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05-28-2020, 10:43 PM
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#1 |
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Enjoy your truck
Join Date: Oct 2007
Location: Newmarket, Ontario, Canada
Posts: 1,066
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'63 tach issue
I just replaced the stock points distributor, including Accel Super Coil w/ ballast resistor, with and Edelbrock Max Fire distributor, coil, and wires. The 327 runs great with this system but I have noticed the tach, which is a stock Sun in-dash unit, is not showing the rpm's correctly now. It appears to be low by several hundred rpm's all through the range, including idle.
Any ideas what is causing this and what the remedy may be? Could it be the ballast resistor no longer involved in the system?
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1 Corinthians 10:13 1963 Chevrolet 1/2 ton 2010 Camaro SS/RS 2014 Jeep Grand Cherokee 2016 Jeep Cherokee |
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06-01-2020, 02:44 PM
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#2 |
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Enjoy your truck
Join Date: Oct 2007
Location: Newmarket, Ontario, Canada
Posts: 1,066
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Re: '63 tach issue
I just went out for another drive and noticed this - the engine runs great but the tach seems "lazy". The needle moves but not at the rate it should. I also observed that the needle "bounces" at 3000rpm (gets to 3000 and drops, then back up to 3000 - like a rev limiter) even as I know I am revving past that.
Any ideas anyone?
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1 Corinthians 10:13 1963 Chevrolet 1/2 ton 2010 Camaro SS/RS 2014 Jeep Grand Cherokee 2016 Jeep Cherokee |
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06-01-2020, 02:58 PM
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#3 |
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Moderator
  
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: '63 tach issue
Stock Tach with an HEI "type" distributor right?
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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06-01-2020, 03:23 PM
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#4 | |
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Enjoy your truck
Join Date: Oct 2007
Location: Newmarket, Ontario, Canada
Posts: 1,066
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Re: '63 tach issue
Quote:
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1 Corinthians 10:13 1963 Chevrolet 1/2 ton 2010 Camaro SS/RS 2014 Jeep Grand Cherokee 2016 Jeep Cherokee |
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06-02-2020, 05:25 AM
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#5 |
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Enjoy your truck
Join Date: Oct 2007
Location: Newmarket, Ontario, Canada
Posts: 1,066
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Re: '63 tach issue
Is there a solution that is known to correct this? Will a tach signal filter sort it out?
__________________
1 Corinthians 10:13 1963 Chevrolet 1/2 ton 2010 Camaro SS/RS 2014 Jeep Grand Cherokee 2016 Jeep Cherokee |
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06-02-2020, 07:29 AM
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#6 | |
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Moderator
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: '63 tach issue
Quote:
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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06-13-2020, 07:38 PM
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#7 |
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Enjoy your truck
Join Date: Oct 2007
Location: Newmarket, Ontario, Canada
Posts: 1,066
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Re: '63 tach issue
Any other ideas, anyone?
I bought and installed a tach filter from Glowshift and it didnt work. In fact with it wired in according to the diagram they supplied my tach didnt work at all.
__________________
1 Corinthians 10:13 1963 Chevrolet 1/2 ton 2010 Camaro SS/RS 2014 Jeep Grand Cherokee 2016 Jeep Cherokee |
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06-22-2020, 08:55 PM
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#8 |
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Enjoy your truck
Join Date: Oct 2007
Location: Newmarket, Ontario, Canada
Posts: 1,066
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Re: '63 tach issue
No other suggestions?
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1 Corinthians 10:13 1963 Chevrolet 1/2 ton 2010 Camaro SS/RS 2014 Jeep Grand Cherokee 2016 Jeep Cherokee |
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