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Holley 750 Manifold & Ported Vacuum Connections

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  • Holley 750 Manifold & Ported Vacuum Connections

    Can somebody verify for me the straight manifold and ported vacuum connections on my Holley 750 vacuum secondaries carb. I currently have the distributor advance hooked up to the port that is on the front lower left hand side at the base. The other connection is on the left hand side higher up on the base which I currently have my vacuum modulator on the transmission hooked up to but plan to change that to a straight manifold vacuum connection. Turning the picture you can see where the distributor advance hose is going in.

    Carousel72TRed
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    Last edited by Carousel72TRed; 10-22-2021, 09:19 AM.

  • #2
    The full manifold vacuum port has vacuum at idle and part throttle. The ported (timed) vacuum port does not have vacuum at idle, part throttle only.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 block, forged steel crank & rods, forged pistons, Trick Flow T/W 11R 205 CNC comp ported heads, 12:1 comp ratio, 232-244 duration/.623" lift/114 LSA camshaft, TFS R-Series FTI comp ported intake, BBK 80mm T/B, Holley Dominator MPFI & DIS, Holley 36-1 crank trigger, MSD 1x cam sync, PA PMGR starter, PA 200A 3G alternator, Optima Red battery, 100HP progressive dry direct-port NOS, R134a A/C, Spal dual 12" fans, Frostbite 3-core aluminum radiator, Pypes dual 2.5" exhaust, off-road X-pipe, shorty headers, Earl's -6AN fuel system plumbing, Walbro 255 LPH in-tank pump & Pro-M -6AN hanger, S&W subframe connectors, BMR upper & lower torque box reinforcements, LenTech Strip Terminator wide-ratio AOD, 3000 RPM C6 converter, B&M Hammer shifter, Stifflers transmission crossmember & driveshaft safety loop, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

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