1979 tach issues
Thread Starter
Cruising
Joined: Apr 2011
Posts: 12
Likes: 0
1979 tach issues
So i just got my first project vette and i finally got it running, so this is hoe my tach works when the car is off and not working it's pegged out all the way to the right in the red line, when i turn the car over it starts to drop back to the left.. but as soon as the car starts it pins back to the red line... can any one help ??? 
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
So i just got my first project vette and i finally got it running, so this is hoe my tach works when the car is off and not working it's pegged out all the way to the right in the red line, when i turn the car over it starts to drop back to the left.. but as soon as the car starts it pins back to the red line... can any one help ???
Just remove the speedo/tac cluster with the 4 screws, and reach around and disconnect the speedo cable and you in like flint....
79's RULE!!
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Here is a testing information sheet on how to remove the tach! Plus... if you look on there I have a link to a video on how to install the new board as well.
http://willcoxcorvette.com/repairand...lp.php?hID=290
Here is a detailed instruction sheet on how to replace the board.. (the video is better, but this will give you some assistance.
http://willcoxcorvette.com/repairand...lp.php?hID=252
Here is the tach board.. and yes.. I have to say it is bad.
http://willcoxcorvette.com/product_i...ducts_id=25990
Willcox
http://willcoxcorvette.com/repairand...lp.php?hID=290
Here is a detailed instruction sheet on how to replace the board.. (the video is better, but this will give you some assistance.
http://willcoxcorvette.com/repairand...lp.php?hID=252
Here is the tach board.. and yes.. I have to say it is bad.
http://willcoxcorvette.com/product_i...ducts_id=25990
Willcox
Le Mans Master
Joined: Oct 2005
Posts: 6,247
Likes: 471
From: Glen Allen, VA
Yup, youre lucky you have the dash you do, others have to pull the whole speedo-tach cluster. On 79's, the tach comes out by itself. BTW, a new tach board fixed my problems with my 79's tach, so here's another vote for a new board.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Have you all checked out the help page we did on this....
http://willcoxcorvette.com/repairand...lp.php?hID=290
http://willcoxcorvette.com/repairand...lp.php?hID=290
Thread Starter
Cruising
Joined: Apr 2011
Posts: 12
Likes: 0
Well i ordered the new board, so while in my free time i got it all taken apart and on the back of the board there is a huge black spot. so that must be the issue, I will update when i get the new one in. thanks for all the input
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Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Willcox
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Luner..
Where at? Can you post me a picture..
If it is just the white portion since you know how to adjust the limits of the tach, you can epoxy it back and touch up the white. It will change the needle weight and you'll have to re-calibrate the tach.. but there should be plenty of room to do this.
You have to be sparing with what you use. To much weight and you can't calibrate it.
Willcox
Where at? Can you post me a picture..
If it is just the white portion since you know how to adjust the limits of the tach, you can epoxy it back and touch up the white. It will change the needle weight and you'll have to re-calibrate the tach.. but there should be plenty of room to do this.
You have to be sparing with what you use. To much weight and you can't calibrate it.
Willcox
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Maybe not..
You may be able to swap the spindle part out with a speedo needle. I'm checking that for someone tomorrow. Was that you who sent me the email about this today????
Willcox
You may be able to swap the spindle part out with a speedo needle. I'm checking that for someone tomorrow. Was that you who sent me the email about this today????
Willcox
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Ok.. good.. sent you another message today.. and also sent s copy to the peeps you got the needle from.. they'll make a change I'm sure.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
I think he may be trying to preserve the originality of the car.. Not sure an autometer is what he is looking for.
