School me on angled-entry intakes

[TheGraye28]

Just doing some research on the benefits of angled intake manifolds commonly seen on high horsepower turbo or NA cars. There is an interesting post on R3v with some guy making an adapter for S54 itbs here: http://www.r3vlimited.com/board/showthr ... 989&page=5

Long and short of it is that center entry manifolds such as ours on M30s are essentially flawed and will always favor certain cylinders with flow. The discussion goes over how S54 itbs would be too large for the s52 or M52, but I was thinking it might be good for our motors as they rev lower but have a greater displacement than the S54. Thoughts? I know the more common thing is to swap the M88 stuff over but this might give a second option too if a good adapter was made.

[EricF]

Same story on the Volvo redblocks, except those came factory with turbo so it was even more flawed. The Group A 240 turbo had a larger injector on cyl. no 3 to compensate...

Sheetmetal manifolds are the norm over there, a lot of care needs to be put into the design... But nobody really bothered with ITBs. It is cool to me that they are so available in the BMW world, but I would question the net benefit on a properly designed manifold.

Cool info in the other thread, I think in a boosted application the intake is a great source of extra systemic efficiency. Problem is these cars seem to make good power when boosted no matter what. Good problem to have

[mooseheadm5]

Our manifolds are actually very well balanced, both M30 and M20. Even the M50 is more balanced than they show in the oversimplified flow model in that thread.