Snowman, this has been a problem that has been realized for close to 50 years with all "siamese" port engines, its there even though you can't understand it. Dividing the port helps a lot, Tom has done this with his turbo 292.
Well I just read a little bit about it but it seems like the problem is centered around them opening at the same time like you mentioned? If they don't then what would be detrimental to performance?
69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.
