Help design a driver accessible master power cutoff! - Moparts Forums

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Re: Help design a driver accessible master power cutoff! [Re: Cab_Burge] #3059435 07/15/22 02:43 PM 07/15/22 02:43 PM
Joined: Dec 2005 Posts: 11,524 Fulton County, PA C CMcAllister Mr. Helpful
CMcAllister Mr. Helpful C Joined: Dec 2005 Posts: 11,524 Fulton County, PA	Originally Posted by Cab_Burge 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 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 Sorry for no links or company names: blush: The Moroso 74100 is no good. 20A continuous, 125A surge. The 74101 is the one to use, 175A continuous, 1000A surge, Make sure the switch has silver contacts, which I believe the 74101 does. The Littelfuse/Cole Hersee 2484-16 is also a silver contact switch and is 175A rated continuous and intermittence rated 800A at 6VDC-36VDC, 15 On, 5 Minutes Off. Probably the one Moroso sells as the 74101. If the results don't match the theory, change the theory.

Re: Help design a driver accessible master power cutoff! [Re: CMcAllister] #3059448 07/15/22 03:32 PM 07/15/22 03:32 PM
Joined: Jan 2003 Posts: 16,923 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,923 NC	These seem reasonably priced. A 43BC morse cable 6ft about $78. A 30 series Morse cable has #10-32 ends A 40 series Morse cable has 1/4-28 ends. https://www.go2marine.com/Pro-X-43BC-Replacement-Control-Cables?quantity=1&length=1499

Re: Help design a driver accessible master power cutoff! [Re: 440Jim] #3059616 07/16/22 09:16 AM 07/16/22 09:16 AM
Joined: May 2005 Posts: 1,964 Apollo, PA. B1MAXX top fuel
B1MAXX top fuel Joined: May 2005 Posts: 1,964 Apollo, PA.	That's what i was thinking...as long as the mechanism out the back is 5/16 were good. I was just wondering if anyone got questioned over it.

Re: Help design a driver accessible master power cutoff! [Re: gregsdart] #3059627 07/16/22 10:18 AM 07/16/22 10:18 AM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton master
Clanton master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Some people have used an air/CO2 with a Bimba cylinder to launch the parachute and that could also be connected to the shutoff turning it off at the same time.I will stick with the Ford relay and button to cut power and the main thing is to have it in a good place to de activate the power. 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] #3059649 07/16/22 11:51 AM 07/16/22 11:51 AM
Joined: Jan 2004 Posts: 4,563 Motor City 6 6PKRTSE master
6PKRTSE master 6 Joined: Jan 2004 Posts: 4,563 Motor City	Damn, you guys have me considering adding one inside my car now. I have also done the dreaded sit down, strap in , hit the ignition switch and nothing.... have to unstrap , get out, turn it on at the rear and try again. lol. 1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.

Re: Help design a driver accessible master power cutoff! [Re: 6PKRTSE] #3059669 07/16/22 01:21 PM 07/16/22 01:21 PM
Joined: Aug 2003 Posts: 43,119 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,119 Bend,OR USA	The only time I would normally turn off the rear battery shut off switch was in the winter when the car sat in the trailer from October to April 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] #3059687 07/16/22 03:31 PM 07/16/22 03:31 PM
Joined: Dec 2005 Posts: 11,524 Fulton County, PA C CMcAllister Mr. Helpful
CMcAllister Mr. Helpful C Joined: Dec 2005 Posts: 11,524 Fulton County, PA	Ford starter relays are for intermittent duty use. Solenoids used for a battery disconnect, that also carry the load of the car while running, need to be for constant duty use. They may look the same but they are not the same. We use constant duty solenoids for control of "ignition on" circuits, typically 80 -100A rated, but they aren't designed to carry the in rush of a starter motor. There are battery disconnectors/solenoids/relays made for this and designed to carry higher amperage and be in constant duty use.. But you can't buy them at an auto parts for $15. 250A continuous, intermittent well over 1000A Last edited by CMcAllister; 07/16/22 03:36 PM. If the results don't match the theory, change the theory.

Re: Help design a driver accessible master power cutoff! [Re: CMcAllister] #3059702 07/16/22 04:54 PM 07/16/22 04:54 PM
Joined: Jan 2003 Posts: 9,985 Frostbitefalls MN (Rocky&Bullw... gregsdart OP master
gregsdart OP master Joined: Jan 2003 Posts: 9,985 Frostbitefalls MN (Rocky&Bullw...	Originally Posted by CMcAllister Ford starter relays are for intermittent duty use. Solenoids used for a battery disconnect, that also carry the load of the car while running, need to be for constant duty use. They may look the same but they are not the same. We use constant duty solenoids for control of "ignition on" circuits, typically 80 -100A rated, but they aren't designed to carry the in rush of a starter motor. There are battery disconnectors/solenoids/relays made for this and designed to carry higher amperage and be in constant duty use.. But you can't buy them at an auto parts for $15. Thanks for correcting my miss information! ,🙄👍 250A continuous, intermittent well over 1000A There might be motorhome solenoids with high enough ratings, if that is what a guy wants to use. Overall it might be a lighter system by a bit. Last edited by gregsdart; 07/16/22 04:58 PM. 8..603 156 mph best, 2905 lbs 549, indy 572-13, alky

Re: Help design a driver accessible master power cutoff! [Re: gregsdart] #3059942 07/17/22 02:43 PM 07/17/22 02:43 PM
Joined: Sep 2003 Posts: 19,342 north of coder moparx "Butt Crack Bob"
moparx "Butt Crack Bob" Joined: Sep 2003 Posts: 19,342 north of coder	CM, i couldn't make out the complete tag on the solenoid you showed. any chance you have a pic that shows the whole tag ? [TIA !]

Re: Help design a driver accessible master power cutoff! [Re: Clanton] #3060671 07/19/22 07:24 PM 07/19/22 07:24 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton master
Clanton master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	I got the push switch from amazon and it is well made,no slop and I was thinking of mounting it on my shifter[PPP] Last edited by Clanton; 07/19/22 08:33 PM. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

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