I would like some input on whether a carb with vaccuum or mechanical secondaries would be better on my jet boat. Its a mild 455, Offy tunnel ram. Thanks.
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I would like some input on whether a carb with vaccuum or mechanical secondaries would be better on my jet boat. Its a mild 455, Offy tunnel ram. Thanks.
Go with the Mechanical Secondaries. They will open sooner and your accel will be much stronger.
I run 600cfm vacum secondaries
Mine is also a mild 455 with offy tunnel.
I was advised to run the vacums by more than one individual in the know.
I we were running built mills with mucho ponnies the additional fuel early on would be great but its probably way to muck for the horsepower we are making.
a pair of smaller double pumpers say 450cfm
jetted right might be a good choice?
Originally posted by vidrinek:
I would like some input on whether a carb with vaccuum or mechanical secondaries would be better on my jet boat. Its a mild 455, Offy tunnel ram. Thanks.
I USE AN 850 VAC SEC ON MY 455OLDS . IT WORKS GREAT. PULLS ALL THE WAY UP TO 54OORPM,S