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| Battery Cutoff | Login/Join |
DRR Pro |
Dead on! | |||
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DRR Sportsman |
Ok, I guess the "verbage" being used was confusing to me. The "only one" term is concerning a "master disconnect switch". I definitely agree with that. My term of "emergency stop" switch is concerning the push buttons that activate or de-activate the electric solenoid or solid state relay that becomes the "master disconnect switch" when you replace the manually activated one with an electric one. Again, there would only be one "master disconnect switch". But there would 2 "emergency stop" buttons (switches - N.O. or N.C.) that control the "master". And if you are using the "positive" wire to control the "master disconnect switch" that is electrically controlled, then you will lose the ability to turn on the "master disconnect switch" with the "emergency stop" buttons because you will lose the positive power at the "emergency stop" buttons since the "master" kills ALL positive power going to the vehicle (isolates the battery). But the rule states that the "master disconnect switch" must remove ALL positive power from the vehicle (isolates the battery), not just to a control panel that controls everything. It all really comes down to who is looking at the car and how they interpret the rule. And now I've got a headache from over-thinking this !  Tim West "Wild Wild West" Racing mickeythompsontires.com tciauto.com compcams.com www.motorsportsinnovations.com | |||
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DRR S/Pro |
So you can cite when someone was booted with proof? ____________________________ 2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion 2018 Div4 Goodguys Hammer award winner | |||
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| DRR S/Pro |
True about the interpretation. Opinions on here are usually guided by how you do it also when interpreting. My set up is no different than how a key started vehicle works. The power still runs to the key switch even if all power has been removed from every other part of the car. I guess we will find out if it's a problem of interpretation when I get teched. ____________________________ 2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion 2018 Div4 Goodguys Hammer award winner | |||
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DRR Pro |
i am unsure how many ways this can be construed but we live in a self identifying world so there is most likely a LOT ... lol ...
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| DRR Pro |
That 200+ amp relay, that you are calling the Master Cutoff is in fact NOT. The N/C push to open contact switch mounted on the rearmost exterior that +12v goes through IS the Master Cutoff. Here’s an example. I mounted that same N/C push to open switch to the rearmost exterior of my car. From my Digital Delay relay board I un-pinned the +12v wire that goes from the relay board that provides all power to the toggle switch panel. I ran a 16 gauge wire from the positive battery post to the N/C push to open switch contact, and then continued with a 16 gauge wire to the un-pinned wire that provides +12v for the toggle switch panel. When this switch is in pulled ON position, the toggle switch panel is supplied with +12v and relays that control the electrical functions of the car can active. Pushing to off, all power to the toggle switch panel is removed and “stops all electrical functions”. LEGAL. That switch IS the Master Cutoff. Total +12v Power does NOT need to be removed from the car. Read the rule. | |||
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| DRR Pro |
Top paragraph NOT Legal....... Bottom Paragraph LEGAL | |||
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DRR Trophy |
I would bet most NHRA ProMods and Pro Stock cars use a SSR to cut power from the battery which in most cases is also mounted in the drivers compartment. Meziere Tech. Make sure your water pump is on whenever you check your coolant level. | |||
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DRR Top Comp |
I am pretty sure some of the brand new Dragsters come with the SSR or electrical solenoids as standard equipment. They pass NHRA tech every time. I asked about that when I built my dragster a few years ago and they said it okay. So that is the direction I went on it. On the latest Altered I am building I have the standard Mechanical cut off in the back that kills everything from back. Then down line I have an electrical SSR that I can kill power from inside car. https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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| DRR Elite |
I'd like to hear what Bill Masiello says who is an NHRA Div1 Tech inspector that posts here on occasion. | |||
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| DRR S/Pro |
Just thought I would give an update to this. I have been using my electric solenoid main power cut off all year and wish I had done it so much sooner. I love having the button on my steering wheel and it has caused me zero problems since the install. Overall a 10 out of 10. ____________________________ 2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion 2018 Div4 Goodguys Hammer award winner | |||
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| DRR Pro |
I have used the continual-duty solenoid for years. Been through NHRA tech at many tracks. It has a pull-on switch on rear body panel and a pull-on switch on my dash. Push either switch IN and everything is off as the 12V cable from the solenoid to the relay board and fuel pump relay is shut-off. If either switch is pushed in (off) the other one is also off. They both need to be pulled-out to have 12V to anything in the car. Been doing this for over 20 years, National Events, Divisional, local and all tech inspections have been without an issue, ever. | |||
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