Best Camshaft for 4.3 Mercruiser

Those looking for the ideal component to help them increase the performance of their vehicles can opt for the best camshaft. Using the Best Cam for 4.3 Mercruiser can make the vehicle do its job better and benefit combustion engines. Camshafts are usually used to operate poppet valves, and although many people are not familiar with this product, it is of utmost importance.

You must be aware that not all camshafts can serve the same purpose, regardless of the model and type of vehicle you have. The use of an unsuitable camshaft can weaken the vehicle and cause uncomfortable failures. If you have no idea what this product is, as you read this article, you will have a basic notion about the Best Cam for 4.3 Mercruiser.

Are you a 4.3 Mercruiser user? If this is the case, you can get the four best options currently for your vehicle in this article. It is recommended that you get the Best Cam for 4.3 Mercruiser to have the correct life, lift, RPM, and lube clearance. If you find yourself excited and ready to buy this product and choose the best one, this article is the right place for you.

With thousands of products available on the market worldwide, the task of choosing a camshaft can become complicated. But you don’t have to worry about this anymore.

Best Camshafts for 4.3 Mercruiser Reviews 2021

Best Camshaft for 4.3 Mercruiser

This article will provide you with one of the best reviews on camshafts along with their most representative characteristics. Here you can get an ideal buying guide about the four best current options considered the Best Cam for 4.3 Mercruiser.

1. COMP Cams 12-230-2 XE250H-10

Each of COMP’s camshafts is very well manufactured so that these products can have a much tighter tolerance. This cam model is no exception; It is intended for Chevrolet and small block engines with a flat tappet cam. It is very rigorously tested and verified to ensure complete quality in this ideal vehicle product.

Quick-release lobe profiles can give your vehicle more responsiveness and area under the lift curve. The higher vacuum allows increased runtimes to improve performance fully and also aids in braking on stems. This cam also offers excellent performance in street carburetor applications and intake manifolds (Chevrolet engines).


  • Engine family: Chevrolet 262-400 c.i / 8 cylinders (1958 – 1998)
  • Operating range (RPM): 1,300 – 5,600
  • Series: Xtreme Energy
  • Gear accessory: 3 bolts
  • Material: cast iron
  • Duration of announced admission: 262
  • Advertised escape duration: 270
  • Intake Duration at 0.050 inch lift: 218
  • Exhaust Duration at .050 inch lift: 224
  • Intake valve lift: 0.462
  • Lobe separation: 110
  • Central intake line: 106


  • Offers great performance to brand vehicles
  • It is backed by a warranty from the manufacturer
  • Helps improve vehicles


  • Surfaces can suffer from oxidation
  • Lack of valve springs and lubricant in the assembly
  • Very small and non-functional lobe for a mechanical fuel pump

This product will be the most ideal if you are looking for a good cam for daily use and towing without sacrificing much mileage. It contains a good chamber to wake up an SBC 350, a good vacuum to brake, and the responses are smooth and powerful. This cam is very nice, and its presentation is the best on the market (it includes funny stickers).

2. Elgin E-1840-P Camshaft

This Elgin camshaft is an excellent product with high performance and is designed and manufactured to fit Chevy models. All Chevy model vehicles manufactured from 1997 onwards can have this camshaft without any problem. This product is a hydraulic roller-type camshaft that can work together with an LS1 engine and have no novelties or drawbacks.

This camshaft contains a wide operating range that goes from 2,200 to 5,400 revolutions per minute and reaches its maximum performance within this range. As far as the product’s functionality is concerned, it gets to work very fairly for the idle state. It’s excellently good for the midrange and strong for high-end powers; furthermore, its intake valve lift is 0.585 inches.


  • Manufacturer and brand: Elgin
  • Intended for Chevy 1997 onwards
  • Engine: LS series
  • RPM range: 2,200 to 5,400
  • Cam gear attachment: 3 bolts
  • Lobe Separation: 112 degrees
  • Centerline inlet: 108 degrees
  • Valve lift: 0.585 inches (for intake and exhaust)
  • Roller type: hydraulic
  • Duration announced: 283/286
  • Duration at lift: 0.050 inches 228/230
  • Weight: 9.16 pounds


  • There are no problems with the support of the power brakes
  • Installation is extremely easy
  • The shipments of this product are very fast


  • The finish of the lobes is usually not of good quality
  • Does not contain a specification sheet

Generally speaking, this product that comes with some amazing attributes and very decent specs may be a good option these days. Although it is best used for three-bolt cam gears, it is not entirely suitable for Active Fuel Management or DOD use. Its shipment by the manufacturer is through a kit that includes everything you need to get started with this product and your vehicle.

3. Cams 20-744-9 XE

This COMP camshaft employs the latest cam technology that helps to provide cars with maximum performance (general manufacturer characteristic). It does not matter if it is an SUV, trailer, or simple car. Xtreme Energy always has an ideal cam available that allows a greater car operation. For those using a very aggressive lobe profile, this 20-744-9 XE cam will deliver a better throttle response and more horsepower.

It is made in the USA and fits Chrysler 273-360; it perfectly complements this type of vehicle. This type of camshaft has the peculiarity that it is fully designed for vehicles currently controlled by computers. The opening lobe profiles on this camshaft are much faster, and it also provides greater responsiveness.


  • Brand: COMP Cams
  • Product line: Xtreme Energy Camshafts
  • Cam Style: Hydraulic Roller Tappet
  • Use of the camshaft: street
  • RPM range (basic operation): 700 – 4,800
  • Intake Duration at 050 inches of lift: 206
  • Exhaust Duration at 050 inches of elevation: 212
  • Duration of intake advertised: 258
  • Advertised duration of the leak: 264
  • Lobe Spacing (degrees): 112
  • Weight: 8.9 pounds
  • Grind number: CRS XR258R-12


  • It is a super-strong product (cam torque 318)
  • Works great with the standard ECM tune
  • Contains a stable operating range


  • There may be a little more potential in the melody
  • Idle has some trotting and shaking
  • Valve springs must be updated

It is an excellent product manufactured in the United States with stainless material that guarantees long life. It is available in the market for a slightly high price, but those who have the money to solve their emergency can get it. The entire Xtreme Energy Camshafts product line is proven to be the best, with groundbreaking updates every year.

4. COMP Cams 12-214-4

It is designed for street or hot strip cars; cams belonging to this line (COMP cams magnum) require a type of compression ratio. In addition, they also require a much higher rear gear ratio and stall torque converter than stock. The profile of this camshaft is very aggressive, and they provide maximum high-end performance for cars so that they can have a high performance.

This product is available in the market and includes very functional and comfortable cams and lifters for the buyer. Hydraulic flat tappet is for 58-98 inch 262-400 cid small block engines. All those street machines that need a camshaft, this model of the COMP line is the most ideal, perfect, and extremely affordable.


  • Operating range (RPM): 2,000 – 6,000
  • Product use: for the street and performance
  • Valve springs required: yes, they need
  • Admission duration announced: 280
  • Advertised escape duration: 280
  • Intake Duration at 0.050-inch lift: 230
  • Exhaust duration at .050 inch lift: 230
  • Intake valve lift: 0.48
  • Exhaust valve lift: 0.48
  • Lobe separation: 110
  • Weight: 13.4 pounds
  • Cam style: flat hydraulic tappet


  • Includes a cam kit, lifters, mounting lubricant, instructions, and stickers
  • Allows for a large cam for a stock engine
  • It is a great sound chamber


  • The building metal of this product may be a little soft.
  • It can generate massive failures if the softness of the material is not detected in advance

It represents a simple and inexpensive option found on the market for various types of street vehicles. If you want an amazing RPM, this model may be the perfect choice with its basic performance of 2,000 – 6,000.

Benefits of Using Cam

Camshafts are essential parts that all vehicles must have as they control various parts of the vehicle (including the intake and exhaust valves). If you want to have a much more powerful engine for your vehicle, you will need to have a suitable and ideal camshaft on hand. It may seem like an extremely easy task to choose a camshaft from the wide variety of options currently on the market, but it is not.

Many factors must consider before choosing the Best Cam for 4.3 Mercruiser to enjoy all its benefits. Next, you will be able to know what the camshafts offer the most important benefits in 4.3 Mercruiser:

1. Roller Cams / Flat Pusher

People looking to get a camshaft can always have the advantage of choosing a flat tappet or roller cams. They both have some features that differentiate them, and of course, they can offer some advantages or disadvantages to cars. On the one hand, flat camshafts can provide a slightly curved riser and bottom; roller cams use lifters, wheels, or a roller.

When it comes to comparing both options in terms of power production, the roller cam produces the most power. That is one of the reasons why the vast majority of original equipment manufacturers in the world use this type of cam for their engines.

2. Duration

Camshaft life is the amount of time the product opens and keeps the valve off the seat until it is finished closing. The elevation of the camshafts allows determining the total area of ​​an open valve and, the time is measured in degrees of rotation of the crank.

Some camshafts range from 220 to 280 degrees (they can even exceed these degrees on some occasions). Longer durations equate to a greater high power range.

3. Lobe Separation

This area between the intake lobe and exhaust points of maximum lift is generally measured in degrees. When a narrow lobe separation occurs, it typically ranges from 104 to 108 degrees; this narrow delivers low to mid-range production.

One benefit lobe gaps offer when the lobe gaps are too narrow, and at 0 degrees, the intake and exhaust valves will close. Another benefit of the wide lobe gaps is the much higher RPM range.

4. Operating Range (RPM)

Obtaining the camshafts must be by the structure and parts of the vehicle. If the vehicles have a smaller duration number, the higher RPM powers will go lower. Camshafts are best suited for everyday drivers, stock replacements, and towing applications.


  • How much power can you get from a 4.3 MerCruiser?

The 4.3 MerCruiser is an excellent engine as it is very inexpensive to buy, easy to operate, and parts are ubiquitous. This engine comes to offer some powers depending on the models you decide to buy in the market. If it is the 4.3 TKS, they are about 190 CV, and if it is the 4.3 MPI, they are 220 CV; the standard 190 HP 4.3 delivers around 45-50 MPH.

The 4.3 220 HP is capable of delivering about 50-55 MPH. Using this motor at around 220 HP will ensure great performance. However, the 190 HP is also capable of running smoothly.

  • How much horsepower does a MerCruiser 4.3 V6 have?

This 262 cubic inches V6 engine (allows 4.3 liters) can deliver about 220 horsepower (HP). It has a 9.4: 1 compression ratio and runs comfortably on 87 octane gasoline.

  • How many hours does a MerCruiser 4.3 last?

The average life of this engine cooled by raw water is around 1,000-1,500 hours or even less, depending on the frequency of use. This engine must be well maintained so that the hours can be kept in the mid-life range.

  • Is the MerCruiser 4.3 a good engine?

This engine makes good economic sense on infrequent sports cruisers. This type of engine that runs on gasoline does not present major drawbacks as long as it is well maintained and cared for.


Choosing the Best Cam for 4.3 Mercruiser can be a daunting task for some, but getting the ideal information will make it an easier process. Due to many options in the market, the great question arises: which is the best? This article can help you choose between the four main camshafts of 2021 by reviewing features and specifications.

If you find yourself desperate for a camshaft that suits your needs and preferences, take a look at this article with confidence. Here, you can visualize these four models’ negative and positive aspects that may be an excellent option for you. Read more guides any time as well.

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