File only service. Dealer Portal Login. Remapping tools. New Genius New Trasdata Autotuner. Tuning services. Tuning Info. Services explained. Tuning talk. Instagram Facebook YouTube. What is EGR? How does an E GR work? Is it legal to remove an EGR? What are my options? Back to Services explained. Previous Next. Unfortunately, there is a huge misunderstanding about it's function circulating around the internet and sadly a lot of folks have actually removed it in the search for "free power.
The EGR valve is not simply about re-burning exhaust gasses to try to clean up the emissions. In fact, it's more about saving fuel and as a side effect, reducing emissions. In essence it "shrinks" your combustion chamber when the need for power is low. It has absolutely 0 effect on WOT performance and I'll explain why in this article as well as tell you how clever this little valve really is. The EGR valve does not open under heavy load I am unaware of any exceptions and therefore, you will not be burning exhaust gasses while at wide open throttle.
In reality, the valve opens at small throttle openings and in closed throttle situation to help fill the cylinders that are hungry for air but aren't getting any due to the throttle being in the way.
It is true that the EGR recycles exhaust gas through the engine and those gasses are less than optimum for combustion. However, at low throttle angles your engine isn't struggling to make power so much as it is struggling to work against the vacuum being created by the pistons traveling up and down the bore.
What do I mean? Well, if you've ever played with a syringe, you know that if you pull back on the plunger that it's very easy to do. However, if you block off the end and try to pull on the plunger, it's much harder to pull back. This is an easy way to think about what are called "pumping losses. Pumping loss is wasted energy caused by the throttle being closed or partially close dmost of the time. This leads into the next point, which is increased fuel efficiency.
Your engine now has to work less hard to deliver the same amount of power, burning less fuel in the process. Finally, your engine is going to have a longer lifespan. Soot deposited within the engine stresses the system and causes parts to wear down faster. Interested in learning more about what performance parts can do for your vehicle? Contact the team at Park Muffler today! Fill out this form to receive our newsletter with the latest news and promotions.
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