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
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Joined: Dec 2005
Posts: 11,552 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,552
Fulton County, PA
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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 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.
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Re: Help design a driver accessible master power cutoff!
[Re: Clanton]
#3059649
07/16/22 11:51 AM
07/16/22 11:51 AM
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Joined: Jan 2004
Posts: 4,566 Motor City
6PKRTSE
master
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master
Joined: Jan 2004
Posts: 4,566
Motor City
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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.
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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
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Joined: Dec 2005
Posts: 11,552 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,552
Fulton County, PA
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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.
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Re: Help design a driver accessible master power cutoff!
[Re: CMcAllister]
#3059702
07/16/22 04:54 PM
07/16/22 04:54 PM
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Joined: Jan 2003
Posts: 9,996 Frostbitefalls MN (Rocky&Bullw...
gregsdart
OP
master
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OP
master
Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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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
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Re: Help design a driver accessible master power cutoff!
[Re: Clanton]
#3060671
07/19/22 07:24 PM
07/19/22 07:24 PM
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Joined: May 2011
Posts: 4,489 northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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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.
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