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Re: cracked 2-piece manifold for MC...
Phil Payne wrote:
> Yes, but should you? Is the smaller 'common' gallery handling two
> cylinders that are 'far apart' in the firing sequence? I think there's
> something clever tucked away in Audi's otherwise overly complex design.
< I'm not so sure ... based upon the papers I've read about "pulse-converter
< theory," it appears Audi put packaging above performance. It's
< to observe how they interconnect the cylinders on their non-turbo motors
< compared to the turbo motors ... in theory, they should be treated the
< but Audi does anything but.
< I think if I were ever to build a custom manifold, I'd use the 4kq
< but mount the turbo on the opposite side, like Porsche did with the 944
< but that's a rainy day project and I live in the desert so don't hold your
Have you looked at the stock manifold on other 5-cyl? How about the normally
aspirated 20v? The '91 200q20v, or the urS4/S6 (same manifold), or the
reworked RS2 manifold? They might give you some guidance, as it's likely
they've been run through a few flow benches. Plenty of room on those cars
for different setups on the exhaust manifold...
I could shoot some pictures off a loose urS4 exhaust manifold if that would
help...uses the same turbo as your 200, so you'd think the principals used in
design would be usefull...
chris miller, windham nh, firstname.lastname@example.org
'91 200q20v ==> http://members.aol.com/c1j1miller/index.html