E-body rallye tach repair
#1828930
05/18/15 01:19 AM
05/18/15 01:19 AM
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Joined: Mar 2015
Posts: 23
SoCal
droptail
OP
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OP
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Joined: Mar 2015
Posts: 23
SoCal
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Hi,
Has anyone repaired the 1970 rallye tach that came in the E-body, and could you perhaps say what component failed or was replaced?
Thanks
' '70 Cuda convt - 383 bored/ported, Hemi cam, Rhoads, rollers, Mellings, MSD, 750 DP, LT dual 3", lowered, snubber, police chuck, discs, springs, sway bars, Transgo, posi, shaker, aluminum 17" rallyes w/275-285/40 EXTREMECONTACT SPORT, leather...
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Re: E-body rallye tach repair
[Re: droptail]
#1829118
05/18/15 01:06 PM
05/18/15 01:06 PM
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Joined: Jun 2008
Posts: 1,822
Colorado
denfireguy
top fuel
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top fuel
Joined: Jun 2008
Posts: 1,822
Colorado
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There are a couple of large wattage resistors that fail after one of the transistors shorts out. I have never found a schematic for the board. I just replaced the innards with the RT Engineering board. Greg the designer says it is much more accurate and I have to agree. I have a Megasquirt board running on my car and its digital tach indicator is very close to the indication on my in dash factory tach with the new board. Here is a write up on the install: http://rt-eng.com/rte/images/8/8e/RealTimeEngTach_MoparActionApril20005.pdf Craig
2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado
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Re: E-body rallye tach repair
[Re: droptail]
#1831464
05/21/15 02:43 PM
05/21/15 02:43 PM
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Joined: Mar 2015
Posts: 23
SoCal
droptail
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OP
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Joined: Mar 2015
Posts: 23
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Thanks Craig, I will give RT a call, and go through my OE PCB when I have time.
' '70 Cuda convt - 383 bored/ported, Hemi cam, Rhoads, rollers, Mellings, MSD, 750 DP, LT dual 3", lowered, snubber, police chuck, discs, springs, sway bars, Transgo, posi, shaker, aluminum 17" rallyes w/275-285/40 EXTREMECONTACT SPORT, leather...
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