intake manifold modification

[OldMav]

Ok, I wouldnt be able to fit a 5 inch pipe to my manifold.... is it better to be round?

Would I be right in saying that the first major goal of manifold design should be equal flow to all cyclinders? Then chase better allround figures?

Maybe off topic a bit, but with an intake system is there a boundry layer of air and what affect can that have on design?

Cheers
Benny

Benny Your manifold is a very nice manifold and addresses the distribution component very well but the issue here is not the manifold its the air speed changes that happen when air has to change its acceleration speed so many times. For example high speed air entering the cooler then abruptly slows down to be cooled then has to speed up again to exit the cooler then slow down again as it enters the plenum. The cooler to plenum caused a backup effect when you are trying to go from high boost to low boost situations, due to the shortness of the system unlike a front mount this in my experience helps to causes surge. Even just a 4 inch pipe there does reduce this effect allowing the plenum and cooler volume to reduce this effect as a accumulator. Hence my cooler to plenum connection system. This is only my experience for fast spooling high volume turbo's like the 3071 type.