 Troublesome Pertronix Install, something to watch out for |
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| McMark |
 Dec 31 2010, 10:23 PM
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914 Freak!  Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None  |
I rebuilt a distributor today and installed a Pertronix unit, and ran into a problem that I never had/noticed before. This was a 039xxx205A distributor and the problem was that the little 'finger' in the bottom right was running into the Pertronix mounting plate. This interference was completely eliminating any vacuum advance.
5 minutes with a file and it was all fixed. If you've got a Pertronix, this would be something to look for and should be visible simply by removing the cap and rotor and jumping in the engine bay with a flashlight. Always learn something new. (IMG:style_emoticons/default/shades.gif) Attached image(s)  
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Replies
| dr914@autoatlanta.com |
Jan 4 2011, 11:24 AM
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#2
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914 Guru Group: Members Posts: 8,095 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
WE thought that the pertronix and compufire units, when introduced for the type four distributor, were the be all end all, and in the beginning it was: Units that eliminated the messy points condenser, kept the dwell and timing steady, provided better fuel economy, easier cold starts, and smoother idle, AND would hide under the distributor cap.
What we have learned over the years is that it has a high failure rate due to the excessive heat of the air cooled engine, actually reduces the total horsepower of the engine, AND has clearance problems! I would NEVER drive my 914 on a long trip without carrying a set of points and a condenser with me. Too bad we thought that we had a solution. I have one in my Dad's 64 Riviera and it has never failed, but of course that is a water cooled engine with a BIG distributor! |
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| windforfun |
Jan 5 2011, 04:17 PM
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#3
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Senior Member Group: Members Posts: 1,967 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
QUOTE(dr914@autoatlanta.com @ Jan 4 2011, 09:24 AM)  WE thought that the pertronix and compufire units, when introduced for the type four distributor, were the be all end all, and in the beginning it was: Units that eliminated the messy points condenser, kept the dwell and timing steady, provided better fuel economy, easier cold starts, and smoother idle, AND would hide under the distributor cap. What we have learned over the years is that it has a high failure rate due to the excessive heat of the air cooled engine, actually reduces the total horsepower of the engine, AND has clearance problems! I would NEVER drive my 914 on a long trip without carrying a set of points and a condenser with me. Too bad we thought that we had a solution. I have one in my Dad's 64 Riviera and it has never failed, but of course that is a water cooled engine with a BIG distributor! Do you still sell these? |
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Posts in this topic
McMark Troublesome Pertronix Install Dec 31 2010, 10:23 PM
tradisrad I will go and check mine. I am pretty sure I have ... Dec 31 2010, 10:30 PM
realred914
I will go and check mine. I am pretty sure I have... Jan 3 2011, 11:12 PM 76-914 Thx for the tip. :trophy: Dec 31 2010, 10:39 PM silver74insocal great info! what were the symptoms that led yo... Dec 31 2010, 10:45 PM McMark Well, since this was just a distributor rebuild, I... Dec 31 2010, 11:09 PM JRust Ooh! That is mine I think :drooley:
Big shoc... Dec 31 2010, 11:24 PM detoxcowboy Nice heads up.. Dec 31 2010, 11:27 PM Cap'n Krusty Sure you bought the right Pertronix model? That ... Jan 1 2011, 12:11 AM rdauenhauer Cap'n, respect your experience but ...get over... Jan 1 2011, 04:24 AM Cap'n Krusty
Cap'n, respect your experience but ...get ove... Jan 1 2011, 11:41 AM sean_v8_914 thats one of those goofy things that could make a ... Jan 1 2011, 11:27 AM McMark 1847V for vaccuum.
1847A for non-vacuum.
I bought... Jan 1 2011, 01:10 PM Drums66 :sleep: ....Weird :evilgrin:
:sleep: :wavebye: Jan 3 2011, 06:13 PM Root_Werks Not sure what all the beef is. I had one fail on ... Jan 4 2011, 10:57 AM realred914
WE thought that the pertronix and compufire units... Jan 4 2011, 11:50 AM Rand
[quote name='dr914@autoatlanta.com' post='1413288... Jun 6 2011, 01:27 PM porschetub
[quote name='dr914@autoatlanta.com' post='141328... Aug 3 2018, 12:19 AM Als914 I guess I am one of the fortunate few who has dodg... Jan 4 2011, 12:14 PM GTeener I had 2 fail before replacing it with an MSD which... Jan 5 2011, 03:38 PM Als914
I rebuilt a distributor today and installed a Per... Jun 6 2011, 02:00 PM Crash207 I just bought and installed a "Hot Spark... Jun 8 2011, 04:52 PM ThinAir Never heard of "Hot Spark" before - do y... Jun 8 2011, 11:08 PM Derek Seymour Personally IMHO if your engine is "close... Jun 8 2011, 11:32 PM Philip W.
Never heard of "Hot Spark" before - do ... Jun 9 2011, 11:31 AM marksteinhilber
Never heard of "Hot Spark" before - do... Aug 1 2018, 11:26 PM Tbrown4x4
[quote name='Philip W.' post='1490891' date='Jun ... Aug 2 2018, 02:39 AM McMark Unless you use stock D-Jet. ;) Jun 9 2011, 12:02 AM SLITS Someday, everyone will realize that the vacuum adv... Jun 9 2011, 07:17 AM reharvey I've installed Pertonix on four of my 914s and... Jun 9 2011, 07:46 AM raynekat Had Pertronix in my 73 911 and never had a problem... Aug 1 2018, 11:37 PM 914werke Nah. sure it still on jack stands Aug 2 2018, 08:04 AM Philip W. blast from the past! - let me see if I can rec... Aug 2 2018, 09:29 AM porschetub Have had fitment issues,the Ignitor II kit I bough... Aug 2 2018, 11:51 PM |
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