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Thread: big block tunnel ram in jet boat, need carb help

  1. #1
    Junior Member SHOW GUEST
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    Apr 2017
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    1

    big block tunnel ram in jet boat, need carb help

    I bought a jet boat with edelbrock street tunnel ram and 2 1850/ I guess 600 cfm carbs, vacuum secondary with side hung floats. they are old and leaking, I want to replace them but I was told by jegs to use 2 double pump carbs with center hung floats. I am concerned about washing cylinders. has comp cam 568/ 578 lift and 292/296 duration, give me some advice, thanks

  2. #2
    Senior Member RACING JUNKIE Swiley383's Avatar
    Join Date
    Apr 2010
    Location
    White Bluff TN
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    604
    I have read vacuum secondary on a tunnel ram won't work right due to low vacuum. Contact Holley or Quick Fuel or some other carb manufacturer and see what they say.

  3. #3
    Senior Member RACING JUNKIE mytmouz's Avatar
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    May 2006
    Location
    Pelahatchie, MS
    Posts
    983
    My old boat had twin 850's on it, and I didn't have any issues, other than keeping fuel in the tank...
    If you think nobody cares, try missing a payment...


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