Vacum Lines

[andymunoz]

HI guys, my post is for an urgent help for the only needed vacum lines i should have on a 231 v6 turbo engine, this engine is installed on a chevy Apache old truck and im missing the canister and most of the the check valves, the carburator is from a nonturbo version, i can tell you my only parts
i have for a vacum conection are: EGR VLV,WASTEGATE ,EFE/EGR TVS,
P.E.V.R, DISTRIB.,and a valve that comes with the left exhaust manifold, seems it connects both manifolds.Should i block everything else? take into mind it has a NA carburator that lacks several vacums.

 

[charlief1]

Do some reading

BEFORE BLACK Website

 

[b4black]

CARBURETOR POWER SYSTEM - Non-electronic carburetors use a Power valve to enrich the mixture during acceleration or high speed operation (to prevent detonation). This system is modified for Turbo applications. (One reason a Turbo carb is different than other carbs.) The power system works off manifold vacuum. Low or no-vacuum situations open the release (open) the power valve. Most carbs get this vacuum signal from a port with the carb. In a draw-through turbo set up, the carburetor is separated from the intake by the turbocharger. Releasing the throttle when the engine is under boost will produce vacuum within the plenum. However the intake will still be supercharged. The plenum vacuum will close the power valve and lean out the mixture and cause detonation. To correct this, the power system needs to be connected to the intake manifold down stream of the turbo. It also needs to be protected from boost pressure. (When the intake is pressurized, the power valve should receive no vacuum and no pressure). This is accomplished with a Power Enrichment Control Valve (PECV) or Turbocharger Vacuum Bleed Valve (TVBV).

BEFORE BLACK - Turbo Notes