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DRR Sportsman
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More like, it does happen as SL mentioned and so did tas. Just because it hasn’t happened to you yet doesn’t mean it doesn’t happen. But it is going to be funny when you roll a car out of the trailer one day and the battery is dead because the diode stuck on your hot wired alternator.

Like 67TSCHEVY, I want no power past the disconnect switch when the switch is off. Much safer not having a 10’ hot wire to risk shorting out. A good way to accomplish this is with the aforementioned 4 post switch.
 
Posts: 712 | Location: Upstate NY | Registered: July 02, 2013Reply With QuoteReport This Post
DRR Sportsman
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In a typical dragster situation with the fuel cell behind the driver and the alternator wire less then two feet away from the fill neck, I'm wanting that alternator wire to be dead with the master disconnect off in the event of an accident. Just because some people do things a certain way and have forever doesn't mean it's the only or best way. Why Ed still talks about Undercover and how they do/did things in this day and age still baffles my mind. Good luck with whatever way you choose> Kevin
 
Posts: 194 | Location: Corunna, Ontario, Canada | Registered: September 30, 2001Reply With QuoteReport This Post
DRR Elite
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I ain’t skeered neither are the thousands of racers who’s cars are wired the same l neither are the builders who are wiring cars exactly the same right now.

Further, I’ve got 2 of the best battery chargers, 2 spare alternators, 1 spare battery and my cars are on the charger overnight at every event. Again, a non issue and no concern to me.
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR / Crew
Picture of DragRaceResults
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lol... Ed your stuff's a dinosaur just like I told you a few weeks ago. Step up, move on, sell that tank. Things change, actually for the better. Besides it's worth a fortune now since your blessed by crook Kurt chassis is a dinosaur.

If you have a 50lb dinosaur battery like you use, the diode can probably stick and it be ok for a month. If you have a latest state of the art LI battery there isn't enough reserve capacity.

Come on man...
 
Posts: 2100 | Location: Gallatin, TN - U.S.A. | Registered: October 12, 2009Reply With QuoteReport This Post
DRR Elite
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My dinosaur still turns on a lot of win lights and collects big checks.

Again over 3 decades and not only haven’t I had this issue, I don’t personally know 1 racer that has.
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR / Crew
Picture of DragRaceResults
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lol now you know 2
 
Posts: 2100 | Location: Gallatin, TN - U.S.A. | Registered: October 12, 2009Reply With QuoteReport This Post
DRR Sportsman
Picture of 329L
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SL,
What is your opinion on the master switch that Danny Nelson cars usually have that is an electric cut off? I have re wired several of these cars, and it seems to work just fine. I really prefer mechanical switches for this, but one time i had a friend that was in a bad wreck in his dragster, and it had a mechanical switch in it, and because the chassis was twisted up and the cables were in a bind and wouldnt move the switch, "luckily" the car was on its side, and i was able to punch the switch and get the car to shut down. In that situation, an electric cut would have been better, because worse case, i could have ripped the wires off the switch. NHRA doesnt seem to care one way or another, as long as it has a working disconnect switch.


Jeremiah Hall
 
Posts: 704 | Location: Evansville, IN | Registered: February 24, 2010Reply With QuoteReport This Post



DRR Elite
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I know Elite Chassis has used this switch in their cars.
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by 329L:
SL,
What is your opinion on the master switch that Danny Nelson cars usually have that is an electric cut off? I have re wired several of these cars, and it seems to work just fine. I really prefer mechanical switches for this, but one time i had a friend that was in a bad wreck in his dragster, and it had a mechanical switch in it, and because the chassis was twisted up and the cables were in a bind and wouldnt move the switch, "luckily" the car was on its side, and i was able to punch the switch and get the car to shut down. In that situation, an electric cut would have been better, because worse case, i could have ripped the wires off the switch. NHRA doesnt seem to care one way or another, as long as it has a working disconnect switch.


When I rewire my dragster this winter I'll be using a solid state battery disconnect with switches.


Denis LeBlanc

 
Posts: 465 | Location: Manchester, NH | Registered: February 03, 2006Reply With QuoteReport This Post
DRR Pro
Picture of Goob
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Leaving a single circuit live when "disconnected" from power is just ignorant.
Especially one that carries a 100 Amp + load.

Carry on with your arguing if you want.


"Despite the high cost of living, it remains popular."
Dave Cook
N375
 
Posts: 1622 | Location: Indy | Registered: November 21, 2008Reply With QuoteReport This Post
DRR Sportsman
Picture of Mike Frizie
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anyone got a pn for the solenoid being used for the shut off?


Michael Frizie
ET 2471
 
Posts: 571 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by DRB Motorsports:
anyone got a pn for the solenoid being used for the shut off?


Cole hersee 24213 is what I've used


Denis LeBlanc

 
Posts: 465 | Location: Manchester, NH | Registered: February 03, 2006Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by Goob:
Leaving a single circuit live when "disconnected" from power is just ignorant.
Especially one that carries a 100 Amp + load.

Carry on with your arguing if you want.


My thoughts exactly. Easy enough to wire it this way, not sure why anyone would want a large high current wire always hot in 2022 when 4 post disconnects such as the Cole Hersee 75912 are easily available.
 
Posts: 712 | Location: Upstate NY | Registered: July 02, 2013Reply With QuoteReport This Post
DRR Pro
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I got my master disconnect solenoid from Fastronix. Joe Schmall has a great line of products.
I do one thing I didn't mention. I have a manual Moroso Master Disconnect on the Alternator cable. When I tow longer distances I kill the power to the alternator, just in case. Other than that the alternator wire is always live but in 12 years, on three different cars, no issues. Simple wiring for On-Off Master Switches. As long as the car shuts off when one of them is pushed in, all is good.


www.trailertoad.com designed by racers for racers.

 
Posts: 1218 | Location: Janesville, IA | Registered: December 21, 2004Reply With QuoteReport This Post



DRR S/Pro
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quote:
Originally posted by 183N:
quote:
Originally posted by Goob:
Leaving a single circuit live when "disconnected" from power is just ignorant.
Especially one that carries a 100 Amp + load.

Carry on with your arguing if you want.


My thoughts exactly. Easy enough to wire it this way, not sure why anyone would want a large high current wire always hot in 2022 when 4 post disconnects such as the Cole Hersee 75912 are easily available.


First I agree the 4 pole switch is a good idea but if you think not using this deal is a major issue then I guess you better move all your cars out of the garage attached to your houses cuz they may burn the house down! There are more potential issues with fire caused by "Rat Nest" wiring hack jobs then having one small wire run from the bat to the alt!

Just saying.
 
Posts: 2145 | Location: Tewksbury, MA,USA | Registered: November 03, 2000Reply With QuoteReport This Post
DRR Sportsman
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Agreed!
 
Posts: 712 | Location: Upstate NY | Registered: July 02, 2013Reply With QuoteReport This Post
DRR Pro
Picture of CURTIS REED
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For you guys wanting good relays to carry over 100 amps look here. They give good info on some of them about how much inrush amperage they will handle along with the continuous amperage and voltage. If you can't find what you need on here they probably don't make it.

https://www.texasindustrialele...c.com/relays.asp#top



____________________________
2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion

2018 Div4 Goodguys Hammer award winner
 
Posts: 2923 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
DRR Pro
Picture of Goob
posted Hide Post
quote:
Originally posted by TOP38:
quote:
Originally posted by 183N:
quote:
Originally posted by Goob:
Leaving a single circuit live when "disconnected" from power is just ignorant.
Especially one that carries a 100 Amp + load.

Carry on with your arguing if you want.


My thoughts exactly. Easy enough to wire it this way, not sure why anyone would want a large high current wire always hot in 2022 when 4 post disconnects such as the Cole Hersee 75912 are easily available.


First I agree the 4 pole switch is a good idea but if you think not using this deal is a major issue then I guess you better move all your cars out of the garage attached to your houses cuz they may burn the house down! There are more potential issues with fire caused by "Rat Nest" wiring hack jobs then having one small wire run from the bat to the alt!

Just saying.


I agree to the hazards of the wire nut and scotch lock electricians, but O.E. vehicles do have those live circuits fused or fusible link protected.
Just saying.


"Despite the high cost of living, it remains popular."
Dave Cook
N375
 
Posts: 1622 | Location: Indy | Registered: November 21, 2008Reply With QuoteReport This Post
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