!972 K20 with 5.9 Cummins Diesel and factory tach cluster - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Snork · 03-20-2016, 05:14 PM

Hi guys,

I am a first time poster, but have searched and found most info I needed by using search function.

I am the 3rd or 4th owner of a 1972 Chevy K20 pickup that has been modified and chopped up by all previous owners. I purchased the truck with the expressed purpose of putting a Cummins 12 Valve diesel in it. Speedo, oil pressure, water temp, and voltmeter all work with the Cummins, now I am looking to tackle the tach. It is a factory tach, and looks original. It worked with the V8 that I pulled, but diesels don't have the traditional coil to hook up the tach wiring.

My question is: Can I use a tach sending unit that is available from Summit and mount it to read off the crank shaft? I know the tach has a ground, 12v, and wire for a coil. Not sure if this tach needs a special power or signal input

matt_field · 03-20-2016, 05:24 PM

Would also like to use a factory tach with my cummins. Anyone know what we need? I see your in Minnesota also !

Matt

**71blksuper4x4** · 03-20-2016, 06:07 PM

You could use the factory diesel tach dash....that I know can be hooked to the Cummins.

03-20-2016, 05:14 PM	#1
Snork Registered User Join Date: Nov 2013 Location: MN Posts: 2	!972 K20 with 5.9 Cummins Diesel and factory tach cluster Hi guys, I am a first time poster, but have searched and found most info I needed by using search function. I am the 3rd or 4th owner of a 1972 Chevy K20 pickup that has been modified and chopped up by all previous owners. I purchased the truck with the expressed purpose of putting a Cummins 12 Valve diesel in it. Speedo, oil pressure, water temp, and voltmeter all work with the Cummins, now I am looking to tackle the tach. It is a factory tach, and looks original. It worked with the V8 that I pulled, but diesels don't have the traditional coil to hook up the tach wiring. My question is: Can I use a tach sending unit that is available from Summit and mount it to read off the crank shaft? I know the tach has a ground, 12v, and wire for a coil. Not sure if this tach needs a special power or signal input

03-20-2016, 05:24 PM	#2
matt_field Registered User Join Date: Apr 2001 Location: Detroit Lakes, Minnesota Posts: 885	Re: !972 K20 with 5.9 Cummins Diesel and factory tach cluster Would also like to use a factory tach with my cummins. Anyone know what we need? I see your in Minnesota also ! Matt __________________ 1971 k5 blazer 80k mike survivor 1972 3/4 ton 4wd Cummins 12v 1967 swb 2wd 427bbc 1968 4wd shortbox 1971 Cheyenne swb k10 unrestored 1971 Cheyenne super 40k 402bb survivor 1967 Chevy k10 (first truck) 1968 L78 camaro survivor 18k miles 1969 z28 survivor 60k miles 1969 z28 survivor 39k miles 1969 z28 rs survivor 80k miles

03-20-2016, 06:07 PM	#3
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,156	Re: !972 K20 with 5.9 Cummins Diesel and factory tach cluster You could use the factory diesel tach dash....that I know can be hooked to the Cummins. Attached Images __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

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