Re: cracked 2-piece manifold for MC...

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <63525b00.25098791@aol.com> OorQue@aol.com writes:

> I have in my garage four stock one-piece EMs, a one-piece EM that has been
> Extrude Hone'd (this was formerly Ben Howell's Ur-Q manifold) and a ported
> two-piece EM.  I have also done a limited amount of flowbench testing on
> these EMs but have some doubts about its relevance.  For a start, it's pretty
> hard to arrange to flow air through all five ports at the same time; also,
> because these are designed according to pulse-converter theory, testing them
> by themselves (instead of with a turbo on one end and a cylinder head on the
> other) may not allow them to function properly.  This is especially true when
> trying to determine the performance benefits of such things as ceramic-coated
> ports, etc.

Absolutely agree.

One of the major design differences between the Audi and Dialynx
manifold is that the Audi (one-piece) manifold leads the ports to the
turbo via three galleries - the Dialynx manifold is just a single cavity
emptying all the ports into the turbo.

--
 Phil Payne
 UK Audi quattro Owners Club
 Phone: 0385 302803   Fax: 0870 0883933