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Thread: foot braking

  1. #1
    Senior Member RACING JUNKIE
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    foot braking

    I have a 3600 vert and I am footbraking, will I et better with rpms at 3000 or would it et better at 2000 and then nailing it, she will hold at 3000 rpm max. wich will give me a faster et?

  2. #2
    Administrator RACING JUNKIE bjuice's Avatar
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    Hey MARK,,,you want to leave anywhere from 700 to 1,000 below flash..this is where you will get the most performance out of your converter and the reson they are built this way..yo may have to play with it a little to find the sweet spot..a transbreak will aloow a little higher flash..

    hope this helps..
    brian
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  3. #3
    Senior Member DYNO TECH
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    Yep, when we raced No Elec. I would stall at 3000 and flash the other 1500. Really helped the 60 ft. and reaction times.

  4. #4
    Senior Member EXPERT BUILDER
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    My old 3600 stall liked to be footbraked at 2600 for the best ET.
    I could get up to about 3200 out of it if I tried but like I said it ran better at 2600.

  5. #5
    Junior Member APPRENTICE
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    I know how to flash a converter with trans brake, how do you flash or know the stall of a converter in a footbrake car? Just by holding brake and gas till tires start to spin?

  6. #6
    Senior Member DYNO TECH
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    Quote Originally Posted by us7race
    My old 3600 stall liked to be footbraked at 2600 for the best ET.
    I could get up to about 3200 out of it if I tried but like I said it ran better at 2600.
    I agree, I did the same thing with a 4500 Hughes. I would stall it to about 3000 and then flash the rest. Gave real good 60' times and much quicker et. It also allows the suspension to work a little better because it isn't under as much preload.
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  7. #7
    Senior Member RACING JUNKIE
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    I leave dead against the converter with a brake...will the car 60' better with a two step 1000 rpm below the converter lockup? Car is 3050 lbs 60' is 1.32 the way I leave now.

  8. #8
    Senior Member DYNO TECH
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    Quote Originally Posted by Tod74
    I leave dead against the converter with a brake...will the car 60' better with a two step 1000 rpm below the converter lockup? Car is 3050 lbs 60' is 1.32 the way I leave now.
    With trans brake? I doubt it. This works well for ft brake applications mainly because the suspension reacts better and doesn't load the engine with fuel as bad. Most converters I've seen you have to really stand on the brakes and stomp the gas to the floor to get them stall. In my opinion this loads the engine to much, preloads the suspension and reduces the way weight transfers to the rear. This next item is a little off topic a, but it effects the way your car will respond. A big mistake I see with most ft brake setups is the way the front acclerator pump is set on the carb. You should set the cam so that the pump is not all used up stalling the car in the lights. and then adjust the nozzle size to eliminate stumbling. You want that shot when you go full throttle. This is not an issue with trans brake applications though because your on the floor when you stage.


    My converter will fullout brake stall to 6000 on the trans brake with no chip. With the setup we run the car likes to leave between 4200 and 5000 depending on track conditions. Haven't been able to keep it stuck any higher than 5000 with a 10 inch slcik. 4500 hundred seems to be the best all around RPM for us at most tracks.
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  9. #9
    Senior Member DYNO TECH
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    Quote Originally Posted by wfge
    I know how to flash a converter with trans brake, how do you flash or know the stall of a converter in a footbrake car? Just by holding brake and gas till tires start to spin?
    Thats pretty much it! :lol:
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