what should voltage read for best performance? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 08-02-2010, 08:38 PM
Member
 

Last journal entry: pro systems carb
Last photo:
Join Date: Jun 2004
Location: StThomas Ont
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
what should voltage read for best performance?

I'm not sure of the output of my alt. in amp's its a delco remy, but the battery reads 12.4 volts with the car not running. The alt reads 13.9 with car running but my autometer guage inside the car reads just over12 volts. Didnt check back at the battery with car running yet. The car is a 55 chevy with just the basic electrical draws, electric fan , afr meter in the lighter socket, electric fuel pump. If a component needs an upgrade which would it be? thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-02-2010, 10:12 PM
DOCTOR DC's Avatar
NUCKINFUTS MOTORSPORTS
 
Join Date: Apr 2010
Location: PACIFICNORTHWEST
Posts: 111
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
pumps and fans and lights and gobs more.add up ALL your electrical draws, as if everything had to be on at the same time. This is your bottom line. fully charged battery should read 12.6 (6 cells @2.1 per cell) 12.4 is a particuly charged battery. roughly 80%. alt output should be 14.2 to 14.7 running ,if battery is UP and and basic loads are being drawn. anything above nominal bat. voltage would put back into battery, just not enough. remember that the generator is not a charger, its a maintainer. inside gauge should read battery volts no matter where your wired it. Is this an externally regulated generator. yea yea I know people call it a alternator.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-02-2010, 11:42 PM
Member
 

Last journal entry: pro systems carb
Last photo:
Join Date: Jun 2004
Location: StThomas Ont
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Ok, sounds like my alt. not cutting the mustard, could be time to step up.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-03-2010, 07:25 AM
Registered User
 

Last journal entry: Some More Roll Cage Fabrication
Last photo:
Join Date: Apr 2010
Location: Ohio
Age: 31
Posts: 233
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Don't condem that alternator just yet. 13.9 volts is an acceptable value. Did you measure this under load? Did you measure this at idle? Figure out what type of alternator you have and test it again properly. Once you know the type you can search for the acceptable output voltages. Better yet you can take it to an auto store and have them test it in the vehicle.
For your guage issues it might be the guage or the wiring to the guage.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-03-2010, 09:15 AM
SSedan64's Avatar
Registered User
 
Last photo:
Join Date: Dec 2007
Location: Macon, GA.
Age: 50
Posts: 6,016
Wiki Edits: 0

Thanks: 0
Thanked 46 Times in 46 Posts
Good Alt. Info here.
http://www.madelectrical.com/electri...elcoremy.shtml
http://www.madelectrical.com/electri...hreewire.shtml
Other electrical articles ++
http://www.madelectrical.com/electrical-tech.shtml
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-03-2010, 08:35 PM
Member
 

Last journal entry: pro systems carb
Last photo:
Join Date: Jun 2004
Location: StThomas Ont
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks guys I'll dig deeper, I'm having stalling issue's at low rpm's and have played with the carb and timing for awhile. Is low voltage a possible cause of the motor wanting to stall. It's a 454 ls6 with brodix heads big solid cam 10.5 compression, initial timing at 20*, floats just below sight glass, 3500 Neil chance convertor, crane Hi6 box msd pro billet distributor, in park idle's at 1300rpm drive at 1000. The cam is a solid with 254/263 duration 620/629 lift, I've had the timing locked at 36* before and the motor still feel's like its going to stall and is very rich. The carb was custom built by pro systems, for my motor and combo.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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:

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

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
350 vs 383 build for performance Biscuit6447 Hotrodding Basics 20 03-05-2010 08:42 AM
Voltage drop. Please help. 77FIRE Electrical 15 05-23-2009 04:03 AM
Voltage Drop across Pressure Sender NovaSS350 Electrical 2 10-21-2008 07:50 PM
Voltage sensing with 1 wire alt bjr Electrical 7 09-15-2005 05:46 AM
427 or 454? frankenvette Engine 50 06-05-2005 10:12 PM


All times are GMT -6. The time now is 03:40 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.