as vacuum increases. There is a hole in the back of the Edelbrock that is larger than the one from the Carter. Reason for edit: No reason given. (Yeah, a dangling participle). Edelbrock 1406 Vacuum connections, i've checked most of the archives and now I'm more confused than I was. You don't want that advance under load anyway. 80cut350chevy Forum Newbie Posts: 65 Age: 30 Loc: springfield, mo Reg: :59 PM - Post#2083024 In response to IgnitionMan So on my 650 dp I shouldn't use the port for the vacuum advance? What is your total timing? Greg_moreira Very Senior Member Posts: 3274 Reg: :16 AM - Post#2083133 In response to models916 the definition of "race motor" is rather broad. Obviously, early small blocks, including the 327 never had an EGR valve in place on their inlet manifolds, and, I doubt seriously tht someone building an early engine would have the complete lack of common sense to actually fit an EGR valve to their engine.
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However, it sure seems this info needs to be posted over, and over, and over, and. Because of the slower burn, you need more ignition timing lead. There are 2 types of vacuum advance pots. Greg_moreira Very Senior Member Posts: 3274 Reg: :01 AM - Post#2083141 In response to 80cut350chevy 80cut350chevy Said: So on my 650 dp I shouldn't use the port for the vacuum advance? Right side of the picture is driver side of the carb. Of the two vacuum sources.