Slant *       6       Forum
Home Home Home
The Place to Go for Slant Six Info!
Click here to help support the Slant Six Forum!
It is currently Mon Feb 24, 2025 12:15 pm

Unanswered topics | Active topics


» » Tech Q & A » Electrical

All times are UTC-08:00



Post new topic  Reply to topic  Page 1 of 1
  [ 8 posts ] 
  Print view Previous topic | Next topic 
Author Message
lincparts
 Post subject: 3 ohm coil?
PostPosted: Mon Oct 27, 2008 10:29 am 
Offline
EFI Slant 6

Joined: Thu Apr 19, 2007 9:37 am
Posts: 272
Location: oceanside Ca
Car Model:
If you run a 3ohm coil , can you remove/bypass the ballast resistor?
i seen it in some old posts and am wondering if its true and if so which coil (mopar EI installed on car ) is best?

_________________
63 valiant v200 Wagon 9.5, Schneider cam, E.I. 22 mpg all day
Top
   
Reply with quote  
KBB_of_TMC
 Post subject:
PostPosted: Mon Oct 27, 2008 11:22 am 
Offline
Turbo Slant 6

Joined: Fri Sep 09, 2005 9:51 am
Posts: 855
Car Model:
The stock coil is around 1.5 ohms and the primary impedence around 2.4 mH. The stock point-type ballast is designed to get hot and increase resistance; roughly R= (0.5 + 0.633*A) ohms where A is the current in amps, while the stock electronic ignition ballast is about a constant 1 ohm.

Hence, I'd suggest you bypass the resistor or you'd decrease your available spark energy (at least at low RPM) by a factor of ~40-50% (assuming the coil impedence is the same).
Top
   
Reply with quote  
lincparts
 Post subject: pertronix 3ohm
PostPosted: Mon Oct 27, 2008 11:32 am 
Offline
EFI Slant 6

Joined: Thu Apr 19, 2007 9:37 am
Posts: 272
Location: oceanside Ca
Car Model:
anyone run a pertronix flame thrower 3 ohm coil, bypassing the factory ballast resistor?

_________________
63 valiant v200 Wagon 9.5, Schneider cam, E.I. 22 mpg all day
Top
   
Reply with quote  
dusterguy225
 Post subject: Re: pertronix 3ohm
PostPosted: Mon Oct 27, 2008 1:24 pm 
Offline
Turbo Slant 6
User avatar

Joined: Sat Aug 02, 2008 8:49 pm
Posts: 707
Location: Bowling Green, KY
Car Model:
Quote:
anyone run a pertronix flame thrower 3 ohm coil, bypassing the factory ballast resistor?
Yep, I am! I did it quite a few months ago, and I bypassed the ballast. I have had no problems so far, and I love it. I am also running the stock ECU, but I want to get ahold of one of those orange ones, this one looks origional!

_________________
Image
'74 Duster 225 Super Six w/904
14" Cragar SS wheels
Top
   
Reply with quote  
emsvitil
 Post subject: Re: pertronix 3ohm
PostPosted: Mon Oct 27, 2008 2:45 pm 
Offline
Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
Quote:
anyone run a pertronix flame thrower 3 ohm coil, bypassing the factory ballast resistor?
Yep, no ballast and a Pertronix I for the points.

Runs good, and no problems starting.

_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)
Top
   
Reply with quote  
lincparts
 Post subject: sold
PostPosted: Mon Oct 27, 2008 2:54 pm 
Offline
EFI Slant 6

Joined: Thu Apr 19, 2007 9:37 am
Posts: 272
Location: oceanside Ca
Car Model:
i'm sold! I don't like/want the ballast and keeping a extra one with me sucks,so for the $39.00 its gotta be one of the best deals ever :D

_________________
63 valiant v200 Wagon 9.5, Schneider cam, E.I. 22 mpg all day
Top
   
Reply with quote  
dusterguy225
 Post subject: Re: sold
PostPosted: Mon Oct 27, 2008 4:08 pm 
Offline
Turbo Slant 6
User avatar

Joined: Sat Aug 02, 2008 8:49 pm
Posts: 707
Location: Bowling Green, KY
Car Model:
Quote:
i'm sold! I don't like/want the ballast and keeping a extra one with me sucks,so for the $39.00 its gotta be one of the best deals ever :D
I think it was definatly a good deal!

_________________
Image
'74 Duster 225 Super Six w/904
14" Cragar SS wheels
Top
   
Reply with quote  
Aggressive Ted
 Post subject:
PostPosted: Thu Dec 18, 2008 11:31 am 
Offline
Supercharged
User avatar

Joined: Mon Jan 15, 2007 5:05 pm
Posts: 3767
Location: Black Diamond, WA
Car Model:
Anyone ever try the square 3 ohm HV Pertronix coil that mounts on the inner fender with out the ballast resistor? If so, how well does it work?

Thanks!

_________________
Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG
Top
   
Reply with quote  
Display posts from previous:  Sort by  
Post new topic  Reply to topic  Page 1 of 1
  [ 8 posts ] 

» » Tech Q & A » Electrical

All times are UTC-08:00

Who is online

Users browsing this forum: No registered users and 32 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited