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Dart Machinery, LTD. stands behind each product we manufacture 100%. Each component undergoes a detailed manufacturing process that involves the hundreds of calculated and precision steps to ensure the finest quality possible.
BigChiefPro1 18 14 424cc

Big Chief PRO1 18° & 14° 424cc

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Description

Maximum Top Sportsman, Top Dragster, Pro Mod and Pro Street competition. Excellent with alcohol and nitrous, over 7,000 RPM, over 500 cubic inches.

The original Dart Big Chief put the spread port design on the map, winning three NHRA Pro Stock championships before being banned from the class.

We have applied the PRO1 design concept to the Big Chief in order to help make spread port technology more affordable for Sportsman racers. High flowing as cast ports combined with CNC machined chambers and bowls deliver awesome power.

Big Chief PRO1 18° and 14° head assemblies include hardened seats and stainless valves. Copper seats and Titanium valves are optional.

Heads are sold individually.

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Material: RMR Cast 


Aluminum Alloy

Valve Angle: 18° & 14°

Intake Port Volume: 424cc

Intake Valve: 2.400”

Exhaust Valve: 1.900”

CNC Chamber Volume: 95cc w/Ti 100cc w/SS

Intake Port Shape: Rectangle

Port Location: Spread port

Big Chief PRO1 18° 424cc – Aluminum

18474030 – Bare Head Super Mod Port 424cc 2.400/1.900 4.500

18474136 – Assembly Super Mod Port 424cc 2.400/1.900 1.625D 4.500

18475030 – Bare Head Super Mod Port 424cc 2.400/1.900 4.600

18475136 – Assembly Super Mod Port 424cc 2.400/1.900 1.625D 4.600


Big Chief PRO1 14° 424cc – Aluminum

18464030 – Bare Head Super Mod Port 424cc 2.400/1.900 4.500

18464136 – Assembly Super Mod Port 424cc 2.400/1.900 1.625D 4.500

18465030 – Bare Head Super Mod Port 424cc 2.400/1.900 4.600

18465136 – Assembly Super Mod Port 424cc 2.400/1.900 1.625D 4.600

Big Chief PRO1 18º Tech Sheet – H52

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