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Help design a driver accessible master power cutoff! #3059112
07/14/22 08:00 AM
07/14/22 08:00 AM
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Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline OP
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At this point i am sorting out the best way to build a driver accessable power cutoff. Would like ideas that incorperate easy acsess by driver, main focus on panic situations.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: Help design a driver accessible master power cutoff! [Re: gregsdart] #3059117
07/14/22 08:29 AM
07/14/22 08:29 AM
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Mooresburg, Tn
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Use a cable and handle, like a parachute or a fuel injection cut off lever.

Brian

Re: Help design a driver accessible master power cutoff! [Re: '72CudaRacer] #3059124
07/14/22 09:00 AM
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Hot Rod Ridge
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Use two switches. One out back and one next to shifter

Re: Help design a driver accessible master power cutoff! [Re: FastmOp] #3059126
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https://board.moparts.org/ubbthreads/ubbthreads.php/ubb/showflat/Number/2892544/Searchpage/2/Main/237596/Words/%2Bcutoff/Search/true/re-inside-car-battery-shut-off.html#Post2892544


69 GTX 68 Road Runner
Re: Help design a driver accessible master power cutoff! [Re: '72CudaRacer] #3059129
07/14/22 09:32 AM
07/14/22 09:32 AM
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W. Kentucky
justinp61 Offline
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Originally Posted by '72CudaRacer
Use a cable and handle, like a parachute or a fuel injection cut off lever.

Brian


This is the simplest way. My buddy does it and puts the lever on a bracket just to the right of the seat on the floor. The lever stands straight up within easy reach.

Re: Help design a driver accessible master power cutoff! [Re: justinp61] #3059140
07/14/22 10:11 AM
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Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline OP
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My battery and master cutoff are both up front. Battery in front of radiater, switch on passenger side frame rail to right of radiater. I use a long morse cable to back of car. I will figure out how to bolt to the morse cable at the switch, then run the new cableback to the shifter area or up overhead by the parachute lever. Going up the side of the roll cage and mounting it by the roof/ parachute release seems to be about my best option?

20210905_090917~2.jpg
Last edited by gregsdart; 07/14/22 10:22 AM.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: Help design a driver accessible master power cutoff! [Re: gregsdart] #3059142
07/14/22 10:27 AM
07/14/22 10:27 AM
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northern,Ohio,USA
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Clanton Offline
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I searched the web a few yrs ago and wanted this big button like a factor control panel would have or a main switch like on the back of a car but next to the driver within reach with a short lever on it.Here is the button that will do 40 amps and maybe just have ign,fuel on it

LPCB6144.jpg

GOTBOOST!New improved with Victor heads.
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Re: Help design a driver accessible master power cutoff! [Re: Clanton] #3059159
07/14/22 12:03 PM
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Fulton County, PA
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CMcAllister Offline
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You already have all the hardware mounted in the car. No need to redo it if it works. Just piggyback a Morse cable into it.

I'm doing this on just about everything I get involved in. Just makes sense to be able to run it from the drivers seat for so many reasons.


If the results don't match the theory, change the theory.
Re: Help design a driver accessible master power cutoff! [Re: CMcAllister] #3059160
07/14/22 12:10 PM
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Las Vegas
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I use a morse cable. You have the right switch lever already. Just use a longer bolt and attach morse cable.

Excuse the unfinished stuff we are getting there with the Dakota...

[Linked Image]

[Linked Image]


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Re: Help design a driver accessible master power cutoff! [Re: CMcAllister] #3059195
07/14/22 01:47 PM
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Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline OP
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It does make sense for sure, McCalister
Al, looks great.
Clanton, that button was my first thought. No better deal than something you can slap quickly. I was thinking use a Ford starter relay, so not much juice required going through the button.

Last edited by gregsdart; 07/14/22 01:52 PM.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: Help design a driver accessible master power cutoff! [Re: gregsdart] #3059226
07/14/22 03:13 PM
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Bend,OR USA
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I would look at using a 250 amp R.V. 100 % duty solenoid so you can install it in series with the main battery feed to the car and use an on /off switch near you in the driver's seat to use in emergency scope wrench up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Help design a driver accessible master power cutoff! [Re: Cab_Burge] #3059255
07/14/22 05:19 PM
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dvw Offline
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Morse cable on mine. The rest are just scrap tune and plate fabbed up. Lever is attached at the roll cage.
Doug

0203131657.jpg
Last edited by dvw; 07/15/22 08:08 AM.
Re: Help design a driver accessible master power cutoff! [Re: gregsdart] #3059280
07/14/22 07:18 PM
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Re: Help design a driver accessible master power cutoff! [Re: gregsdart] #3059296
07/14/22 08:58 PM
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Clanton Offline
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Originally Posted by gregsdart
It does make sense for sure, McCalister
Al, looks great.
Clanton, that button was my first thought. No better deal than something you can slap quickly. I was thinking use a Ford starter relay, so not much juice required going through the button.
I was going to look on Amazon or some local to get the button.I think I am going to use this fastronics 305-040 50 amp push pull button.17$

pushpullpowerswitch.jpg
Last edited by Clanton; 07/14/22 09:20 PM.

GOTBOOST!New improved with Victor heads.
http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/
Re: Help design a driver accessible master power cutoff! [Re: Clanton] #3059341
07/15/22 07:35 AM
07/15/22 07:35 AM
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Apollo, PA.
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For those that run cables are those even legal? Have you ever had it commented on at tech? My NHRA rule book states all rod or cable must be of 5/16 diameter most of those look like 1/4 or less. Or is it the fact that the cable is just ancillary make it not relevant. I just looked at this rule for one of my cars I was working on a couple weeks ago. Using a shifter cable would be easier plus I have them laying around,but they aren't 5/16.

Re: Help design a driver accessible master power cutoff! [Re: B1MAXX] #3059344
07/15/22 08:04 AM
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dvw Offline
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Mines never been questioned. Been running it 10 years at numerous tracks. My bet is the rod and cable are way stronger than the switch itself.
Doug

Re: Help design a driver accessible master power cutoff! [Re: B1MAXX] #3059398
07/15/22 01:12 PM
07/15/22 01:12 PM
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Fulton County, PA
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Originally Posted by B1MAXX
For those that run cables are those even legal? Have you ever had it commented on at tech? My NHRA rule book states all rod or cable must be of 5/16 diameter most of those look like 1/4 or less. Or is it the fact that the cable is just ancillary make it not relevant. I just looked at this rule for one of my cars I was working on a couple weeks ago. Using a shifter cable would be easier plus I have them laying around,but they aren't 5/16.


The rule book is concerned with safety people being able to shut everything down at the rear of the car, in the event of a crash.. Beyond that, they won't or shouldn't care.

If you back into a wall at speed and tear it all up, probably doesn't matter if you have a cable or rod at that point.

Dragsters have had the master switch up by the battery forever, with a cable to the rear of the car to operate it.

High amp remote relays are becoming common now with the pushbutton/mushroom head switches being used to control them. Takes some specific switches and wiring to be able to control it from 2 locations - unless you use your old master switch set up to control the relay, rather than to function as the high amp connector. Modern and Speedwire and others offer these systems.


If the results don't match the theory, change the theory.
Re: Help design a driver accessible master power cutoff! [Re: B1MAXX] #3059412
07/15/22 01:41 PM
07/15/22 01:41 PM
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NC
440Jim Offline
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Originally Posted by B1MAXX
Using a shifter cable would be easier plus I have them laying around,but they aren't 5/16.
Most of the shifter cables I have seen are only 3/16" (#10 threaded end), but the outside of the sheath may be 5/16 or 3/8". Many shifters are harder to move then the electrical main cut off switch.
The rule is the rule, I can't change that. IMO, a 3/16" rod 12" long is not stiff enough, but a 3/16" morse cable with thick outer sheath is strong enough (if I was making the rule).
A 30 series Morse cable has #10-32 ends
A 40 series Morse cable has 1/4" ends.

I like the comment about it being a secondary mechanism.


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: Help design a driver accessible master power cutoff! [Re: CMcAllister] #3059417
07/15/22 01:49 PM
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The older Mr. Gasket and Moroso battery cutoff switches weren't rated very high on much current they can safely handle, I wore one out and learned that they are rated less than 100 amps puke
There are better ones available, I bought one rated at 250 Amps and it worked great so can you find one to buy when you do a search scope
Sorry for no links or company names: blush:


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Help design a driver accessible master power cutoff! [Re: Al_Alguire] #3059425
07/15/22 02:19 PM
07/15/22 02:19 PM
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montana
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My door car has one like Al's, except there is a parachute lever instead of a knob. Works great, and Tech inspector has not said a word.


64 Dodge Coronet 440. In progress
1998. Dodge Avenger. 8.35@165. 4400 DA
250” Neil and Parks Slip Joint. 7.36@183.
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242" Mullis Dragster. 6.90@ 200mph
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