66 GTO Convertible / Correct Battery Size - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 07-16-2014, 10:08 AM Thread Starter
 
jgotzens's Avatar
 
Join Date: Jul 2014
Location: Germantown, MD
Posts: 25
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
66 GTO Convertible / Correct Battery Size

I have a 66 Convertible. Just got it recently and it starts and idles fine, but when it first starts there is a hesitation, then it fires up, almost as it needs more juice to get going. It is a 389 tri power. Battery shows 12.6 volts before starting. Battery is 670 CCA. Is that enough?
jgotzens is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 07-16-2014, 12:35 PM
Former Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,919
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
That should be enough battery. If when cracking it's hesitating (crankshaft stopping or almost stopping) then it sounds like the timing might be too far advanced. I have to retard my timing from normal settings with the lower octane fuels we have now.
Rukee is offline  
post #3 of 3 (permalink) Old 07-16-2014, 01:04 PM Thread Starter
 
jgotzens's Avatar
 
Join Date: Jul 2014
Location: Germantown, MD
Posts: 25
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks Rukee. I think you nailed it. I just advanced the timing some and it seemed to be running OK. No diesling but there is a bit too much "clunk" shifting. I was going to back it down. It's around 6 now.
jgotzens is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > GTO Forum Help > Gtoforum.com Site Help

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











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
Best tire size for 15x7 on 67 convertible MrT 1964-1974 Tempest, Lemans & GTO General Discussion 7 08-31-2013 07:29 PM
I need help in picking the correct fuel line size for 68 GTO tocagao 1964-1974 Tempest, Lemans & GTO General Discussion 10 04-11-2013 08:04 PM
What style battery cable is correct? 70conv 1964-1974 Tempest, LeMans & GTO Projects, Barn Finds & Restoration Discussions 3 07-16-2012 10:11 AM
Correct size for 66 gto speedometer?? Mr66GTO 1964-1974 Tempest, Lemans & GTO General Discussion 0 05-03-2009 07:37 PM

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