Dragonbat13
Well-Known Member
OK,
Everybody hates the EGR valve and I cant understand why. I plan on utilizing one in my street build if possible.
Here is what I have always understood was the two reasons behind having it in the first place,
1. Gas Milage. When your cruising at part throttle, the EGR is open. It allows inert burnt exhaust gas back into the intake under the carb. This inert gas is used in the combustion process to make up for the lack of airflow at part throttle. This in turn raises the cylinder pressures and makes more mid throttle power.
2. Prevents Detonation. Even though its exhaust gas, its still alot cooler than the combustion chamber at part throttle. It lowers the combustion chamber tempatures and avoids detonation. (This actually proved itself to me when I built a performance toyota 22r engine. The engine would detonate at part throttle cruise speeds if the EGR was dissabled.)
Now those two reasons seem like pretty darn good reasons to keep it if you ask me. Not only that, but under WOT the EGR should be shut off, same as if it were dissabled/blocked off. So why does it always seem to get blocked off all together with plates and plugs?
Is there something I am missing?
Everybody hates the EGR valve and I cant understand why. I plan on utilizing one in my street build if possible.
Here is what I have always understood was the two reasons behind having it in the first place,
1. Gas Milage. When your cruising at part throttle, the EGR is open. It allows inert burnt exhaust gas back into the intake under the carb. This inert gas is used in the combustion process to make up for the lack of airflow at part throttle. This in turn raises the cylinder pressures and makes more mid throttle power.
2. Prevents Detonation. Even though its exhaust gas, its still alot cooler than the combustion chamber at part throttle. It lowers the combustion chamber tempatures and avoids detonation. (This actually proved itself to me when I built a performance toyota 22r engine. The engine would detonate at part throttle cruise speeds if the EGR was dissabled.)
Now those two reasons seem like pretty darn good reasons to keep it if you ask me. Not only that, but under WOT the EGR should be shut off, same as if it were dissabled/blocked off. So why does it always seem to get blocked off all together with plates and plugs?
Is there something I am missing?