bypassing the T-brake button for reverse
#2458147
02/26/18 11:11 PM
02/26/18 11:11 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
OP
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OP
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Mt. Vernon, Ohio
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First of all I really love my CRT billet probrake, what I am having trouble getting used to holding the button and trying to back up and negotiate the car, if I remember correctly some one had a wiring diagram showing how to wire up the trans reverse light/neutral safety switch to activate the t-brake when in reverse mode, all the while not back feeding into the delay box, anyone still have this diagram handy??
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: bypassing the T-brake button for reverse
[Re: dartman366]
#2458241
02/27/18 02:42 AM
02/27/18 02:42 AM
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Joined: Feb 2011
Posts: 1,454 Glendora Ca.
Just-a-dart
pro stock
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pro stock
Joined: Feb 2011
Posts: 1,454
Glendora Ca.
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I vaguely remember seeing that.
If I wanted to do that I would use a 1pole double throw relay (spdt) with the reverse lights activating it. relay common - brake solenoid n.c. term - power from delay box brake connection n.o. term - hot 12volt (line side of delay box)
This would isolate the box when the relay is applied and work normally the rest of the time
Read the rulebook though, about transbrake and 2step connections. Some tech guy could have a problem because you are adding a device into the circuit
Last edited by Just-a-dart; 02/27/18 02:57 AM.
"Just a Bracket car dressed up like a streetcar"
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Re: bypassing the T-brake button for reverse
[Re: dartman366]
#2458285
02/27/18 11:32 AM
02/27/18 11:32 AM
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Joined: Jul 2010
Posts: 2,422 Pittsburgh PA
Eric
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
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I ran a separate button off the wheel by my switch panel. In a pinch if the steering wheel button fails I can use it in a race also.
5.53 @ 125 1/8th on the launch control..more left in her!
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Re: bypassing the T-brake button for reverse
[Re: dartman366]
#2458393
02/27/18 02:24 PM
02/27/18 02:24 PM
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Joined: May 2005
Posts: 1,030 ohio
67mprfan
super stock
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super stock
Joined: May 2005
Posts: 1,030
ohio
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I had 2 buttons hooked up 1 on the steering wheel the other was on a cord under my seat so when I was backing up I can grab that and still be able to steer
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it. 67 Belvedere that worked it's way in the 10's
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Re: bypassing the T-brake button for reverse
[Re: Just-a-dart]
#2458517
02/27/18 06:33 PM
02/27/18 06:33 PM
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Joined: Jan 2003
Posts: 25,902 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
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Posts: 25,902
Rio Linda, CA
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If I wanted to do that I would use a 1pole double throw relay (spdt) with the reverse lights activating it.
I don't see the need for a relay. The BU light circuit of the 3-prong NSS acts a Normally Open switch so, hooking it from battery power directly to the solenoid would only power the solenoid from that circuit when the shifter is in Reverse. Having the button and the NSS connected to the solenoid in parallel won't cause any feedback problems unless the button is pressed when in Reverse.
The INTERNET, the MISinformation superhighway
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Re: bypassing the T-brake button for reverse
[Re: DoubleD]
#2458610
02/27/18 10:47 PM
02/27/18 10:47 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
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I Live Here
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OP
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Mt. Vernon, Ohio
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True - but the delay box will get back fed and will activate the lock out on the box - so you have to waite to use the trans brake - plus the NSS is not rated for 30 amps - which is what a trans brake can draw I was thinking somewhere in the diagram I was talking about there was a diode involved to prevent that, with my T-brake the button will activate reverse in neutral also so you would just have to remember to put it in neutral and use the T-brake button if you needed to back up on the starting line area, in the pit area it wouldn't matter you just wait for the delay to drop out.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: bypassing the T-brake button for reverse
[Re: dartman366]
#2458761
02/28/18 11:20 AM
02/28/18 11:20 AM
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Joined: Jan 2003
Posts: 2,299 NE Ohio
DoubleD
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Posts: 2,299
NE Ohio
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True - but the delay box will get back fed and will activate the lock out on the box - so you have to waite to use the trans brake - plus the NSS is not rated for 30 amps - which is what a trans brake can draw I was thinking somewhere in the diagram I was talking about there was a diode involved to prevent that, with my T-brake the button will activate reverse in neutral also so you would just have to remember to put it in neutral and use the T-brake button if you needed to back up on the starting line area, in the pit area it wouldn't matter you just wait for the delay to drop out. Yes you can put a diode between your box and the the transbrake solenoid - that will do the same thing - but your going to need a 30 amp diode - The diode will stop the back feed to the box when you use your back-up switch
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Re: bypassing the T-brake button for reverse
[Re: DoubleD]
#2458983
02/28/18 05:46 PM
02/28/18 05:46 PM
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Joined: Jan 2003
Posts: 1,609 westerly, ri. usa
440lebaron
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top fuel
Joined: Jan 2003
Posts: 1,609
westerly, ri. usa
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Hi, my delay box has 2 delays, 2 buttons on wheel left and right side, second button delay is set for 9999 sec. plenty of time to back up gary
all parts are sold as is, all parts are considered used no warranties or returns paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred site is not monitored 24/7 there might be a delay in response
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Re: bypassing the T-brake button for reverse
[Re: DoubleD]
#2459004
02/28/18 06:26 PM
02/28/18 06:26 PM
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Joined: Feb 2008
Posts: 715 Central TEXAS!!!!
sr4440
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super stock
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Central TEXAS!!!!
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True - but the delay box will get back fed and will activate the lock out on the box - so you have to waite to use the trans brake - plus the NSS is not rated for 30 amps - which is what a trans brake can draw really? because A typical transbrake solenoid draws 1.4 ohms resistance. 12 volts divided by 1.4 ohms = 8.57 amps! Now check this out... 16 volts divided by the same 1.4 ohms = 11.4 amps! The formula is one of three "Ohm's Law": V/R=I (the other's are V/I=R & IxR=V) and this simple check will help you decide what size fuse and what gauge wire should be used when wiring your race car or you can ask people on the internet. LOL Joe
Without Data, you’re just another guy with an opinion.
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Re: bypassing the T-brake button for reverse
[Re: dartman366]
#2459027
02/28/18 07:25 PM
02/28/18 07:25 PM
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Joined: Dec 2005
Posts: 11,638 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,638
Fulton County, PA
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I try to keep my electrical systems free of unneeded complexity and "stuff". We have a button on the wheel. Push the button and back up. It's a race car. I'm not parallel parking on a busy city street.
If the results don't match the theory, change the theory.
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Re: bypassing the T-brake button for reverse
[Re: CMcAllister]
#2459129
02/28/18 11:14 PM
02/28/18 11:14 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
OP
I Live Here
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OP
I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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I try to keep my electrical systems free of unneeded complexity and "stuff". We have a button on the wheel. Push the button and back up. It's a race car. I'm not parallel parking on a busy city street. no but sometimes the pit's can get pretty clogged up with car's and trailers and the ocasional dip stick that don't know how to park.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: bypassing the T-brake button for reverse
[Re: DoubleD]
#2459318
03/01/18 11:34 AM
03/01/18 11:34 AM
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Joined: Feb 2008
Posts: 715 Central TEXAS!!!!
sr4440
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super stock
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Central TEXAS!!!!
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I think I said “can” - as most boxes are rated up to up to 30 amps - also a solenoid is actually an inductive circuit - a little different calculation - but hey I am only an electrical engineer Really what is this different calculation? you might consider telling TCI about your different calculation, because they are doing it wrong. www.tciauto.com/media/custom/upload/221300-01.pdfand dedenbear! http://www.dedenbear.com/TECH_tipTXT1.htmI have a 15 amp slow blow fuse on mine and have never had a problem. Joe
Without Data, you’re just another guy with an opinion.
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Re: bypassing the T-brake button for reverse
[Re: DoubleD]
#2459380
03/01/18 01:49 PM
03/01/18 01:49 PM
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Joined: Jan 2003
Posts: 4,276 Morrow, OH
markz528
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Morrow, OH
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I think I said “can” - as most boxes are rated up to up to 30 amps - also a solenoid is actually an inductive circuit - a little different calculation - but hey I am only an electrical engineer Yes - and that is why you should put a freewheeling diode across the solenoid..........
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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