400 Pontiac Firing Order 【With Diagram】

You can check out the firing order for 400 Pontiac written below. We have included the firing orders of other similar engines as well including the 18436572 firing order and Pontiac 400 distributor install. Note that this sequence has been tested for the 400 Pontiac by our team.

This firing order will help you set the correct sequence of ignition so you face no problems in the future.

400 Pontiac Firing Order

  • The Firing Order for 400 Pontiac is 1-8-4-3-6-5-7-2
  • For the V8 Engine, the Firing Order is 1-8-4-3-6-5-7-2

400 Pontiac Firing Order Diagram

To maintain optimal combustion and engine performance, the firing order diagram for a 400 Pontiac V8 engine normally follows a set order. A 400 Pontiac engine fires in the following order: 1-8-4-3-6-5-7-2. Accordingly, the first (cylinder with the number 1), the eighth, the fourth, third, sixth, fifth, seventh, and ultimately the second cylinder all ignite.

By spreading the power strokes throughout the cylinders equally, this firing order contributes to the engine’s balance and smooth running. The manufacturer or service handbook for the car should be consulted if you want to find out the precise firing order diagram for a given 400 Pontiac engine.

Firing Order Applies To

The 1-8-4-3-6-5-7-2 firing order applies to Pontiac, such as:

  • Pontiac 400 V8
  • Pontiac 455 V8
  • Pontiac 428 V8
  • Pontiac 389 V8
  • Pontiac 350 V8

Torque Specifications

Vehicle NameHorsepower/RPM Torque/RPM
2021 Chevrolet Corvette

490@6,450 rpm
470@5,150 rpm
2021 Ford Mustang310@5,500 rpm350@3,000 rpm
2010 Dodge Charger178@5,500 rpm190@4,000 rpm

How Much Horsepower Does a 400 Pontiac Engine Have?

A 400 Pontiac engine’s output of horsepower might change based on the model, upgrades, and tuning. Depending on the year and configuration, a 400 Pontiac engine’s standard output ranged from 220 to 350 horsepower. The horsepower output of a 400 Pontiac engine can be greatly increased, though, with aftermarket alterations and performance improvements.

What is the Most Powerful Pontiac Engine?

The 455 Super Duty V8 was the most potent production Pontiac engine ever made. It was first offered in a few Pontiac models in 1973. With reinforced internals, big valves, and a high-lift camshaft, it had a high-performance design. The highest output in its most potent models was between 310 and 370 horsepower, though the horsepower ratings changed over time.

The 455 Super Duty was the most potent Pontiac engine and was renowned for its tremendous torque and performance.

What is the Bore Size of the Pontiac 400?

A Pontiac 400 engine’s standard bore measures 4.120 inches (104.65 mm). The diameter of the cylinders in the engine block is the subject of this measurement. It is significant to remember that engine blocks can be reconstructed or given performance upgrades by being overbored or machined to a greater size. To allow bigger pistons and rings in these situations, the bore size may be extended above the usual dimension.

Check out 3 Cylinder Engine Firing Order

Engines with Similar Firing Orders

  • Chevrolet Corvette
  • Chevrolet Camaro
  • Ford Mustang
  • Dodge Charger
  • GMC Sierra/Chevrolet Silverado

Jake Mayock