Leaving off a button in Stock

[67ss]

First of all, if I am not mistaken I thought it was legal to leave off a button and 2 step in stock, but not a transbrake. Maybe this is just an NHRA rule and not legal in IHRA. At any rate, with some bracket tracks going No Box instead of footrbake and not thinking my car would be suited to a transbrake leave I was thinking about this. If this is something anyone has played with how do you mount the button. I have heard of them being on the footbrake, but can you use just any old button to do it this way since you will be applying quite a bit of pressure to the butto? Or, is it just as easy to let go of the button with your finger and the footbrake at the same time? How much RT can be gained by leaving off a button and a low side pill vs. off just the footbrake?

[Mark Yacavone]

You can't leave off of a button in Stock, unless it's on the brake pedal, as of last year.

Like so:


The switch on the shifter is for low gear only activation of the two step.

[Philip Saran]

My understanding is for Stock Eliminator you can have a 2 step,
but the button can only be mounted on the brake pedal and it
is activated by your foot. Nothing that your hand could control.

[67ss]

Any special type of button you use for a brake pedal application? Can you say a button on the pedal is helpful with your RT vs. just leaving off the footbrake?

Never though about a micro on the shifter to only activate the low side in first gear only. Good idea.

[Robert Swartz]

Originally Posted by Mark Yacavone

You can't leave off of a button in Stock, unless it's on the brake pedal, as of last year.

Like so:


The switch on the shifter is for low gear only activation of the two step.

Mark,

I'm pleading to please accept my ignorance here. I'm slowly trying to reacquaint myself after all these years, I'm not familar with a 2 step (or a 3 step for that matter).

Is the switch on the brake pedal used simply as a rev limiter, limiting the amount of rpm's that you stall the converter? Also, is the switch on your shifter wired in conjunction with the roll control? This allowing you to control the peak rpm during your burnout.

Robert Swartz

[Donnie Moore Jr.]

Originally Posted by 67ss

First of all, if I am not mistaken I thought it was legal to leave off a button and 2 step in stock, but not a transbrake. Maybe this is just an NHRA rule and not legal in IHRA. At any rate, with some bracket tracks going No Box instead of footrbake and not thinking my car would be suited to a transbrake leave I was thinking about this. If this is something anyone has played with how do you mount the button. I have heard of them being on the foot brake, but can you use just any old button to do it this way since you will be applying quite a bit of pressure to the butto? Or, is it just as easy to let go of the button with your finger and the footbrake at the same time? How much RT can be gained by leaving off a button and a low side pill vs. off just the footbrake?

U need to check with the track you are running at because I have had problems in the past trying to do that "no box" means no electronics to leave starting line including 2steps... just letting you in on past experinence

[Mark Yacavone]

Originally Posted by Robert Swartz

Mark,

I'm pleading to please accept my ignorance here. I'm slowly trying to reacquaint myself after all these years, I'm not familar with a 2 step (or a 3 step for that matter).

Is the switch on the brake pedal used simply as a rev limiter, limiting the amount of rpm's that you stall the converter? Also, is the switch on your shifter wired in conjunction with the roll control? This allowing you to control the peak rpm during your burnout.

Robert Swartz

Robert, The 3 step is commonly used as such:
Module 1, used to limit starting line RPM.Usually an adjustable module
Module 2 , used for high side over- rev protection
Module 3 , used to limit burnout RPM, commonly hooked to the line loc
(Not used in car in picture.)

The switch on shifter is used to complete the 12V feed from the brake pedal button to the 3 step box for Module 1, in low gear only. That way, it won't activate when braking at the finish line.

[rutledge]

Is there any R/T difference leaving off of a rev limiter versus just footbraking?

Jacob

[67ss]

Originally Posted by Donnie Moore Jr.

U need to check with the track you are running at because I have had problems in the past trying to do that "no box" means no electronics to leave starting line including 2steps... just letting you in on past experinence

But if it is a No Box track that allows transbrakes they should allow the 2 step as well correct?

[Robert Swartz]

Originally Posted by Mark Yacavone

Robert, The 3 step is commonly used as such:
Module 1, used to limit starting line RPM.Usually an adjustable module
Module 2 , used for high side over- rev protection
Module 3 , used to limit burnout RPM, commonly hooked to the line loc
(Not used in car in picture.)

The switch on shifter is used to complete the 12V feed from the brake pedal button to the 3 step box for Module 1, in low gear only. That way, it won't activate when braking at the finish line.

Mark, thank you. I now better understand how a 3 step functions.