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Thread: why would a carburator start burning my eyes???????

  1. #1

    why would a carburator start burning my eyes???????

    i have a 13 to1 406.i have a brodex intake and bow tie heads with 208.im running a 618 roller cam.with a quick fuel 850.its all new and first got it running it was running fine.but after the 6th pass it has started running rich and burning my eyes.any help fixxing it.

  2. #2
    Senior Member SENIOR BUILDER
    Join Date
    Dec 2007
    Location
    Morrison, Colorado
    Posts
    120
    What is your fuel pressure set at? Where are your floats set at? Do you have fuel coming out of the boosters while idling? What are the idle mixture screw set at? What is your initial timing? Need to know more about setup before we can help. Lots of things can cause that to happen.
    Mark Goulette
    Owner/Driver of the Livin' the Dream dragster
    www.livinthedreamracing.com
    Speed kills, but it's better than going slow!!!!

  3. #3
    fuel pressure is set at 7 1/2,floats are set at the bottom of the sight holes,no fuel coming out the boosters,the fuel mixture screws are set at 2 turns out both front and rear.timing at 36.

  4. #4
    Senior Member DYNO OPERATOR
    Join Date
    Aug 2007
    Location
    Lost Creek, WV
    Posts
    533
    Does your carb have a power valve?

    TS1955

  5. #5
    Senior Member SENIOR BUILDER
    Join Date
    Dec 2007
    Location
    Morrison, Colorado
    Posts
    120
    IMHO, I think your mixture screws are too far out. They should be between 1-1 1/2 turns. How much transfer slot is showing on your combo? Do you know what air bleeds you have in it? Idle feed restrictions?
    Mark Goulette
    Owner/Driver of the Livin' the Dream dragster
    www.livinthedreamracing.com
    Speed kills, but it's better than going slow!!!!

  6. #6
    i have tried them at 1 to 1 1/2 to 2 to 2 1/2 turn. and it does have a power valve.it a number 4.not sure how to check it if it bad.

  7. #7
    Senior Member SENIOR BUILDER
    Join Date
    Dec 2007
    Location
    Morrison, Colorado
    Posts
    120
    How does it respond when you change the mixture screws? You might have a pv issue. Pull it out, and try to blow through the flat part. If you can blow through it, it's bad. Gonna taste like crap though...... :shock:
    Mark Goulette
    Owner/Driver of the Livin' the Dream dragster
    www.livinthedreamracing.com
    Speed kills, but it's better than going slow!!!!

  8. #8
    ill try that now.i have it apart.so it taste as good as it smells?lol

  9. #9
    i tried to blow throw it and nothing.

  10. #10
    the pv 4.5 and the front jets are 78 and rear are 84..


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