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Tachometer reads too high #2372234
09/17/17 03:08 PM
09/17/17 03:08 PM
Joined: Dec 2004
Posts: 733
Northern Virginia
Moparmaniacc Offline OP
super stock
Moparmaniacc  Offline OP
super stock

Joined: Dec 2004
Posts: 733
Northern Virginia
The stock tach on my Rallye dash 440 Challenger reads too high, at least 1000 rpm, it seems to be just at the higher rpms.
The speedo seems pretty accurate..3.23 gears.
What could be wrong?

Last edited by Moparmaniacc; 09/17/17 03:37 PM.
Re: Tachometer reads too high [Re: Moparmaniacc] #2372286
09/17/17 05:27 PM
09/17/17 05:27 PM
Joined: Jan 2003
Posts: 25,757
Rio Linda, CA
John_Kunkel Offline
Too Many Posts
John_Kunkel  Offline
Too Many Posts

Joined: Jan 2003
Posts: 25,757
Rio Linda, CA

I've never seen a factory tach that didn't read high. What type of ignition are you running, anything but original makes it worse.

Consider upgrading the tach with modern electronics.

http://www.tachman.com/mopar.htm


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Re: Tachometer reads too high [Re: Moparmaniacc] #2372290
09/17/17 05:40 PM
09/17/17 05:40 PM
Joined: Dec 2003
Posts: 36,840
South San Francisco, Californi...
MidPenMopar Offline
Looking for fun? Keep looking
MidPenMopar  Offline
Looking for fun? Keep looking

Joined: Dec 2003
Posts: 36,840
South San Francisco, Californi...
My in dash tach reads about 100 to 200 RPM more than it should be too.

Re: Tachometer reads too high [Re: Moparmaniacc] #2372309
09/17/17 06:15 PM
09/17/17 06:15 PM
Joined: May 2005
Posts: 4,713
Florida
BDW Offline
master
BDW  Offline
master

Joined: May 2005
Posts: 4,713
Florida
Whatever you do, DO NOT use tachman,
By far the worst auto experience I've ever had!

Re: Tachometer reads too high [Re: Moparmaniacc] #2372311
09/17/17 06:25 PM
09/17/17 06:25 PM
Joined: Feb 2012
Posts: 4,452
Morristown Tn.
7
71birdJ68 Offline
master
71birdJ68  Offline
master
7

Joined: Feb 2012
Posts: 4,452
Morristown Tn.
RT engineering also has a modern tach board.

Re: Tachometer reads too high [Re: Moparmaniacc] #2372318
09/17/17 06:40 PM
09/17/17 06:40 PM
Joined: Dec 2004
Posts: 733
Northern Virginia
Moparmaniacc Offline OP
super stock
Moparmaniacc  Offline OP
super stock

Joined: Dec 2004
Posts: 733
Northern Virginia
Thanks guys, I'll check them out!







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