C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

1970 tachometer conversion

Thread Tools
 
Search this Thread
 
Old Aug 22, 2011 | 12:48 AM
  #1  
ratical12001's Avatar
ratical12001
Thread Starter
Intermediate
 
Joined: Dec 2009
Posts: 45
Likes: 0
From: garden city kansas
Default 1970 tachometer conversion

I was just looking through motorworks catalog, and i saw that they have is a 1975 tachometer repair kit. says use your own needle and face. will this work to convert my 1970 over to electrical tach. Has any one else seen this ?
Reply
Old Aug 22, 2011 | 02:01 AM
  #2  
StingrayLust's Avatar
StingrayLust
Burning Brakes
10 Year Member
 
Joined: Feb 2011
Posts: 850
Likes: 12
From: Shakopee MN
Default

Check out my 2 threads about this process as I converted my '71 mechanical to an HEI electronic tach here and here.

Hopefully it may help if you decide to do it yourself. Also, don't forget to buy a tach filter. I bought my new board from Willcox and it's been working great after my conversion.
Reply
Old Aug 22, 2011 | 06:35 PM
  #3  
72LS1Vette's Avatar
72LS1Vette
Safety Car
20 Year Member
 
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
Default

Originally Posted by ratical12001
I was just looking through motorworks catalog, and i saw that they have is a 1975 tachometer repair kit. says use your own needle and face. will this work to convert my 1970 over to electrical tach. Has any one else seen this ?
If it's the 602-779 kit that I just looked up, then no, it won't work. The kit just includes the circuit board. You have to get the tach needle driver also, which is the small can-shaped object in their picture. The best way to convert your tach is to buy a 75-up tach and swap your tach face onto it. The needles are also counter-wieghted differently so you have to use an electric tach needle.



Rick B.
Reply
Old Aug 22, 2011 | 08:50 PM
  #4  
Willcox Corvette's Avatar
0Willcox Corvette
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
Default

Originally Posted by 72LS1Vette
If it's the 602-779 kit that I just looked up, then no, it won't work. The kit just includes the circuit board. You have to get the tach needle driver also, which is the small can-shaped object in their picture. The best way to convert your tach is to buy a 75-up tach and swap your tach face onto it. The needles are also counter-wieghted differently so you have to use an electric tach needle.



Rick B.
Reply
Old Aug 22, 2011 | 10:33 PM
  #5  
sly vette's Avatar
sly vette
Safety Car
 
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
Default

Why are you abandoning the mechanical tach?
Reply
Old Aug 23, 2011 | 06:27 AM
  #6  
KanuckZ06's Avatar
KanuckZ06
Instructor
 
Joined: Oct 2009
Posts: 180
Likes: 0
From: Lakefield Ontario
Default

Sly-Vette
If you want to convert to a Fuel Injection system like FAST, they require that you use a different distributor, they don't have a mechanical tach drive.
Reply

Get notified of new replies

To 1970 tachometer conversion





All times are GMT -4. The time now is 02:47 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE