Spark plugs - Pontiac GTO Forum

User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 09-07-2011, 07:48 AM Thread Starter
 
Join Date: May 2011
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Spark plugs

HI, I have a 1970 pontiac lemans v8. I just upgraded the ignition with Pertronix ignition components. The correct factory plugs for the car is AC R45S gapped at .035. What would be the best plug to use now with the new Pertronix system in as well as what gap should I use? I have some R45TSX plugs although unsure if this would be correct to use or not. thanks
albatross is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 09-07-2011, 09:16 AM
Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,916
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Unless you go with an HEI or MSD ignition, keep the same plugs and gap.
Rukee is offline  
post #3 of 11 (permalink) Old 09-07-2011, 10:56 AM Thread Starter
 
Join Date: May 2011
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
spark plugs

yes my 1970 Lemans has been updated to an Summit 850007 distributer system. I recently added Pertronix flamethrower cap, rotor, ignition coil and modulator. Sorry, I should have mentioned that.
albatross is offline  
post #4 of 11 (permalink) Old 09-07-2011, 11:22 AM
Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,916
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Then you can up the gap to 0.045" paying attention to how it drives.
Rukee is offline  
post #5 of 11 (permalink) Old 09-08-2011, 07:52 AM
 
Join Date: Feb 2011
Location: Des Moines, IA
Posts: 662
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Know that the R45TSX is longer than the R45S... 2mm I think.

Matthew is offline  
post #6 of 11 (permalink) Old 09-08-2011, 05:31 PM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 7,905
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Yeah, stick with the R45S plugs. No real advantage to a wide gap in these engines.
geeteeohguy is offline  
post #7 of 11 (permalink) Old 09-12-2011, 10:02 AM
 
Join Date: Jul 2008
Location: Aberdeen ms.
Posts: 405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
my 66 326 has acr45s gaped at 35 now, first plugs i tryed were champion and they done good but had made in mexico on theme, when they had to be replaced i put r45s in it and they ran smooth and done great but when they had to be replaced i decided to shut a friend up that had been bugging me for two years about the e3 plugs up and i gave theme a go, they are the worse of the three i tryed, they didint run has smooth and fauled up quickly, so this time i went back to the r45s and they car runs strong and smooth. my car has the original points and stuff but i can tell you theme ac plugs are good plugs and best of all they have 9made in usa) on theme=] keep the american cars all american when possible=]
danthepontiacman is offline  
post #8 of 11 (permalink) Old 09-12-2011, 10:51 AM
Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,916
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
NEVER run champions in a GM !! They work great in MOPARS though, I guess sh!t works good in sh!t.
Rukee is offline  
post #9 of 11 (permalink) Old 09-12-2011, 04:46 PM
 
Join Date: Mar 2011
Location: Texas
Posts: 669
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
never had any problems with Champion in any car. They were not made by any car manufacturer's supplier and Mopar did not offer them in factory installations. They do not rust like AC does.
pontiac is offline  
post #10 of 11 (permalink) Old 09-12-2011, 05:31 PM
Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,916
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Quote:
Originally Posted by pontiac View Post
never had any problems with Champion in any car. They were not made by any car manufacturer's supplier and Mopar did not offer them in factory installations. They do not rust like AC does.
I worked at a dodge dealership in the `80s, all the new cars had champion plugs from the factory.
Rukee is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Spark Plugs... Leahburk714 Engine Discussions 5 06-15-2011 11:58 AM
Best spark plugs GuatoLT1 2004-2006 GTO General Discussion 9 11-24-2010 11:20 AM
Spark Plugs MaL 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 7 02-14-2010 01:16 PM
What spark plugs for the ls2? Ozzhead Service, Maintenance and Technical Discussion 22 02-18-2008 12:23 PM
Spark Plugs? NJG8GT Engine Discussions 6 02-14-2008 09:51 AM

Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome