Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: New engine, very little vacuum, help!!!
Unless John has an idea, I am asking if you know what manifold vacumn is and ported vacumn is.
Some ports on the carb , do not have vacumn until the throttle plates are opened , thus allowing vacumn to the dist.
There should be a port on that holley, in the right front corner of the carb base, that's where you get manifold vacumn for the dist. You said a rebuilt carb? Number ?
Fact you have 5" vac at the rear tee, tells me something else. Any chance you got valves too tight? I know you said you adjusted to .030+-, but that is still good for a solid.
Just wondering if you have the dist off 180°, I have seen that and the motor will run but not good.
Might bring #1 cly up to tdc and pull cap off to see where rotor is pointing. its easy. I mean, something not right here, gotta look.
Oh, whats the pcv valve line doing? off the back of the carb base?
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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