1970 bb tach problem
Thread Starter
Instructor
Joined: Jul 2015
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From: pa
1970 bb tach problem
I am a newbie to the forum and just purchased a 1970 454 that has had the distributor changed out. I could not figure out why the tach was not working until I noticed the cable just hanging in the engine compartment. The distributor has a electric clip lead labeled tach. Is there a mechanical to electric component that connect to the tach cable that can be connected to the distributor. What I am reading on the interweb is that the tach electronic board needs to be changed out. Is this the best way or is there another approach??
thanks
steve
thanks
steve
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,333
From: North of Toronto - Ontario
I am a newbie to the forum and just purchased a 1970 454 that has had the distributor changed out. I could not figure out why the tach was not working until I noticed the cable just hanging in the engine compartment. The distributor has a electric clip lead labeled tach. Is there a mechanical to electric component that connect to the tach cable that can be connected to the distributor. What I am reading on the interweb is that the tach electronic board needs to be changed out. Is this the best way or is there another approach??
thanks
steve
thanks
steve
Looks like someone updated your distributor to a newer one (is it an HEI by chance?)
You need to either downdate the distributor or update the tach.
M
Tech Contributor
Joined: Aug 1999
Posts: 14,356
Likes: 6,328
From: At my Bar drinking and wrenching in Lafayette Colorado
I am a newbie to the forum and just purchased a 1970 454 that has had the distributor changed out. I could not figure out why the tach was not working until I noticed the cable just hanging in the engine compartment. The distributor has a electric clip lead labeled tach. Is there a mechanical to electric component that connect to the tach cable that can be connected to the distributor. What I am reading on the interweb is that the tach electronic board needs to be changed out. Is this the best way or is there another approach??
thanks
steve
thanks
steve
Lars
Former Vendor
Joined: Aug 2006
Posts: 76,656
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
I am a newbie to the forum and just purchased a 1970 454 that has had the distributor changed out. I could not figure out why the tach was not working until I noticed the cable just hanging in the engine compartment. The distributor has a electric clip lead labeled tach. Is there a mechanical to electric component that connect to the tach cable that can be connected to the distributor. What I am reading on the interweb is that the tach electronic board needs to be changed out. Is this the best way or is there another approach??
thanks
steve
thanks
steve
-Willcox
Thread Starter
Instructor
Joined: Jul 2015
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From: pa
Race Director
Joined: May 2006
Posts: 18,604
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here is an example of an HEI distributor with tach drive, you dont need a separate coil for this one.
http://www.summitracing.com/parts/su...model/corvette
or from one of the participating vendors
https://willcoxcorvette.com/corvette...i-w-tach-drive
http://www.summitracing.com/parts/su...model/corvette
or from one of the participating vendors
https://willcoxcorvette.com/corvette...i-w-tach-drive
Last edited by MelWff; Feb 9, 2016 at 03:16 PM.
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https://willcoxcorvette.com/corvette...i-w-tach-drive
Former Vendor
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Willcox
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From: pa
thx
ssteve