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EGR is not required to control combustion temp. I’ve been building motors and competing in Motorsport all my life, never used EGR and my temps are great. It’s
by MarkMarine 2y ago
EGR is not required to control combustion temp. I’ve been building motors and competing in Motorsport all my life, never used EGR and my temps are great.
It’s for emissions and on a diesel, injects soot into the intake
- arghwhat 2y agoIt injects a small amount of gas that came from the cylinder back into the cylinder - nothing that doesn't belong in a cylinder. The only source of extra gunk and buildup is the oil droplets or outright drooling pulled in by the PCV. The reason you never used an EGR is because you're building for motorsport - you don't care that your cylinders are too hot for too long when you release the throttle. You care about what happens at or near peak power, and even if you had an EGR it would be fully closed, so why bother. Note that it's for any combustion engine, not just diesel.
- MarkMarine 2y agoIt injects exhaust. Burned fuel air with NOx, CO, CO2, and very little oxygen. It does this to lower in cylinder combustion temp and reduce the formation of NOx. Less oxygen in the cylinder means less temp which means less power. That is just a fact, it’s thermodynamic law, you literally can’t dispute it. The only Motorsport engines built for full throttle only are drag and pull engines, but where I race throttle response and the whole torque curve from 8,000 to 16,500 RPM is incredibly important. Find me an EGR system on any purpose built engine that didn’t have to comply with emissions. Industrial engines, race engines, tractors, generators… anything. That should illuminate what EGR is actually for.