but are now 30 + yrs o... Apr 19 2011, 07:46 PM Spoke Can you define bouncy? At steady RPM, is the tach ... Apr 19 2011, 07:52 PM jaxdream Spoke , you say place the 2200uF cap across the ne... Apr 20 2011, 07:27 AM
Spoke
Spoke , you say place the 2200uF cap across the n... Apr 20 2011, 09:54 AM DBCooper If you're making things more modern anyway why... Apr 20 2011, 11:12 AM chuckc
I just finished up my ej22 subaru swap. after dra... Apr 20 2011, 03:11 PM |
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