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Old 06-09-2004, 07:02 PM   #1
Deuce
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Difference between 8cyl and 6cyl factory tach??

The factory tach I just bought has 8cyl stamped on the back of the housing. Will it read correctly on a 292 6cyl??
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Old 06-09-2004, 07:32 PM   #2
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no it will not
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Old 06-09-2004, 09:31 PM   #3
'68OrangeSunshine
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Aftermarket tachs have a slide switch on the back: 6 Cyl or 8 Cyl; or 4-6-8, depending.
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Old 06-09-2004, 10:44 PM   #4
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The 6 cyl tach will count 6 fires of the coil and think the rotor has completed one revolution then there is 2 to go.
you will need a 6 cyl tach if you want to keep it factory
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Old 06-11-2004, 09:47 PM   #5
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See if you can dial it in to the correct rpm using the set up screw inside the tach head ... pictures shows a hole.. yours may still have a sticker covering it. Just get another tach meter that reads correctly to dial it in.

I just put tach cluster on the rad cradle.. hook a set of tach wires to it and ground the cluster to the chassis. Run the truck, set the rpm, then install correctly.
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Old 06-14-2004, 01:07 PM   #6
Deuce
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Quote:
Originally Posted by Rod
See if you can dial it in to the correct rpm using the set up screw inside the tach head ... pictures shows a hole.. yours may still have a sticker covering it. Just get another tach meter that reads correctly to dial it in.

I just put tach cluster on the rad cradle.. hook a set of tach wires to it and ground the cluster to the chassis. Run the truck, set the rpm, then install correctly.
Thank-You. I was wondering what the dial on the tach electronics was for
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Old 06-14-2004, 07:50 PM   #7
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Deuce,

I had PM'd you the instructions back on 6-10-04 in regards to the tach. It looks like you have not read the PM yet.

Jim
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