60' and ET footbrake vs 2 step

Doug Domm · 10-17-2024, 10:43 PM

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

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

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

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

.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

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

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

Quote:

Originally Posted by 1320racer

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

Quote:

Originally Posted by e vassar

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

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?

10-17-2024, 10:43 PM	#1
Doug Domm Member Join Date: Apr 2006 Location: canada Posts: 251 Likes: 28 Liked 84 Times in 21 Posts	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 Last edited by Doug Domm; 10-17-2024 at 11:04 PM. Reason: Changed question mark to foot symbol

10-18-2024, 09:15 AM	#2
JP1738 Senior Member Join Date: Jan 2024 Location: Charlotte, NC Posts: 564 Likes: 1,599 Liked 1,169 Times in 331 Posts	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 __________________ Dawson Pauley #2827 N/SA 1980 Malibu SW 2S 305/180 #2827 S/ST 1978 Mazda RX7 w/ 383 sbc/glide

10-18-2024, 10:46 AM	#3
Doug Hoven Member Join Date: Feb 2018 Location: Jersey Posts: 211 Likes: 189 Liked 826 Times in 163 Posts	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. __________________ 1189 F/SA Defunzalo Racing Enterprises

10-18-2024, 11:00 AM	#4
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 2,628 Likes: 160 Liked 759 Times in 379 Posts	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.

10-19-2024, 01:02 PM	#5
ALMACK VIP Member Join Date: Jan 2009 Location: Bardstown, KY Posts: 1,937 Likes: 131 Liked 369 Times in 127 Posts	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 __________________ Alan Mackin Stock 3777/ SS 3377 P/SA & SS/PA Fox Thunderbird I/PS '95 Mustang GT

10-19-2024, 05:55 PM	#6
GarysZ24 VIP Member Join Date: Dec 2007 Location: Tempe, Az. Posts: 1,266 Likes: 905 Liked 232 Times in 92 Posts	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! __________________ Gary Hampton '86 Z24,173 V6 CF/S #5824 (#78 in 2021) Last edited by GarysZ24; 10-19-2024 at 05:58 PM.

10-20-2024, 06:00 PM	#7
e vassar Member Join Date: Jul 2015 Posts: 380 Likes: 67 Liked 271 Times in 107 Posts	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?

10-23-2024, 01:47 PM	#10
Mike Gray Senior Member Join Date: Oct 2006 Posts: 615 Likes: 309 Liked 685 Times in 196 Posts	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? __________________ Mike 7570 A/SA Last edited by Mike Gray; 10-23-2024 at 02:33 PM.