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#1 |
Cluster King
![]() Join Date: Nov 2012
Location: Junction City, OR
Posts: 5,263
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Pertronix users question
Hello all,
Any of you out there running Pertronix with stock tachs? Sold a 6 cyl factory tach to a customer and he is concerned as well as myself as if there an issue. I think the pulse to negative side of coil should be the same??? Thank you I’m advance for any knowledge for this. Take care, Tom
__________________
Contact me on all of your gauge cluster needs. I specialize in restoration, repair and parts sales for 67-72 Chevy and GMC trucks. email me at tbonegarris@yahoo.com I am also a dealer for Counterpart for gauge cluster parts only. Also see my facebook page, CG&C |
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#2 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,276
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Re: Pertronix users question
I had a Pertronix Ignitor II on the L6 292 In my '68 C/10 Stepside. I run an AutoMeter aftermarket tach. I never had a tach problem.
My buddy has a BBF 429 in a '72 F-250 longbed. He installed the Ignitor III. His tach wouldn't work. He called their Tech Rep. The guy said, if you want a tach go back to an Ignitor II. Or run a mechanical tach. Ignitor 3 is some kind of multi-spark discharge, like an MSD. The issue I had with Pertronix is that it burned out after 7 years. Ignition would kill above 3500 RPM -- usually on the freeway -- with the engine cold cranking in gear at 65 MPH --On/Off with the key and it would pop start at 55 MPH -- usually p!ssing off the guy behind you. I called the tech line. They said to send the module in. I did, and never heard back from them. I went back to points for a year, then got GM type HEI. I now run a regular HEI. Again no problems with my aftermarket tach.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#3 |
Registered User
Join Date: Jan 2017
Location: Mason City, IA
Posts: 157
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Re: Pertronix users question
Hey Tom, I have a pertronix II on my 350. I'm using the negative terminal on the coil to feed the tach on my efi controller, works great!
Jim |
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#4 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: Pertronix users question
I have several. No problem.
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#5 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Pertronix users question
I have mine in for years with no issues - 402BB
__________________
A husband can be right...or...A husband can be happy. ![]() 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. ![]() 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc ![]() ![]() JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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#6 |
70+ ( Old Skool Club )
![]() Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,119
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Re: Pertronix users question
I have an Igniter11 and their matching coil on my 350. and my tach works but is always 5/700 RPMs higher than it should be for a given speed. I called Petronix and they told me to get a certain resistor which I did and put it in the line and nothing changed. I sure would like to get the tach working as it should or at least within 200 or so RPMs of where it should be.
__________________
1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#7 | |
Registered User
Join Date: Jul 2015
Location: Lindenwold, NJ
Posts: 94
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Re: Pertronix users question
Quote:
would lower your rpm reading to the correct range maybe a coil/capacitor in parallel before the tachometer |
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#8 | |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: Pertronix users question
Quote:
__________________
other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#9 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,722
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Re: Pertronix users question
Is there an adjustment?
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#10 |
Senior Member
![]() Join Date: Aug 2013
Location: Grand Island, NE
Posts: 1,483
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Re: Pertronix users question
I tested my setup yesterday and my tach stayed around 700 RPM at all times. I don’t remember if I have the igniter or igniter II. I didn’t have time to mess with it any ideas what could be causing it?
__________________
1949 Chevy 3100 Five Window 1964 Chevy C10 Lambrecht Auction project 1967 Chevy SWB K10 1967 GMC K15 Project Build thread- http://67-72chevytrucks.com/vboard/s...72#post6502772 1968 Chevy Anniversary K10 1991 K5 4" Lift 35's (the wife's toy) |
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#11 | |
Cluster King
![]() Join Date: Nov 2012
Location: Junction City, OR
Posts: 5,263
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Quote:
Posted via Mobile Device |
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#12 |
Senior Member
![]() Join Date: Aug 2013
Location: Grand Island, NE
Posts: 1,483
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Re: Pertronix users question
It resets to zero when I turn the key off. I didn’t mess with it too much because I don’t have an exhaust yet but it’s being installed tomorrow so I should be able to look into it further then.
__________________
1949 Chevy 3100 Five Window 1964 Chevy C10 Lambrecht Auction project 1967 Chevy SWB K10 1967 GMC K15 Project Build thread- http://67-72chevytrucks.com/vboard/s...72#post6502772 1968 Chevy Anniversary K10 1991 K5 4" Lift 35's (the wife's toy) |
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