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-   -   Brake Pressure Switch for launch control ??? (https://classracer.com/classforum/showthread.php?t=87649)

SDT1DYI 07-19-2024 11:36 PM

Re: Brake Pressure Switch for launch control ???
 
Quote:

Originally Posted by Bobby Fazio (Post 700018)
Has anyone done this with Precision Shifter forward pattern? Can someone send me a pic or point me to a good reliable microswitch and mount? Thanks!

https://precisionperformance.com/wp-...17/04/406b.jpg

There should be a micro switch that PPP can supply that mounts opposite side of the Netural safety switch. It's triggered by the same rod. No external bracket and switch required then . Very clean and they provide a screw on connector wiring harness same as the Safety switch hasness .

Ben Holt 07-20-2024 04:29 PM

Re: Brake Pressure Switch for launch control ???
 
Just curious how much brake pressure do you use at the starting line? I have seen a lot of data and have never seen brake pressure over 4-500 psi (on 160 mph plus cars). I would think anymore than that would lock em up bad at the stripe.....

GTX JOHN 07-20-2024 06:10 PM

Re: Brake Pressure Switch for launch control ???
 
Set @ 800 and release @ 200 generally on our stuff.
120/125 MPH Stockers.

Barry Polley 07-23-2024 12:20 AM

Re: Brake Pressure Switch for launch control ???
 
Quote:

Originally Posted by Bobby Fazio (Post 700136)
Thanks Barry! You can PM me or email me bobby.fazio@gmail.com.



Pics and video sent Bobby..

Rich Biebel 08-17-2024 03:36 PM

Re: Brake Pressure Switch for launch control ???
 
Anyone hook up this setup using a Turbo Action Cheetah with a reverse pattern 3 speed trans ?

I'd like to try it and making a switch to only work in low gear looks like a challenge.....

Mike Merk 08-18-2024 10:48 AM

Re: Brake Pressure Switch for launch control ???
 
2 Attachment(s)
Quote:

Originally Posted by Rich Biebel (Post 701563)
Anyone hook up this setup using a Turbo Action Cheetah with a reverse pattern 3 speed trans ?

I'd like to try it and making a switch to only work in low gear looks like a challenge.....

I haven't done it with a reverse pattern but I think it could be done fairly easily by mounting a momentary, lever micro switch on a bracket attached at the trans pan rail or in tandem with the shift cable bracket. Switches like these are available in short or long arm for less than $20. Should be able to activate when the shift lever arm is in low gear only.

GallopinGhost 08-18-2024 11:30 AM

Re: Brake Pressure Switch for launch control ???
 
1 Attachment(s)
Easy to do. I use a neutral start switch I got from turbo action.





Quote:

Originally Posted by Rich Biebel (Post 701563)
Anyone hook up this setup using a Turbo Action Cheetah with a reverse pattern 3 speed trans ?

I'd like to try it and making a switch to only work in low gear looks like a challenge.....


Rich Biebel 08-18-2024 11:50 AM

Re: Brake Pressure Switch for launch control ???
 
Quote:

Originally Posted by GallopinGhost (Post 701581)
Easy to do. I use a neutral start switch I got from turbo action.

Thanks, that is a great solution. I didn't know if it would work

I'm an old pure foot breaker but always open to trying something different.

When I owned this car in 2006 I did install a 2 step button switch and low rpm adjustable chip but never used it.

It was not comfortable to me leaning hard on the brake pedal and using that hand operated button.

Using the brake pedal with a pressure switch sounds more appealing

I have taken the shifter apart at least 4 times to do various things.....one more time can't hurt....

Rich Biebel 08-18-2024 12:16 PM

Re: Brake Pressure Switch for launch control ???
 
Quote:

Originally Posted by Mike Merk (Post 701577)
I haven't done it with a reverse pattern but I think it could be done fairly easily by mounting a momentary, lever micro switch on a bracket attached at the trans pan rail or in tandem with the shift cable bracket. Switches like these are available in short or long arm for less than $20. Should be able to activate when the shift lever arm is in low gear only.

The problem with that on a reverse pattern is the shifter or lever is moving toward the switch as you upshift. The switch would also be in the way going back to N-R-P

I've made switches like that on other cars but the shift pattern was forward.

I'm sure it can be done but it takes some thought and fabrication

The built in neutral start switch posted above is a good solution

Eman 08-19-2024 12:24 PM

Re: Brake Pressure Switch for launch control ???
 
If you're just bracket racing and not class racing I did it an easy way. I put a trans brake button on the steering wheel. If I put my thumb on the button it would energize the circuit for the brake pressure switch. After launch I just moved my thumb. On 3 speed GM transmission you can use a pressure switch on the transmission pressure port.


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