C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Delteq and SHift Light?

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Old Jun 1, 2005 | 02:54 AM
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steve40th
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Default Delteq and SHift Light?

Where do I get an input from my DELTEQ to let my MSD tach light work. I used the MSD box, but when my Delteq gets here, the MSD wont stay on and the MSD is where I had my input for the tach light.
Mines a 93 LT1, and tach filter is already bypassed.
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Old Jun 1, 2005 | 03:02 AM
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Alvin
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Originally Posted by steve40th
Where do I get an input from my DELTEQ to let my MSD tach light work. I used the MSD box, but when my Delteq gets here, the MSD wont stay on and the MSD is where I had my input for the tach light.
Mines a 93 LT1, and tach filter is already bypassed.
The tach out from the computer will work. I don't remeber what pinout it is off the top of my head.
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Old Jun 1, 2005 | 06:49 AM
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Tom Piper
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Originally Posted by steve40th
Where do I get an input from my DELTEQ to let my MSD tach light work. I used the MSD box, but when my Delteq gets here, the MSD wont stay on and the MSD is where I had my input for the tach light.
Mines a 93 LT1, and tach filter is already bypassed.
If you had a '96 (and maybe a 95, but I'm not sure about the '95) the tach output is directly from the ECM.

Since you have a '93, the Tach output from the Delteq is pin D of connector B on the Delteq box.
Go to this site and look at figure 9 on page 15:

http://www.delteq.com/Rev5c_Vette.pdf



Tom Piper

Last edited by Tom Piper; Jun 1, 2005 at 07:13 AM.
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Old Jun 1, 2005 | 12:31 PM
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steve40th
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Thanks, I think it will work. Also, the white wires going to the tach filter are currently cut, do I need to resoder them, as they were cut for the MSD ignition to allow the tach to work properly.
I know the DELTEQ requires the tach filter to be bypassed, which means to me, it is no longer needed, and they have been cut for about 7 years.
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