DIY Modifications To Avoid On Your Cummins 6.7 Performance Engine

Posted on: 7 October 2022

A high-performance engine has been modified to increase its power output, typically for racing purposes –– although some people do it to their daily driver. The Cummins performance engine is a modified version of the original Cummins engine, which was first used in Dodge trucks.

The Cummins performance engine is more powerful than the stock engine, and it can give your truck a significant boost in power. However, there are some DIY modifications that you should avoid if you have a Cummins performance engine. Read on to learn more.

Increasing the Turbo Boost Pressure 

The Cummins performance engine is designed to run at a higher turbo boost pressure than the stock engine. But increasing the turbo boost pressure can actually damage your engine.

If you increase the turbo boost pressure, you will need to upgrade the intercooler and fuel system to handle the increased airflow. These components are expensive, and they can cause damage to your engine if they are not installed correctly. For example, if you upgrade the intercooler but don't upgrade the fuel system, you can damage your engine by running too lean.

Additionally, increasing the turbo boost pressure can sometimes cause the engine to run hotter. This can lead to an engine knock, something that you might not be able to identify until it's too late.

If you're looking to increase the power of your Cummins performance engine, there are other simple ways to do it that don't involve increasing the turbo boost pressure. So, avoid this modification unless you're an experienced mechanic who knows exactly what you're doing.

Install Aftermarket Camshafts

Installing aftermarket camshafts is another popular modification people make to their Cummins performance engine. However, this modification can also cause damage to your engine.

Aftermarket camshafts are designed to increase the lift and duration of the valves. This can lead to an increase in power, but it can also cause valve float. Valve float is when the valves are not properly seated in their seats, and they can actually bounce off of these seats. This can cause severe damage to your engine and can even cause your engine to seize up.

Additionally, aftermarket camshafts can also cause premature wear on your valvetrain components. These components are expensive to replace, and if they fail, there could be extra damage to your engine. So, it's best to avoid this DIY modification if you want to keep your Cummins performance engine in good shape.

Talk to an experienced engine service professional before making any changes to your Cummins 6.7 performance engine. They can help you find the right parts and make sure they're installed correctly. This way, you can get your engine to crank out even more power while still ensuring better longevity.