6066 (1960-1966) GMC Truck Club Bitcoin now accepted here! 
Pay Dues
Pay Dues or become a Site Supporter
 



Go Back   6066 (1960-1966) GMC Truck Club > 6066 GMC Truck Club Forum > GMC V6 and V12 Engines


GMC V6 and V12 Engines Engine repair and rebuilding

Reply
 
Thread Tools
  #1  
Old May 17th, 2017, 08:39 PM
401bluebird 401bluebird is offline
Junior Member
 
Join Date: Oct 2016
Location: Ojai California
Truck: 1960 GMC chassis 401 V6 Bluebird coach
Posts: 11
Rep Power: 9
401bluebird is on a distinguished road
Default HEI vs Pertronic pointless ignition systems

I have read most of the past postings from this site and notice that discussions on pointless ignition systems brings some criticisms of the Pertronic point replacement system.

I have a low mileage Delco point distributor in my 401 V6 and I would like to upgrade to pointless ignition. Seems a given that the GM HEI is better, but is it that much better? Like a 12" thick concrete driveway is better than a 4" thick drive, but the 4" drive should be long-lasting, too.

Anyone who has had experience with both care to comment?
Thanks,
-Andy Carlson
Reply With Quote
  #2  
Old May 18th, 2017, 03:17 PM
ilvracn's Avatar
ilvracn ilvracn is offline
-= Dues Paid =-
 
Join Date: Nov 2013
Location: atlantic iowa
Truck: 1966 gmc 1500
Age: 52
Posts: 111
Rep Power: 51
ilvracn is on a distinguished road
Default Re: HEI vs Pertronic pointless ignition systems

I have a 1960 belair, put pertronix in it 3 years ago. Runs great, no problems. I have installed pertronix in 2 customer cars, at my shop. Have had no problems with either. Pertronix is very simple, not much to go wrong.
I have an hei for my 66 gmc, have not installed it yet. Debated on the pertronix, but i needed wires, and distributor cap and rotor as well, so i opted for the hei.
Reply With Quote
  #3  
Old May 18th, 2017, 04:08 PM
TJ's GMC's Avatar
TJ's GMC TJ's GMC is offline
Senior Member
 
Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
Posts: 1,234
Rep Power: 324
TJ's GMC is on a distinguished road
Default Re: HEI vs Pertronic pointless ignition systems

Nothing wrong with pertronix other than the fact they are known for just Dying after around 5 years. I've had mine in my truck for several years and no issues or complaints here. Being that the current bolt in HEI is $325 I was able to save quite a bit of money going with a rebuilt dizzy and pertronix unit for the same results!
__________________
"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
1977 Chevy C20 572 BBC/TH400
1984 Chevy C30 292/SM465

My youtube channel aka Military Chevy:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #4  
Old May 18th, 2017, 05:34 PM
401bluebird 401bluebird is offline
Junior Member
 
Join Date: Oct 2016
Location: Ojai California
Truck: 1960 GMC chassis 401 V6 Bluebird coach
Posts: 11
Rep Power: 9
401bluebird is on a distinguished road
Default Re: HEI vs Pertronic pointless ignition systems

Thanks for the real world experience. Perhaps it may be prudent to keep a spare Pertronic unit for on the road replacement should the 1st one fail.
-Andy Carlson Ojai CA
Reply With Quote
  #5  
Old May 19th, 2017, 01:18 AM
TJ's GMC's Avatar
TJ's GMC TJ's GMC is offline
Senior Member
 
Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
Posts: 1,234
Rep Power: 324
TJ's GMC is on a distinguished road
Default Re: HEI vs Pertronic pointless ignition systems

I just keep a spare set of points on the plate and a ground wire for mine.
__________________
"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
1977 Chevy C20 572 BBC/TH400
1984 Chevy C30 292/SM465

My youtube channel aka Military Chevy:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #6  
Old May 19th, 2017, 03:06 AM
bigblockv6 bigblockv6 is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,078
Rep Power: 298
bigblockv6 is on a distinguished road
Default Re: HEI vs Pertronic pointless ignition systems

Quote:
Originally Posted by 401bluebird View Post
Thanks for the real world experience. Perhaps it may be prudent to keep a spare Pertronic unit for on the road replacement should the 1st one fail.
-Andy Carlson Ojai CA
I'll be the first to tell you about the HEI conversion, I built it back in 1991 and was immediately happy with the results. The HEI is a much hotter ignition than the Pertronix, after the 478M conversion I built it up with the MSD coil and digital module with a built in rev limiter that includes a second Tach lead which will come in real handy when I decide to go with Howell Fuel Injection. As far as reliability I just keep a spare module in the glovebox that's easier to change than a set of points.
Reply With Quote
  #7  
Old May 19th, 2017, 07:46 PM
401bluebird 401bluebird is offline
Junior Member
 
Join Date: Oct 2016
Location: Ojai California
Truck: 1960 GMC chassis 401 V6 Bluebird coach
Posts: 11
Rep Power: 9
401bluebird is on a distinguished road
Default Re: HEI vs Pertronic pointless ignition systems

I have raced at drag strips for decades, and I have learned over the years that many stock distributors have too much mechanical advance built in. In a 6000 RPM big block, it is commonly understood to have all of your advance in at 3000RPM. Timing with many stock distributors, when total timing is set up this way, will have retarded timing at low RPMS, Off-idle and slow cruise. The solution for years was to limit the total advance by brazing portions of the advance centrifugal weight slots to limit the total advance. Now, many of the aftermarket distributors come with "Performance curves" included.

My question- does having full timing come in so close to the red line leave a lot of mid-range power on the table? I would like to check the BB V6 advance curve someday on my 401 with a dial-to-zero timing light and see what the factory curves are. I suspect that they are quicker than the more traditional engines (V8s).
Thanks, -Andy Carlson Ojai CA
Reply With Quote
  #8  
Old May 20th, 2017, 04:09 AM
AZKen AZKen is online now
-= Dues Paid =-
 
Join Date: Jul 2014
Location: State48
Truck: 1960 K1001 Wideside 305 BW Custom Cab
Posts: 744
Rep Power: 0
AZKen is infamous around these partsAZKen is infamous around these parts
Default Re: HEI vs Pertronic pointless ignition systems

One thing I agree with is that Pertronix is "pointless".
Reply With Quote
  #9  
Old May 20th, 2017, 03:01 PM
TJ's GMC's Avatar
TJ's GMC TJ's GMC is offline
Senior Member
 
Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
Posts: 1,234
Rep Power: 324
TJ's GMC is on a distinguished road
Default Re: HEI vs Pertronic pointless ignition systems

Quote:
Originally Posted by bigblockv6 View Post
I'll be the first to tell you about the HEI conversion, I built it back in 1991 and was immediately happy with the results. The HEI is a much hotter ignition than the Pertronix, after the 478M conversion I built it up with the MSD coil and digital module with a built in rev limiter that includes a second Tach lead which will come in real handy when I decide to go with Howell Fuel Injection. As far as reliability I just keep a spare module in the glovebox that's easier to change than a set of points.
Pete is that the buick v6 dizzy?
__________________
"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
1977 Chevy C20 572 BBC/TH400
1984 Chevy C30 292/SM465

My youtube channel aka Military Chevy:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #10  
Old May 20th, 2017, 03:26 PM
bigblockv6 bigblockv6 is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,078
Rep Power: 298
bigblockv6 is on a distinguished road
Default Re: HEI vs Pertronic pointless ignition systems

Yes it's a Buick V6 HEI.
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Re: [6066 GMC] Pertronic/HEI Archiver Previous Forum Posts 0 February 21st, 2006 07:57 AM
Pertronic/HEI was quadrajet Archiver Previous Forum Posts 0 February 20th, 2006 03:41 AM
Re: [6066 GMC] Pertronic/HEI was quadrajet Archiver Previous Forum Posts 0 February 20th, 2006 03:03 AM
SUN Tachometers and HEI Ignition Archiver Previous Forum Posts 0 October 16th, 2005 01:46 AM
HEI Ignition for GMC V6's Archiver Previous Forum Posts 0 June 14th, 2003 01:05 AM


All times are GMT +1. The time now is 02:22 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 125|0
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.