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-   -   60' and ET footbrake vs 2 step (https://classracer.com/classforum/showthread.php?t=88402)

Doug Domm 10-17-2024 10:43 PM

60' and ET footbrake vs 2 step
 
What kind of difference are you seeing in 60?, short time and et leaving off footbrake vs 2 step in a non trans brake car? Also on the 2 step are you leaving wide open throttle or just enough to activate it? Thanks Doug

JP1738 10-18-2024 09:15 AM

Re: 60? and ET footbrake vs 2 step
 
I currently leave off the footbrake but am interested to see what others say is quicker/more consistent

Doug Hoven 10-18-2024 10:46 AM

Re: 60? and ET footbrake vs 2 step
 
I'm going to do some testing on this topic myself soon. I think it depends on how your carburetor is set up. I've 2 stepped my car since I put the new engine in it last year, and I like being able to bump in at around 2000-2200, and then mash the throttle and not worry about the launch rpm. I've also chilled my engine a few times and haven't had a hesitation, where I've heard of racers having issues getting there cars to leave off the footbrake when they are ice cold. As far as EFI cars are concerned, I drove a car that was religiously foot braked by the owner, but I decided to use the 2 step that was in the car. It was a little faster on the 2 step (.03-.04) than on the footbrake.

1320racer 10-18-2024 11:00 AM

Re: 60? and ET footbrake vs 2 step
 
some are quicker and some are the same. That said, footbraker's stage RPM is typically limited by the ability of their brakes to hold the car, where's transbrake launches are not so if you stage at a higher launch RPM off the tranbrake you should run quicker assuming the car works.

ALMACK 10-19-2024 01:02 PM

Re: 60? and ET footbrake vs 2 step
 
.05 sec. for my 4 cyl. stocker

2 step vs. footbrake

but then again it's a turbo car so maybe that data does not apply to a n/a setup

GarysZ24 10-19-2024 05:55 PM

Re: 60? and ET footbrake vs 2 step
 
To borrow from former NBA great Dr. J. (Julius Erving), "I'M OLD-SCHOOL", so footbrake racing is the way I go.
Besides, that's one less part in my car that can go bad when it's supposed to be good!

e vassar 10-20-2024 06:00 PM

Re: 60' and ET footbrake vs 2 step
 
Are you guys using an adjustable brake pressure switch? Are you adjusting RT with brake pressure? Launch RPM? Or both?

Jeff Stout 10-20-2024 07:42 PM

Re: 60? and ET footbrake vs 2 step
 
Quote:

Originally Posted by 1320racer (Post 704300)
some are quicker and some are the same. That said, footbraker's stage RPM is typically limited by the ability of their brakes to hold the car, where's transbrake launches are not so if you stage at a higher launch RPM off the tranbrake you should run quicker assuming the car works.

His question was not about a transbrake comparison.

Doug Hoven 10-21-2024 08:08 AM

Re: 60' and ET footbrake vs 2 step
 
Quote:

Originally Posted by e vassar (Post 704461)
Are you guys using an adjustable brake pressure switch? Are you adjusting RT with brake pressure? Launch RPM? Or both?

I have an adjustable brake pressure switch. It has separate adjustments for ?arming? the 2 step and ?releasing?. This can effect reaction time a little, but mostly I use RPM adjustments for R.T.

Mike Gray 10-23-2024 01:47 PM

Re: 60' and ET footbrake vs 2 step
 
I’m new to 2steps (previously raced transbrake cars) not knowing where to start I’m at 2800 rpm using an electrical switch on the pedal. I see cars that roll forward before lifting the front tires and that would seem to be the best rather than picking them up out of the beam. I haven’t tried footbrake since the first two runs on the car. I’m also going to try and compare the difference. I have bias tires on the car now and 60’ 1.37-1.39 but plan on switching to radials. Is the leave comparable or am I going back to the beginning?


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