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
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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.
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My old boat had twin 850's on it, and I didn't have any issues, other than keeping fuel in the tank...
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Originally Posted by Swiley383
(Post 1529792)
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.
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I would consult a well known custom carb builder and have him spec and build you carbs. Less grief in the long run. Mark Whitener in Orlando Florida is who I recommend. Just google jmarkaudio. He also has a fuelsystems forum online. He has helped me on custom engine carbs..Prices of new Holley carbs are going up again March.
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