How Many Crankshafts In a V8 Engine? A complete guide.

It is the beating heart and muscle of the supercar. A V8 engine indicates that it has two engines with four cylinders in one. If the V8 comprises two four-cylinder engines in one, How Many Crankshafts In a V8 Engine?

Each V8 engine has a crankshaft. The V8 engine comprises four cylinders per side with a 900-degree angle, and is linked to one Crankshaft. The flat-plane crankshafts found in European automobiles and cross-plane crankshafts found in most muscle cars are two types commonly used in V8 engines.

Nothing is more eye-catching than a V8 roaring past you in the street. The distinctive V8 sound is why it is an absolute favorite among car enthusiasts.

V8 motors engineer supercars and Muscle cars; however, they sound and function differently. The difference between the muscle car and V8 supercars is due to the two types of crankshafts used. We’ll get into that later in the article.

The reason V8 engines have one Crankshaft

The Crankshaft of the V8 engine plays a role in changing the return motion into a rotating one. It transfers power to the rear transmission and the fan belt in the front. In the case of a V8, any crankshaft will not work since V8 engines are potent motors and require the most robust crankshaft design to handle the force it generates.

Two crankshafts on a V8 engine could mean you’d have two transmissions and need balancing engineering that isn’t sensible or financially viable.

A single point on the engine that transfers force to transmission is why V8 engines and automobiles have only one Crankshaft. The Crankshaft is the one that controls the motion of the pistons, and every crank model has a different function in the V8.

A V8 engine only has one Crankshaft; however, two types of crankshafts are generally utilized. Every kind of Crankshaft has been designed with different capabilities.

The most popular V8 crankshaft model is the cross-plane one that is found in nearly all American muscle cars, and the flat-plane one is most often used inside European V8 supercars.

The flat-plane and cross-plane crankshafts have existed for quite a while, and both are distinctive in how they contribute to the V8 engine’s design.

However, the cross-plane one is more frequently used, particularly in the United States. The cross-plane Crankshaft’s counterpart is the flat-plane Crankshaft. It is gaining popularity at the expense of a muscle car enthusiast due to its ability to rev up quickly.

It’s hard to believe that such a recognizable symbol of a motor only has one Crankshaft, but it’s real. Every V8 engine, regardless of how amazing, possesses one motor.

Are there different crankshafts available for V8 Engines?

V8 engines employ two types of crankshaft designs. Each kind of V8 crankshaft has been in use for a while. However, both are still widely utilized in their respective fields.

Manufacturers would prefer either a flat-plane or a cross-plane one in their vehicles, depending on the performance they want from the particular motor.

Here is a comparison of two kinds of crankshafts utilized in V8 engines.

Flat-Plane Crankshaft

v8 crankshaft

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Flat-plane crankshafts date back to the beginning of the automobile industry due to their simplicity. These days, flat-plane crankshafts can be used within European racing cars; however, some of the most famous American-made cars, such as the Ford Shelby GT350, still use flat-plane crankshafts.

The flat-plane crank gets its name due to its form. The crank pin journalizes on the Flat-crankshaft’s circular cylinders 1800. You can cut straight through the center points using an equilateral plane. This is the reason why it’s known as a flat-plane crank.

Cross-plane cranks have their journal for the crankpin at around 900. Moreover, you require vertical two-dimensional planes to traverse through the center.

Flat-plane crankshafts are an excellent choice for those who want to improve their bad points; they generate greater rpms, more efficient tuning, and have a great sound.

The disadvantage of a flat-plane crank is that it suffers from loud and harsh sounds and a shorter life span for the engine. Its firing sequence is unique as it is evenly fired across both banks. This gives an engine with a soft and smooth ride.

The flat-plane V8 comprises two inline four-cylinder engines connected by the Crankshaft, making it simple to move back and forth between the bank of cylinders. With the V8 crankshaft that is cross-plane, it’s impossible to move all the time between cylinder banks regardless of the firing order you choose to use.

Flat-plane V8 engines run uniformly, and when you observe the exhaust signals coming out of each cylinder, they’re timed perfectly.

Every pulse coming through the headers from the exhaust will create a vacuum that is referred to as scavenging. Scavenging is an artifact where gas from the exhaust is pulled from an additional cylinder.

Cross-Plane Crankshaft

how many crankshafts in a v8

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The cross-plane Crankshaft V8 engine’s exhaust signals are thrown into a collision and can create a negative scavenging impact. The slamming exhaust gas causes breathing difficulties for V8 engines, especially when running at high speeds.

If a V8 engine improves its speed, breathing efficiency is a major factor, and that’s why a flat-plane V8 is revved higher than a cross-plane V8 engine.

Another benefit of a flat-plane crankshaft is that all cylinders function precisely the same. If you compare the flat-plane Crankshaft and that of a cross-plane crankshaft, V8, you will notice that the cross-plane Crankshaft has less efficient crankshafts than others.

When you perform a performance tuning on a cross-plane crankshaft V8, it’s set to the lowest-performing cylinder. This means you must reduce the volume to accommodate the cylinder that cannot.

The drawback of the straight plane cranks is the sound vibrations caused by an imbalance in the second engine. Cross-plane V8 engines operate more smoothly due to engines that fire at 1000 instead of 1800 and have a smooth engine.


The V8 is a pair of four-cylinder engines, one next to the other, connected by a single crankshaft. Each V8 engine has one Crankshaft since using more than one is inconvenient and hard to operate.

The V8 engine has a single crankshaft; V8s are running with a cross-plane crankshaft predominantly in the USA, and other V8 engines using the flat-plane Crankshaft are prevalent in Europe.

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