2 step off brake pressure switch ?

[R5ROB]

Plan to hook up my 2 step off a brake pressure switch but have a wiring question
How do u wire it correctly so it doesn’t activate at the finish line when I would get on the brakes on decel
I don’t have a clean neutral valve body
Any advice on how to wire correctly would be greatly appreciate
Thanks Bob

[Mike Pearson]

Originally Posted by R5ROB

Plan to hook up my 2 step off a brake pressure switch but have a wiring question
How do u wire it correctly so it doesn’t activate at the finish line when I would get on the brakes on decel
I don’t have a clean neutral valve body
Any advice on how to wire correctly would be greatly appreciate
Thanks Bob

Put as micro switch on your shifter so the two step will only activate in low gear

[black88coupe]

Sounds like it would be slow to react hooked up like that.

[Bob Mulry]

Originally Posted by black88coupe

Sounds like it would be slow to react hooked up like that.

Why do you say that???

Electricity travels at about 300,000,000 meters per second...

[Coleydog]

Just thinkng out loud, why would activating a two-step at the finish line be a problem? You have already let off the gas and most race converters stall at 4500 and above so if the 2-step activates at say 3500, wouldn't the engine just freewheel?
Besides on another note, if your shifter allows going to reverse by accident at the finish line, you need a better shifter. My hand is on the handle ready to neutral before the line, then I brake.
Mike

[Tom Goldman]

Originally Posted by Coleydog

Just thinkng out loud, why would activating a two-step at the finish line be a problem? You have already let off the gas and most race converters stall at 4500 and above so if the 2-step activates at say 3500, wouldn't the engine just freewheel?
Besides on another note, if your shifter allows going to reverse by accident at the finish line, you need a better shifter. My hand is on the handle ready to neutral before the line, then I brake.
Mike

It isn't normal slowing that's an issue. ...It's a problem because if you stab the brakes at the stripe to tighten it up or give it back , the 2 step instantly pulling the engine to 3 or 4000 rpm is akin to using a Jake brake on a diesel truck .
Especially on a car with steep rear gears .

[black88coupe]

Originally Posted by Bob Mulry

Why do you say that???

Electricity travels at about 300,000,000 meters per second...

Im referring to the hydraulic pressure in the brake line taking longer to release the switch when you take your foot off the pedal. How would that action be equal too or faster than using say a transbrake switch on your shifter? The action from using a transbrake switch seems like it would be much quicker. Is there something im missing here? Thanks

[Dave Turner]

Originally Posted by black88coupe

Im referring to the hydraulic pressure in the brake line taking longer to release the switch when you take your foot off the pedal. How would that action be equal too or faster than using say a transbrake switch on your shifter? The action from using a transbrake switch seems like it would be much quicker. Is there something im missing here? Thanks

The shifter mounted switch won’t pass tech in Stock.

[Eman]

Originally Posted by black88coupe

Im referring to the hydraulic pressure in the brake line taking longer to release the switch when you take your foot off the pedal. How would that action be equal too or faster than using say a transbrake switch on your shifter? The action from using a transbrake switch seems like it would be much quicker. Is there something im missing here? Thanks

Probably is, but if you're not allowed a transbrake this is a way to leave at the same RPM every time footbraking.
I tend to scrub the brakes before the stripe to tighten it up, doing this with my foot on the throttle. If I didn't have a way to shut the 2 step off it would stutter at the top end. I have a switch that controls the power to the brake pressure switch and a small LED on the dash to show when the brake pressure activates the 2 step so I know I'm on the brake hard enough at the starting line.
I've thought about using a high gear pressure switch on the trans that would open the power circuit in high gear.

[Rob Petrie E395]

I've got my switch set at a pretty high pressure (Folk Race Cars "The Answer"). So unless something drastic happened and I locked up the brakes. I don't think it would engage anyways. But what I did just in case. Is I put a toggle switch on the dash. It has one of those red switch covers on it like something out of a military plane or vehicle (summit sells then as well as a lot of the chain auto parts stores). I have the cover up on the starting line and the switch is on. After I leave. I reach over and hit the red switch cover and when it comes down it turns the switch off. After a couple runs it becomes second nature. .And I don't have to look to make sure I'm turning off the right switch. I can do it now without even looking.