HEI coil voltage - 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> General Rodding Tech
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-04-2010, 10:45 AM
sqzbox's Avatar
My pipes are my music
 
Last photo:
Join Date: Sep 2009
Location: indiana
Age: 64
Posts: 2,938
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
HEI coil voltage

How much additional voltage can a stock HEI handle from an aftermarket high voltage coil? I've got a 65,000v coil but was wondering if it would be too much for it. Thanks.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-04-2010, 03:49 PM
T-bucket23's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Engine basic condition - how to check Last photo:
Join Date: Aug 2005
Location: Massachusetts
Age: 57
Posts: 5,288
Wiki Edits: 26

Thanks: 7
Thanked 130 Times in 114 Posts
It doesn't matter. As long as you have a decent cap and wires. The internals of the HEI only care about the primary voltage and resistance not the secondary voltage.
__________________
Artificial Intelligence is no match for Natural Stupidity



Chet
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-05-2010, 03:24 AM
sqzbox's Avatar
My pipes are my music
 
Last photo:
Join Date: Sep 2009
Location: indiana
Age: 64
Posts: 2,938
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Stock cap and pro comp 10.2mm spiral wires. Guess I'll give it a shot next weekend. Thanks!
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-16-2013, 08:05 AM
Registered User
 
Join Date: Oct 2013
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
buzz

Good to here someone working with a 318. I love Mopar. I do know one thing about the H.E.I. . They are power hungry. That stock wire my 72 Chevy Pick-up was too small. I put a 12gage wire to the B+. You will find guys tying an electric choke into this primary wire too. The buzz noise is puzzling though. What comes to my mind right off is there is too much load on it, but why at idle only. You don't have a ballast resister in the circuit somewhere do you.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-16-2013, 09:02 AM
Registered User
 
Last photo:
Join Date: Sep 2012
Posts: 204
Wiki Edits: 0

Thanks: 12
Thanked 11 Times in 10 Posts
The two questions you need to ask are one, how does the 65KV coil produce the higher voltage, and two, how much more heat will it produce? Heat is the enemy of all electronic components and remember the HEI lives by a small internally mounted electronic module.

A quick answer to both questions is that the higher voltage coil produces higher voltage by reducing the primary coil winding count and increasing the secondary winding count. Reducing the primary windings raises primary current load. The little HEI module has to take this load. The higher ratio of primary to secondary windings also increases the inductive "kick back" through the primary circuit as the coil fires. These factors weight heavy on the life expectancy of the module. The higher primary current and the higher KV output also creates alot more heat which further decreases the life of the module.

Companies like DUI that produce high output HEIs take these factors into account and use components that are better suited to the task. I have seen too many failed HEI modules where a high output coil was added to ever recommend it. I guess if you use the vehicle only for drag racing and trailer it to the track, that's one thing. But if you want reliability, think twice about running the 65KV coil in your stock HEI.

An externally mounted coil helps remove some of the heat load but the only sure way to run high KV and keep it reliable is an add on module like the MSD. The add on module takes the heavy current load off the little HEI module and you can run all the coil you want. The new digital add ons are best for this.
Reply With Quote Quick reply to this message

Recent General Rodding Tech 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
Is a New 65,000 Volt coil HEI DISTRIBUTOR for BBC WORTH IT? MuscleBlock81 Engine 24 09-22-2008 07:22 PM
Change the HOT HEI coil V305 Electrical 1 08-12-2008 03:11 PM
starter solenoid shorting ignition junkyardjeff Electrical 5 03-24-2007 04:15 PM
HEI ignition problem coyote74 Electrical 5 01-27-2007 03:10 PM
HEI Coil adryan16 Electrical 3 03-16-2004 08:39 PM


All times are GMT -6. The time now is 11:29 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.