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01-27-2007, 11:22 AM | #1 |
Senior Member
Join Date: Jul 2005
Location: Winters Ca. 95694
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Factory tach with new HEI questions!
Ok this should be real simple but I am hoping I just am missing somthing. I just put a stock cluster out of a c50 or better into my 70 Low buck truck build and I also put in a new HEI. I have 12volts acc power to the B+ wire on the tach and the other end is conected to the tach lead of the HEI. I fired it up and nothing Is their a test other then what I did to see if the tach works? I would really like to keep the stock one if I can but!!!
Kevin LFD Inc. |
01-27-2007, 11:39 AM | #2 |
Roadtrip!
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Re: Factory tach with new HEI questions!
Do you have the cluster grounded?
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01-27-2007, 11:48 AM | #3 |
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Re: Factory tach with new HEI questions!
I do not have any extra ground wires than what comes on the cluster. Or do you mean the tach cluster it self?
**Ok now I just went out and fired it up and the tach kind of is working but it shows that my motor idlles at 500 and it will not rev past 7-800? Any ideas on this one. It was late last night when I fired it up so I shut it off quick and did not notice thy movement but now I do just not enough.** Kevin LFD Inc. Last edited by Rokcrln; 01-27-2007 at 12:00 PM. |
01-27-2007, 11:51 AM | #4 | |||
Union Electrician
Join Date: Feb 2005
Location: Louisville, Ky.
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Re: Factory tach with new HEI questions!
DEAD TACH!!! The ground could matter, but I do not have mine grounded and don't have any of the dashes I restored grounded when testing tachs and have never had any issues.
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01-27-2007, 11:51 AM | #5 | |||
Union Electrician
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Location: Louisville, Ky.
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Re: Factory tach with new HEI questions!
Some the dashes had a small jumper form the rear tin to the cab for ground
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69 Custom-10 SWB FLEETSIDE 350/350 TH Dropped 3.5/5.5" Help support the board->HERE Board vendors -> Vendors list Zip:40272 Big Sandy Survivor... Quote:
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01-27-2007, 01:18 PM | #6 |
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Location: WI,USA
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Re: Factory tach with new HEI questions!
A shot in the dark,But maybe it's a 6 cyl tach?
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69 Lwb C-10 402/700R4 70 Lwb C-10 250/3pd Wisc. |
01-27-2007, 11:33 PM | #7 |
Registered User
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Location: North Louisiana
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Re: Factory tach with new HEI questions!
To me it sounds like the needle may be sticking or rubbing the tach face, stopping it at 7-800. Did you happen to check to see if the needle would bounce back and forth before you installed it?
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Wynne 70 CST short fleet Hugger orange & white, 350/350, ps, pb, air, tilt, tach/vac/speedwarning, original buckets, AM/FM, oak bed floor, shoulder belts, 3.5"/5.5" drop, 20" American Racing VN425s. Build thread 53 Chevy shortbed 69 Camaro Click here to subscribe Chevy GMC International Truck Club Louisiana Charter Member http://www.louisianaclassictruckclub.com |
01-28-2007, 12:32 AM | #8 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: Factory tach with new HEI questions!
i've seen a few bum tachs di this.
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01-28-2007, 01:20 AM | #9 |
Senior Member
Join Date: Jul 2005
Location: Winters Ca. 95694
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Re: Factory tach with new HEI questions!
No I did not check it before but I will pull it out before I finish putting it all back together!
Kevin LFD Inc. |
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