Sunday, January 1, 2012

Trying to find out what port on edelbrock carb to operate vacum advace?

i have a chevy78blazer with a 350 very mild cam and edelbrock performer carb and intake. What vacum port should i use for my HEI distributer advance|||as your facing the front of your vehicle it will be the one on the left side of the carburettor near the base(it is ported which is what you need for your vacuum advance) a good way to check is to put your finger over the port with the engine running and have someone rev the engine to about 2500-3000 RPM you should feel it start sucking.|||Any manifold vacuum its all the same just make it look good : ) I retract . not informed but i do need to say there is absolute manifold pressure so porting it would change volume only.

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