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Thread: Throttle restrictors HELP

  1. #1
    Junior Member SHOW GUEST
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    Mar 2003
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    Throttle restrictors HELP

    Does anyone know where I can find some device to restrict the movement of my throttle. I am trying to run a series that does not allow Throttle stops or any electronics. The only way I can see to run this is to restrict the operation of my throttle. I have seen a couple for 4150 and 4160 carbs but I have a dominator and need to come up with something in 2 weeks.
    ANY IDEAS ????????????????

  2. #2
    Senior Member DYNO OPERATOR
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    I'd fab an adjustable stop under the throttle pedal......

  3. #3
    Senior Member EXPERT BUILDER
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    Tell City, IN
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    I seen a BBC Camaro this past weekend at the track it was a 427.
    Not sure what was all in the motor but sitting on top was a Holley 2bbl...
    It had a homemade wooden spacer under it. So I had to ask the guy why and he said he runs the 6.50 index (1/8th) and needed to slow the car down..It had been running 6.50's all day long... :shock:

  4. #4
    Senior Member RACING JUNKIE curtisreed's Avatar
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    KIEFER, OK.
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    Restrictor plate under the carb. Easy to make you will just have to do some testing on sizing.

    Curtis

  5. #5
    Senior Member RACING JUNKIE
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    A guy I know just runs a bolt on his carb linkage, It prevents the carb from going to WOT. He adjusts it to his dial-in, and is very consistant.
    No matter where you go, there you are.
    **IN GOD WE TRUST**

  6. #6
    Junior Member SHOW GUEST
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    Aug 2008
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    Make an adjustable stop for your pedal. Use a piece of all thread, with some jam nuts. You can than Control how quick the car runs by adjusting the length. DO NOT USE A RESTRICTOR PLATE UNDER THE Carburetor. They cause distrabution problems.

  7. #7
    Senior Member MASTER BUILDER
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    the adjustable bolt under the pedal works well.. When we ran SC back in the 90's there was an altered (injected BBC) and he used the same set up... He had it down that 1 full turn was .007 in ET

  8. #8
    Senior Member MASTER BUILDER
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    Jan 2007
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    Batesville Ms.
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    I had good results with a vac carb and a screw to limit the sec opening, I had very good success with restrictor plates under the 2" spacer with out any bad effects and now I have Hilborn Stacks with the bolt deal in the acc petal and it is very easy to adjust. Later J. Smith 4621 racing sometime

  9. #9

  10. #10
    Senior Member DYNO OPERATOR
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    Rifle Colorado
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    Quote Originally Posted by jrdragsdad
    The problem with that style is that it put's a LOT of strain on the throttle cable/linkage when used to limit throttle opening. It's much better to limit pedal travel with an adjustable stop.


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