SUPPORT OUR SPONSOR

Go Back   Club Cobra > Club Cobra Tech Areas > Shop Talk

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

Keith Craft Racing
Nevada Classics
MMG Superformance
Main Menu
Nevada Classics
Nevada Classics
Keith Craft Racing
Advertise at CC
Banner Ad Rates
Keith Craft Racing
MMG Superformance
March 2021
S M T W T F S
  1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31      

Kirkham Motorsports

Like Tree5Likes
  • 2 Post By patrickt
  • 1 Post By patrickt
  • 1 Post By 1795
  • 1 Post By twobjshelbys

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 09-02-2020, 10:58 AM
cycleguy55's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,466
Not Ranked     
Default Immobilizer / Anti-Theft / Kill Switch

I've been thinking about adding an electronic immobilizer, but concerned about another electronic device that could fail and leave me stranded. My thoughts therefore went to mounting a simple switch somewhere on the car I could flip when parking it. I have locking hood latches, so mounting it somewhere under the hood somewhere seems like a reasonable approach. I have read where others have mounted them under the dash so they're readily accessible and therefore more likely to be used.

What are people using? Pros and cons of different devices and/or locations?
__________________
Brian
Reply With Quote
Sponsored Links
Sponsored Links
  #2 (permalink)  
Old 09-02-2020, 11:02 AM
twobjshelbys's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2009
Location: Las Vegas, NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 4,139
Not Ranked     
Default

My car had a manual battery shutoff switch with a plastic key. Served the purpose. Since the batteries were right behind the seat it was easy to reach. I've seen others mounted on the dash.

PS. I don't think I've ever heard of a Cobra being stolen from a parking lot while at lunch... They're just not the kind of cars thieves jack.
__________________
Cheers,
Tony
CSX4005LA
Reply With Quote
  #3 (permalink)  
Old 09-02-2020, 11:27 AM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 20,589
Not Ranked     
Default

Most thieves can't drive a stick anymore. If you have a MSD unit, the box is wired to enable a "kill switch" with the existing wiring. Mucho simple. And if you really want to discourage someone from driving off with your car, get a quick release hub and take the steering wheel with you.
Alfa02 and MKS427 like this.
Reply With Quote
  #4 (permalink)  
Old 09-02-2020, 12:39 PM
cycleguy55's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,466
Not Ranked     
Default

Quote:
Originally Posted by patrickt View Post
Most thieves can't drive a stick anymore. If you have a MSD unit, the box is wired to enable a "kill switch" with the existing wiring. Mucho simple. And if you really want to discourage someone from driving off with your car, get a quick release hub and take the steering wheel with you.
Nothing that I can see in my instructions that specifically identify a switch other than the ignition switch. The only logical place to connect a switch would be in the circuit from the ignition switch (small red wire). Cut that and route it through the kill switch to kill the MSD input from the ignition switch.

Best place to install the switch? Under the hood? Under the dash?
__________________
Brian
Reply With Quote
  #5 (permalink)  
Old 09-02-2020, 12:48 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 20,589
Not Ranked     
Default

Quote:
Originally Posted by cycleguy55 View Post
Nothing that I can see in my instructions that specifically identify a switch other than the ignition switch. The only logical place to connect a switch would be in the circuit from the ignition switch (small red wire). Cut that and route it through the kill switch to kill the MSD input from the ignition switch.

Best place to install the switch? Under the hood? Under the dash?
The MSD instructions show you that grounding the white wire, or purple wire, through a switch will act as a kill switch (the color depends on how your distributor is installed). It's simple and easy.
Reply With Quote
  #6 (permalink)  
Old 09-02-2020, 12:56 PM
cycleguy55's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,466
Not Ranked     
Default

Quote:
Originally Posted by patrickt View Post
The MSD instructions show you that grounding the white wire, or purple wire, through a switch will act as a kill switch (the color depends on how your distributor is installed). It's simple and easy.
Not in 6AL instructions. If you can find it you're a better man than me. https://documents.holley.com/6425.pdf

I'll check the instructions for some of the other MSD boxes.

Edit: Found the reference in this document, which supposedly also applies to 6AL. Seems odd this isn't in above-referenced document if it applies to 6AL. https://documents.holley.com/6430.pdf

THEFT DETERRENT
The MSD provides the opportunity to easily install a theft deterrent kill switch (Figure 4).
White Wire Trigger
When using the WHITE wire to trigger the MSD, install a switch across the magnetic pickup VIOLET wire to ground. When the VIOLET wire is grounded, the vehicle will crank but not start.
Magnetic Pickup Trigger
When using the mag pickup to trigger the MSD, install a switch to the WHITE wire and the other side to ground. When the WHITE wire is grounded, the vehicle will crank but will not start.
__________________
Brian

Last edited by cycleguy55; 09-02-2020 at 01:03 PM..
Reply With Quote
  #7 (permalink)  
Old 09-02-2020, 01:11 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 20,589
Not Ranked     
Default

You know I remember that now, it seems MSD included the instructions in some instruction sets, but not in others. Anyway, it will work. Try it.
Reply With Quote
  #8 (permalink)  
Old 09-02-2020, 01:21 PM
cycleguy55's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,466
Not Ranked     
Default

Quote:
Originally Posted by patrickt View Post
You know I remember that now, it seems MSD included the instructions in some instruction sets, but not in others. Anyway, it will work. Try it.
BTW, I totally agree most of today's criminals would have a problem with a Cobra: 1) manual transmission; and 2) carburetor instead of fuel injection - especially if a cold start.

My ignition box is actually a Summit Racing box, supposedly built by MSD. The MSD 6AL and Summit instructions are almost exactly the same, so I'd expect the kill switch wiring would work the same way, but I've reached out to Summit to confirm. Thanks for the info, BTW.

Not asking you to give away any secrets, but - best location for switch?
__________________
Brian
Reply With Quote
  #9 (permalink)  
Old 09-02-2020, 01:23 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 20,589
Not Ranked     
Default

Quote:
Originally Posted by cycleguy55 View Post
Not asking you to give away any secrets, but - best location for switch?
Anywhere that is easily reachable under the dash, while you're sitting behind the wheel, and doesn't draw attention to the fact that you're doing it.
cycleguy55 likes this.
Reply With Quote
  #10 (permalink)  
Old 09-02-2020, 01:41 PM
1795's Avatar
CC Member/Contributor
Visit my Photo Gallery
Gold Star Contributor
 
Join Date: Aug 2013
Location: Canandaigua, NY
Cobra Make, Engine: SPF MKII Riverside Racer FIA
Posts: 2,035
Not Ranked     
Default

My ERA had a battery disconnect switch in the trunk near that battery. It was keyed so that you could take the key with you and attach it to your key chain. Since the trunk would be locked it would also be a deterrent.
cycleguy55 likes this.
__________________
Reply With Quote
  #11 (permalink)  
Old 09-02-2020, 02:44 PM
CC Member
Visit my Photo Gallery

 
Join Date: Jun 2007
Location: Caldwell, NJ
Cobra Make, Engine: ERA 427, 482ci sideoiler
Posts: 62
Not Ranked     
Default

I connected the white wire from my MSD 6al to a toggle switch mounted on the dashboard, easily accesible in an emergency . The kill switch looks the same as the other toggle switches and no switches are marked as to their function, hidden in plain sight. If you want to go all James Bond stealthy with the switch, use a magnetically actuated reed switch. I did this on a truck I had when I worked in a bad part of town. I mounted the reed switch behind the head liner which controlled a relay that killed power to the electric fuel pump. The magnet was hidden in the driver sun visor. When the sun visor was up against the headliner it would actuate the reed switch, killing the fuel pump. So, if the truck was hot wired it would start and then die when the fuel in the system was depleated due to the fuel pump kill switch rendering the pump inoperable. The sun visor/headliner location would not work in a Cobra, you would have to locate it some other place. The bottom line is, have sufficient insurance to replace the Cobra if it is stolen. If someone really wants to steal it you probably can't do anything to stop them.
Reply With Quote
  #12 (permalink)  
Old 09-02-2020, 03:24 PM
twobjshelbys's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2009
Location: Las Vegas, NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 4,139
Not Ranked     
Default

Quote:
Originally Posted by ERA174 View Post
If someone really wants to steal it you probably can't do anything to stop them.
As they say, "Locks just keep honest people honest".

All of these solutions really won't prevent someone from stealing your car if they really want it and have time. They just slow them down and cause them to move on to one they can get quicker.

You don't need to make Fort Knox. Choose whatever solution minimizes your inconvenience as it will be all that is needed.
cycleguy55 likes this.
__________________
Cheers,
Tony
CSX4005LA
Reply With Quote
  #13 (permalink)  
Old 09-02-2020, 06:33 PM
TLHanna's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2020
Location: Hazel Green, AL
Cobra Make, Engine: Backdraft 427w
Posts: 33
Not Ranked     
Default

My Backdraft has the electrical cut off that may or may not stop a theft but I added an alarm that will raise hell if the car moves and has a real time GPS locater that sends me texts and emails if the car is moved. Might not stop it but I'll find it if it's ripped.
Reply With Quote
  #14 (permalink)  
Old 09-02-2020, 07:36 PM
dallas_'s Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Sep 2009
Location: Dallas, tx
Cobra Make, Engine: FFR track car, SL-C track car
Posts: 1,258
Not Ranked     
Default

I put an under dash switch for my fuel pump. If they can get it started, they won't get far.
Reply With Quote
  #15 (permalink)  
Old 09-03-2020, 04:45 AM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Cobra Make, Engine:
Posts: 130
Not Ranked     
Default

Trunk mounted Flaming River Battery Disconnect (next to battery).

https://www.flamingriver.com/index.p...s014/FR1046LED

Single point Battery disconnect AND alternator cutoff switch available from Flaming River too.

Beyond that and a battery powered GPS locator if thieves want the car they will get it.

Last edited by Unique427; 09-03-2020 at 04:51 AM..
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 01:00 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy