Unhappy 360 (At idle)
A properly functioning EGR valve is no big thing. People get their underwear all balled up about it, because of it's status as a pollution device.
But our first generation devices, after 1973, were so well controlled and of such modest capability, that as long as they were working, you would never know they were there.
If you think about they do, and you might think about if you can put something into your 8/1 chamber that occupies space, but does not contribute to combustion, you know like the 79% non-oxygen molecules that gets inhaled together with the 21% oxygen, during every intake cycle; How can you make use of that?
Big cams have built in EGR, and it's worst at idle and low-rpm, far in excess of what those little intake mounted devices could ever do. Nobody ever pulls their big-cam EGR bumpsticks out, complaining about it. lol.
I wouldn't build an engine for use with EGR, but I wouldn't lose sleep over it , if my engine had an EGR system already on it.
One thing about defeating the existing EGR valve is that the hot under carb passage is still there, and if you take the intake off, flip it over and remove the splash-shield, that cavity is usually filled with coked-up oil. My guess is that it is acting like a heat transfer material, and to some degree cooking the A/F charge as it moves on by.
A properly functioning EGR valve is no big thing. People get their underwear all balled up about it, because of it's status as a pollution device.
But our first generation devices, after 1973, were so well controlled and of such modest capability, that as long as they were working, you would never know they were there.
If you think about they do, and you might think about if you can put something into your 8/1 chamber that occupies space, but does not contribute to combustion, you know like the 79% non-oxygen molecules that gets inhaled together with the 21% oxygen, during every intake cycle; How can you make use of that?
Big cams have built in EGR, and it's worst at idle and low-rpm, far in excess of what those little intake mounted devices could ever do. Nobody ever pulls their big-cam EGR bumpsticks out, complaining about it. lol.
I wouldn't build an engine for use with EGR, but I wouldn't lose sleep over it , if my engine had an EGR system already on it.
One thing about defeating the existing EGR valve is that the hot under carb passage is still there, and if you take the intake off, flip it over and remove the splash-shield, that cavity is usually filled with coked-up oil. My guess is that it is acting like a heat transfer material, and to some degree cooking the A/F charge as it moves on by.