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01-04-2012, 02:41 PM
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#1 |
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Frequent Flyer
Join Date: Aug 2009
Location: Tulsa, OK
Posts: 2,258
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MSD to factory tach adapter question
Has anyone hooked their factory tach to an MSD ignition box?
I've ready it requires an adapter from MSD. I currently have the MSD 6A ignition box in my truck with an aftermarket tach. I already have the factory tach in the dash and would prefer to use it since I do not like the look of the aftermarket tach. Any insight into this would be helpful. |
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01-04-2012, 02:46 PM
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#2 | |
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I built it
Join Date: Sep 2008
Location: Bakersfield ca
Posts: 744
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Re: MSD to factory tach adapter question
the factory tach works just fine in my rig with a msd. i think the adapter thing is more for the later year tachs..
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'72 k10 lwb 454, th400, 205, d44ft, 12b rear, 4in skyjacker, 35x12.5-15 superswampers, 4.56, blazer tank. painless wiring harness '98 dodge 3500 12v 5sp 4x4. the truck that actually runs Quote:
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01-04-2012, 02:50 PM
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#3 | |
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Frequent Flyer
Join Date: Aug 2009
Location: Tulsa, OK
Posts: 2,258
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Re: MSD to factory tach adapter question
Quote:
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01-05-2012, 09:28 PM
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#4 | |
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I built it
Join Date: Sep 2008
Location: Bakersfield ca
Posts: 744
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Re: MSD to factory tach adapter question
yep, box to tach
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'72 k10 lwb 454, th400, 205, d44ft, 12b rear, 4in skyjacker, 35x12.5-15 superswampers, 4.56, blazer tank. painless wiring harness '98 dodge 3500 12v 5sp 4x4. the truck that actually runs Quote:
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01-05-2012, 09:31 PM
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#5 |
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Registered User
Join Date: Jul 2011
Location: vacaville ca
Posts: 1,304
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Re: MSD to factory tach adapter question
easy!
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04 CHEVY LLY LS DURAMAX 4WD. MODS TO FOLLOW, EFI LIVE, BUILT TRANS, LBZ MP, LIFT PUMP SOLD 1972 chevy c10 |
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12-17-2023, 12:32 PM
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#6 |
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Registered User
Join Date: Dec 2022
Location: Redcliff, Alberta
Posts: 217
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Re: MSD to factory tach adapter question
Looking for a bit of clarification here.
Few guys here have said that all they did when hooking up their FACTORY dash tach to an MSD system, is hooked the factory tach coil negative wire to the grey tach wire coming out of the MSD box. Has it worked? Some have said it worked for a month, then piled up. I'm using an MSD 6-AL2 ignition box, MSD 8253 coil, and a MSD 85551 distributor. I also just added a Brother's Truck 0-8K rpm tach dash, and the only 2 wires that go to it in the supplied instructions are, power, and coil negative. The MSD grey wire is a positive, square wave signal... Please help! Thanks!
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"If it ain't broken, fix it 'till it is!" |
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12-20-2023, 01:04 AM
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#7 |
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Registered User
Join Date: Dec 2022
Location: Redcliff, Alberta
Posts: 217
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Re: MSD to factory tach adapter question
I did some more digging after I sent emails to Holley, and Brother's Truck. (Not holding my breathe for a reply)
Found this:
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"If it ain't broken, fix it 'till it is!" |
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12-24-2023, 04:17 PM
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#8 |
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Registered User
Join Date: Dec 2022
Location: Redcliff, Alberta
Posts: 217
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Re: MSD to factory tach adapter question
Dec. 24, 2023 update.
Hooked the factory GM tach wiring (brown wire) straight to the grey tach wire coming from the MSD 6AL2. It works! No adapter required. https://youtube.com/shorts/gpsXwWqjt...vgjfUsaeUBxSZc
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"If it ain't broken, fix it 'till it is!" Last edited by Extended Power; 12-24-2023 at 06:47 PM. Reason: Video attached |
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