Cam Sync Plug - BBC w/ Tall Deck Block

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$405.94
MSRP: $449.95
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Info

SKU:MSD85142 ,UPC:

SKU: MSD85142

UPC: 090127106761

MPN: 85142

Info

SKU:
MSD85142
UPC:
090127106761
MPN:
85142

Description

The MSD Ignition Cam Sync Plug for BBC with Tall Deck Block is a precision oil pump drive component designed for Big Block Chevy engine builders and high-performance ignition system integrators. This hall-effect camshaft synchronization distributor plug combines pro-billet aluminum construction with a melonized gear assembly to deliver reliable cam timing signal feedback in demanding engine applications where accurate ignition timing depends on exact crankshaft-to-camshaft synchronization.

The plug features adjustable positioning to accommodate varying engine configurations and deck heights, which is critical when installing tall-deck big block Chevrolet blocks where standard distributor accessories may not align correctly. The hall-effect sensor design provides digital signal output to MSD ignition controllers and other modern engine management systems, eliminating the drift and signal degradation associated with older point-based cam sync methods. The melonized finish on the gear resists wear and corrosion during long engine run-in periods and in street or race environments where engine bay temperatures and humidity vary widely.

This component is engineered for builders working with tall-deck big block Chevy applications, stroker builds, and custom engine platforms where OEM distributor geometry cannot be used. It serves as a critical interface between the engine's mechanical cam rotation and the ignition system's digital control logic, ensuring that spark timing remains synchronized to actual cam position rather than relying on crank-only timing assumptions. Each unit is sold individually.

MSD Ignition has established credibility in performance ignition systems for nearly four decades, with particular strength in distributor-based cam sync solutions for carbureted and EFI engines. The adjustability of this plug reflects real-world builder feedback: deck height variations in big block castings and custom block work create fitment challenges that fixed designs cannot solve.

SpecificationDetail
Brand
MSD IGNITION
MPN / Part Number
85142
UPC
090127106761
SKU
MSD85142
Weight
2.9 lbs
Dimensions
8.4 x 4.6 x 12.4 in
Product Type
Oil Pump Drive – Camshaft Sync Distributor Plug
Engine Application
Big Block Chevrolet – Tall Deck Block
Sensor Type
Hall Effect
Gear Material
Aluminum with Melonized Coating
Features
Pro-Billet Construction, Adjustable Positioning
Part Number
MSD 85142
Unit Count
Sold Individually

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