Proposed Tri-Power Vacuum Setup
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Instructor
Joined: Sep 2003
Posts: 166
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From: Las Vegas NV
Proposed Tri-Power Vacuum Setup
I am looking for Feedback on the proposed Vacuum setup on Tri-power 69 Corvette. I don’t want to shoot myself in the foot so to speak.
I am doing a complete Body-Off rebuild that will be a nostalgic looking Pro-touring Resto-Mod.
Drive train: ZZ454 crate motor with 69 oval port Tri-power and Tremec 5 speed OD
Hood: Long L88
Head Lights: Electronic pop up headlights
AC: Vintage Air
I am in the process of getting the engine completed (Tri-power & accessories). My goal is to have all the components ready before I take the gutted car to the painter where the body will be removed. I will then have 6 weeks to get the chassis painted and a complete rolling chassis (with drive train installed) ready for the body to be installed.
I would appreciate any feedback on the proposed vacuum setup below, because the car was originally a 427 390hp Quad carb. Also I am deleting much of the vacuum components and I would like to avoid making a mistake.
Proposed Tri-Power Vacuum Setup
I have consider the following Vacuum components:
Scenario# 1:
Scenario# 2:
TIA for any comments or feedback
I am doing a complete Body-Off rebuild that will be a nostalgic looking Pro-touring Resto-Mod.
Drive train: ZZ454 crate motor with 69 oval port Tri-power and Tremec 5 speed OD
Hood: Long L88
Head Lights: Electronic pop up headlights
AC: Vintage Air
I am in the process of getting the engine completed (Tri-power & accessories). My goal is to have all the components ready before I take the gutted car to the painter where the body will be removed. I will then have 6 weeks to get the chassis painted and a complete rolling chassis (with drive train installed) ready for the body to be installed.
I would appreciate any feedback on the proposed vacuum setup below, because the car was originally a 427 390hp Quad carb. Also I am deleting much of the vacuum components and I would like to avoid making a mistake.
Proposed Tri-Power Vacuum Setup
I have consider the following Vacuum components:
- Distributor advance (revised vacuum source)
- Headlights (converted to electric)
- Windshield wiper door (eliminated by Long L88 hood)
- A/C (not sure if vacuum is needed for Vintage Air)
- Power brake booster (stock vacuum source planned)
- Vacuum reservoir tank (don’t need any more?)
Scenario# 1:
- Vacuum Link all 3 carbs at ports (A) using T connector
- Vacuum hose (B) already installed out of the box from Holley (leave as is)
- Cap Vacuum port (C) on bottom side of Ctr carb (original Dist Adv ported vacuum source)
- Install PVC hose to port (D) note: do not have nipple fiiting / will make from 3/8" OD alum tubing
- Run Distributor advance off of Vacuum Port (E) at rear of intake manifold.
- Install Pwr Brake hose to 3/8" port (E)
- Do Not Install Vacuum Reservoir Box back onto car
- Set initial timing (engine off at 4* BTDC)
Scenario# 2:
- Same as scenario# 1 except
- Run Distributor advance off of Ctr carb ported vacuum source (C).
- Cap unused Vacuum port (E) at rear of intake manifold.
TIA for any comments or feedback
