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Need to slow down footbrake reaction time
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DRR Sportsman
posted
Was consistently 55-75 red. Car has 27" tall tires on front at 24 PSI, and 32" on the rear all the way down to 8 PSI. Leaving at 1800-2000 RPM.

I know larger tires would slow the reaction some, but I don't see it getting rid of more than 20 numbers.

Any ideas on how to get rid of about 70 in the reaction? I can try to go down to 1500 leave, but might be getting into the Stumble zone.
 
Posts: 607 | Location: UTD | Registered: September 25, 2019Reply With QuoteReport This Post
DRR Pro
Picture of CURTIS REED
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I don't believe -.055 to -.075 is a car reaction issue that you can work out. It's a following the tree issue that needs to have the driver fixed. JMO



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Posts: 2361 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
DRR Sportsman
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You are probably correct. I definitely don't claim to know what I'm doing foot braking.

Its just Odd to me that I am anticipating the tree within that close of a range. That range was 6 out of 9 test and tune runs.
 
Posts: 607 | Location: UTD | Registered: September 25, 2019Reply With QuoteReport This Post
DRR Trophy
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Led or incandescent tree? When we still had incandescent bulbs, I was leaving when i saw yellow, was always red. I had to wait til bulb was fully lit, then I had .030/.035 lights. When the track switched to LED and I was leaving the same way, I was always late. I had to switch back to leaving as soon as I thought I see yellow. I even tried to block out the first two bulbs and concentrate on just the bottom bulb. That didnt work as well as reacting to the light coming on by following the tree.
 
Posts: 238 | Location: Nevada | Registered: February 01, 2009Reply With QuoteReport This Post
DRR Sportsman
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I feel like I'm reacting to the Flash of the LED
 
Posts: 607 | Location: UTD | Registered: September 25, 2019Reply With QuoteReport This Post
DRR Sportsman
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Have you tried using a blinder?
 
Posts: 1093 | Location: Elgin,IL | Registered: February 08, 2010Reply With QuoteReport This Post
DRR S/Pro
Picture of BP758
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quote:
Originally posted by Holytown:
I feel like I'm reacting to the Flash of the LED


Possibly a dark visor?
We’ve seen peoples head react to an LED brightness.


Raceless in California!
 
Posts: 4267 | Location: Vacaville  | Registered: January 07, 2004Reply With QuoteReport This Post



DRR Pro
Picture of Eman
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.055-.075 red? No way you're going to tune the car for that unless you create a stumble. blocking the tree might help as it slows down some and would stop you from counting or possibly anticipating.
 
Posts: 1295 | Location: E TN | Registered: February 13, 2009Reply With QuoteReport This Post
DRR S/Pro
Picture of BP758
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Lengthened my brake pedal.


Raceless in California!
 
Posts: 4267 | Location: Vacaville  | Registered: January 07, 2004Reply With QuoteReport This Post
DRR Elite
Picture of 1320racer
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quote:
Originally posted by Holytown:
Was consistently 55-75 red.

That’s ALL you!


O'IT!

Offering 1st hand experience and advice based on 3 decades of on track proven performance

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Posts: 12031 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Pro
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^^^^^^^^^^^^ AGREED

You won’t be going red using a blinder to view only the bottom bulb. Works best during daylight hours, but I have used mine at night at tracks that have the tree well lighted.

If you have a practice tree put an activation switch from the pedal to the tree. Set the R.O. so you’re 050 red , then practice going green with that setting.

If none of the above help, push (much) harder on the brake pedal. Doing this with a practice tree will show it slows your RT.
 
Posts: 1988 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by markemark:
^^^^^^^^^^^^ AGREED

You won’t be going red using a blinder to view only the bottom bulb. Works best during daylight hours, but I have used mine at night at tracks that have the tree well lighted.

If you have a practice tree put an activation switch from the pedal to the tree. Set the R.O. so you’re 050 red , then practice going green with that setting.

If none of the above help, push (much) harder on the brake pedal. Doing this with a practice tree will show it slows your RT.


Thanks, I will try all of this.
 
Posts: 607 | Location: UTD | Registered: September 25, 2019Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by markemark:
^^^^^^^^^^^^ AGREED

You won’t be going red using a blinder to view only the bottom bulb. Works best during daylight hours, but I have used mine at night at tracks that have the tree well lighted.

If you have a practice tree put an activation switch from the pedal to the tree. Set the R.O. so you’re 050 red , then practice going green with that setting.

If none of the above help, push (much) harder on the brake pedal. Doing this with a practice tree will show it slows your RT.


X2

Plus, many....many moons ago we used a brake pressure gauge also! Wink


1980 Camaro
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Posts: 1647 | Location: NV. | Registered: October 20, 2006Reply With QuoteReport This Post
DRR Sportsman
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Shallow stage your car on a .500 pro tree,and see what your real car-you reaction time is.You will find out your anticipating the last amber watching the tree on the full tree.I blind the tree ,have 1.55 60fts with trans brake 4,200 stall with 3.42 gears cuts low .5 lights .Dont know 60 ft. times you have ,but ft. braking the car leaves a tad slower than trans brake car.


HAMMER.
 
Posts: 1006 | Location: LIVERMORE CA. | Registered: June 27, 2006Reply With QuoteReport This Post



DRR Top Comp
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drink


.
Dave



F J B

Wake me when it's over
 
Posts: 4058 | Location: Earth | Registered: February 08, 2006Reply With QuoteReport This Post
DRR Pro
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Wish I could help, but I am really old school. I would simply wait longer. Take care. Tom Worthington


If it seems that bracket racing has gotten too expensive for you, maybe you are just doing it wrong.
 
Posts: 1075 | Location: Rocky Mount, NC | Registered: December 01, 1999Reply With QuoteReport This Post
DRR Pro
Picture of Goob
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Looser (lots) converter, more suspension travel, swap foot from brake to throttle.


"Despite the high cost of living, it remains popular."
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N375
 
Posts: 1173 | Location: Indy | Registered: November 21, 2008Reply With QuoteReport This Post
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