MX-5 EGR Blanking
If you’re thinking about blanking the EGR (exhaust gas recirculation) valve in your track car, there are several considerations to take into account. The most common reason for EGR blanking is to improve performance, but you should also bear in mind that you’ll likely need an ECU remap to avoid Engine Management issues like engine warning lights or reduced performance.
An ECU remap after the EGR blanking mod will optimise the air-fuel ratio and ignition timing, ensuring that your engine runs perfectly with the new setup. Think of it as fine-tuning your car’s brain to handle its new lungs.
Blanking the EGR valve can unleash some serious performance potential, as well as remove soot and deposits from the MX-5 exhaust system. With an EGR blanking cap or plug on your MX-5, your engine will breathe cool, oxygen-rich air. This will generate a more efficient combustion, leading to improved throttle response and more horsepower.
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About our range of MX-5 EGR Blanking
We sell a range of EGR blanking caps, plates and kits at BOFI Racing, like the Jass Performance EGR blanking cap and the Eight Nine EGR Blanking Kit for NA & NB models.
For cars that only see road use, we wouldn’t advise blanking the EGR valve because it’s illegal to remove any of the original emissions equipment fitted in the UK—so your car could fail its MOT.
Frequently asked questions
What does an EGR valve do?
Exhaust gas recirculation (EGR) is used to reduce levels of NOx emitted by your Mazda MX-5’s engine. EGR works by routing, cooling and feeding a controlled amount of exhaust gas created during combustion back into an engine’s intake air system.
This process dilutes the air and fuel mixture that enters the combustion chambers. In doing so, it lowers the engine’s peak temperature due to the reduced amount of oxygen, which, in turn, lessens the amount of nitrous oxide formed.
How are exhaust gases cooled within the MX-5 exhaust system?
The exhaust gases can either be externally cooled and piped into the inlet manifold, or managed internally through a pipe and a valve into the manifold.
Where is the EGR valve located?
The location of the EGR valve will vary depending on the make and model of your car, but it’s typically located on or near the intake manifold. The EGR valve is the main component of the EGR system and it connects the exhaust manifold to the intake manifold.