Outside of Kei trucks, I've always found a benefit to removing the EGR system on carbureted cars. Cleans up the engine bay, less carbon build up, less vacuum lines and components to worry about, slight performance and mpg bump, etc. I'm emissions exempt so I'm not worries about that aspect. Has anyone gone through with it and was it worth it?
I deleted mine when I switched carb to cv40. Nothing to really note positive or negative, less complexity and cleaner engine bay is what I was after.
I've removed the EGR system on a few carbureted cars, and I agree with you on the benefits. It cleans up the engine bay, reduces carbon build-up, and eliminates unnecessary vacuum lines, which makes maintenance a bit simpler. If you’re going for a complete removal, an EGR delete kit is a great way to do it right. Performance and MPG can get a slight bump, especially with older carbureted engines that are prone to clogging from EGR flow. Since you're emissions are exempt, it’s a pretty straightforward modification. In my experience, it was worth it for better reliability and a cleaner engine.
From my testing, the best EGR delete setups are the ones that keep manifold pressure deltas within factory tolerances and include a proper coolant bypass to avoid localized hotspots. After deleting the EGR on my 6.7, I optimized pilot injection timing and reduced post-injection duration, which helped stabilize idle quality and cut down micro-soot accumulation. The biggest gains weren’t from the hardware but from correcting the VGT duty cycle map and boost threshold tables. I documented the entire workflow here: your link here. The engine now runs cooler under sustained load, with noticeably smoother transient response.
