460 tack

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Dec 12, 2003 | 07:42 PM

stuperscout

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460 tack

I am currently doing a 460 swamp into a 88 f-250. I removed a 300 6 cyclinder. and would like to know if the tack will work for the 460 or is it switchable for the 460.

Dec 13, 2003 | 07:50 PM

georgedavila

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From: Nevada

Can't answer your question, but somebody on the electrical forum should be able to help.

https://www.ford-trucks.com/forums/f...?s=&forumid=62

Dec 13, 2003 | 08:19 PM

airharley

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From: Escondido, CA

The tach will work with the 460. I found that out by just hooking up one a bunch of years back. It runs off of the coil/distributor signal. 4-12 cylinders all use the same signal.

Dec 14, 2003 | 01:22 AM

drunkenmonk

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From: northern ca

HUH?

it may work, but I doubt it would be right
its triggered by the coil primary
on a V8 the coil fires 4 times per crank revolution
on a six it fires 3 times per revolution
there may be a switch or something to convert it

Dec 14, 2003 | 08:44 AM

georgedavila

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From: Nevada

Aftermarket tachs have that switch, I'm not familiar with factory tachs.

Dec 14, 2003 | 04:11 PM

82F100SWB

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From: Dryden, ON, Canada

The factory tachs have an extra terminal that is grounded thorugh the engine harness in a V8 application.
I'm not sure where this is found on an 87-up however.

Dec 14, 2003 | 05:20 PM

PsRumors

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From: Cartersville, GA

If your keeping an ECM it will work. The tack is controlled by the ECM which is matched to the motor. The ECM will send the appropriate signal to the tach, not the coil.