Wiring harness schematic SBC

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Klondike Jim
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Location: Peterscreek, Alaska

Wiring harness schematic SBC

Post by Klondike Jim »

Anyone have a good Wiring harness schematic for a SBC with carburetor. My new 383 should be showing up in the next few weeks and can’t find a good schematic for it. Have a brand new harness already here.
:alaska: 1997 18’ Alaska Airboat 383 Stroker w/ Whirlwind Stump Puller.
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Deano
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Re: Wiring harness schematic SBC

Post by Deano »

Klondike Jim wrote:
Tue Jan 05, 2021 12:53 am
Anyone have a good Wiring harness schematic for a SBC with carburetor. . . . Have a brand new harness already here.
I admit to being a dummy sometimes, and maybe haven't had enough coffee yet, but a SBC w/carb seems a little generic.
I'd think that the flavor/type of ignition system your harness is expecting would probably be helpful information. :dontknow:
"The suppression of uncomfortable ideas may be common in religion and politics,
but it is not the path to knowledge; it has no place in the endeavor of science."
- Carl Sagan
Klondike Jim
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Posts: 20
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Location: Peterscreek, Alaska

Re: Wiring harness schematic SBC

Post by Klondike Jim »

This is info I have at this time. And I am not a mechanic by any stretch. I have someone going to wire it for me but I would like to have an idea of what color goes where.

383CI /450HP MAS Performance Small Block

Specifications

Horsepower: 450 @ 5200 RPM
Torque: 480 ft/lbs @ 4400 RPM
Compression Ratio: 10:1
Block: Cast Iron 4-Bolt Main with 1-piece rear main seal
Crankshaft: Forged 4340 Steel (externally balanced)
Connecting Rods: 5.7 I Beam with ARP Bolts
Pistons: Forged Aluminum
Camshaft: Hydraulic
Rockers: 1.5:1
Cylinder Heads: Aluminum Edelbrock E-Tec 62cc chamber
Intake: Edelbrock RPM Airgap
Carburetor: QuickFuel 750cfm Mechanical Secondary
Ignition: HEI
:alaska: 1997 18’ Alaska Airboat 383 Stroker w/ Whirlwind Stump Puller.
SWAMPHUNTER45
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Re: Wiring harness schematic SBC

Post by SWAMPHUNTER45 »

If it is a GM HEI and a single wire alternator any mechanic would know the plan.

Basically you run a 30 amp power wire to the ignition switch. Then run a wire off the ignition “S” to the starter solenoid.

Then run a wire from the ignition switch (R) or (I) to the HEI.

The alternator if a 7127 single wire style you run a good (30amp) wire to the battery positive side.

Besides good ground that will get you started

It literally is that simple once you get to doing it.

Obviously gauges will add to the mix if electric and not mechanical. I prefer mechanical sans the Volt meter which is fed off the hot wire powering the primary ignition feed.
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Prototype
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Re: Wiring harness schematic SBC

Post by Prototype »

Deano wrote:
Tue Jan 05, 2021 8:01 am
Klondike Jim wrote:
Tue Jan 05, 2021 12:53 am
Anyone have a good Wiring harness schematic for a SBC with carburetor. . . . Have a brand new harness already here.
I admit to being a dummy sometimes, and maybe haven't had enough coffee yet, but a SBC w/carb seems a little generic.
I'd think that the flavor/type of ignition system your harness is expecting would probably be helpful information. :dontknow:
And I thought I had issues with 10 degree down bungs on o2 censors with the new lt1 headers per side?
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Prototype
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Re: Wiring harness schematic SBC

Post by Prototype »

Deano wrote:
Tue Jan 05, 2021 8:01 am
Klondike Jim wrote:
Tue Jan 05, 2021 12:53 am
Anyone have a good Wiring harness schematic for a SBC with carburetor. . . . Have a brand new harness already here.
I admit to being a dummy sometimes, and maybe haven't had enough coffee yet, but a SBC w/carb seems a little generic.
I'd think that the flavor/type of ignition system your harness is expecting would probably be helpful information. :dontknow:
And I thought I had issues with 10 degree down bungs on o2 censors with the new lt1 headers per side?
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