Hei with factory 1971 tach - Chevelle Tech
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Troubleshooting Diagnosing problems done here.

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  #1  
Old Dec 27th, 12, 1:18 PM
srotn srotn is offline
Keith
 
Join Date: Jan 2006
Location: Mascoutah,IL
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Question Hei with factory 1971 tach

just went thru a sweep to ss gauge dash swap. It all worked the first time (well almost) when i powerwd it up. i have a new "american auto wire" harness through out the entire car. the quetion is, will the factory tach work with HEI. i have hooked everything up correctly, i have a complete circut from dist. to back of tach. the tach willl not work. do i have to have the tach upgraded or does it need repair?
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  #2  
Old Dec 27th, 12, 7:51 PM
1971ss454Elco 1971ss454Elco is offline
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Marc S
 
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Default Re: Hei with factory 1971 tach

I went through this same thing on my conversion

If you want, PM me your phone number and i will tell you what worked and didnt work.

Marc S
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Old Dec 28th, 12, 8:55 AM
srotn srotn is offline
Keith
 
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Default Re: Hei with factory 1971 tach

thanks marc. just sent info in a PM
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  #4  
Old Jan 1st, 13, 12:34 PM
MikeRM MikeRM is offline
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Default

I have had an original tach & a reproduction OER tach both work in my 70 with HEI just by plugging the wire to the HEI tach terminal.


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  #5  
Old Jan 1st, 13, 12:37 PM
Dean Dean is offline
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Default Re: Hei with factory 1971 tach

Same here, my 69 tach works fine plugged into the HEI tach terminal.
Although I have no idea if it is accurate or not, it seems to be.
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  #6  
Old Jan 1st, 13, 12:51 PM
vettefella vettefella is offline
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Default Re: Hei with factory 1971 tach

Quote:
Originally Posted by MikeRM View Post
I have had an original tach & a reproduction OER tach both work in my 70 with HEI just by plugging the wire to the HEI tach terminal.


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Yeah, what he said. I've done several dash and HEI conversions and have done the simple plug-in.
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Old Jan 1st, 13, 6:34 PM
srotn srotn is offline
Keith
 
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Default Re: Hei with factory 1971 tach

took it for granted the tach worked. i took it back out of car and tested it, it failed. sending it out for repairs. thanks for the help!
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