Alternator Switch - 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 08-22-2002, 06:15 AM
dollybud's Avatar
Member
 
Last photo:
Join Date: Apr 2002
Location: Trenton, On. Canada
Age: 66
Posts: 182
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Question Alternator Switch

I've read that by installing a switch on the field of your alternator to turn off the drag during a run you can increase up to 35 HP. Any truth to this, and has anyone tried it?

    Advertisement
__________________
Tom
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-25-2002, 10:26 AM
helrazr3's Avatar
im on a highway to hell
 

Last journal entry: new wheels and seats
Last photo:
Join Date: Mar 2002
Location: billerica, mass
Age: 50
Posts: 689
Wiki Edits: 0

Thanks: 1
Thanked 1 Time in 1 Post
Post

most of the drag i would assume would be coming from the pully. i dont see how shutting off the field would make a difference as far as power goes the alt. puts out power it doesn't use it so i don't see any advantage there, but i'm not a racer so they might know somthing i don't.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-08-2002, 11:55 AM
Old Fart
 
Last photo:
Join Date: May 2002
Location: Galt, California
Posts: 60
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Assuming you have a three wire Delco Alternator, the switch would have to be off prior to starting the car and many times the alternator will still self excite and start charging. I have seen these switches used on drag cars, including a friends, and have yet seen any proof that switching off the alternator does anything good. Most of the time it is going to do something bad. Most racers are running killer ignition systems which work much better with more juice. If you are running a 16 volt battery it won't matter whether you are running an alternator or not but if your running a 12 volt battery you will be much better off with the 13.5 - 14.5 volts that the alternator puts out.

I have seen homemade generator using Delco alternators powered by 3.5 horse Briggs motors so I seriously doubt you could ever see the difference in time slips.

Well you might. You could go slower without the alternator.

Al

<a href="http://www.AutoReWire.com" target="_blank">www.AutoReWire.com</a>
__________________
Al Campion
NORCAP Sales and Services
AutoRewire.com and Hot Rod Resins
P.O. Box 636
Galt, CA 95632
209-481-6496 or 209-748-5555
[email]e-mail: Al@AutoReWire.com[/email]
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-04-2002, 07:06 AM
dollybud's Avatar
Member
 
Last photo:
Join Date: Apr 2002
Location: Trenton, On. Canada
Age: 66
Posts: 182
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Smile

AL, check this site www.badasscars.com/techtips.
My alternator has 2 wires going to it in 1 push in terminal. Which is the field and what switch do you recommend if I decide to try this? Another dumb question....where do I hook up the positive side of a timing light when my battery is in the trunk? Starter? Thanks!
__________________
Tom
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-04-2002, 01:37 PM
roys63's Avatar
Member
 
Last photo:
Join Date: Dec 2001
Location: Nc
Age: 63
Posts: 907
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thumbs up

It is not worth adding a switch to shut down the alt you will allways forget to turn it back on, and MSDs like a lot of volts!The timing light can be hooked the the battery wire on the alt the big wire.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-06-2002, 05:50 AM
dollybud's Avatar
Member
 
Last photo:
Join Date: Apr 2002
Location: Trenton, On. Canada
Age: 66
Posts: 182
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Smile

Thanks Roys63
__________________
Tom
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



All times are GMT -6. The time now is 01:38 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.