Re: Audi throttle body...

[drew <drew@dyermaker.cs.uoguelph.ca>]

There must be something different about the Pickup manifold from that
vintage... it's simply listed as "No longer available."  So it may have
been a restrictive manifold, although to what end I'm not sure.  Later
models followed the application notes in my previous posting.  You would
know the good 4-2-1 clip-on, as it looks very similar to the dual-port
when viewed from above - it's the same crossover style.  You can see a
picture of it if you have Greg Raven's watercooled performance book - I
believe he refers to it as a late model A1 manifold...? The flange gasket
is the same as all VW clip-ons, but the actually inside diameter of the
outlet is much larger than the boat anchor's outlet.

Personally I like the C-clips, as in our lattitude they are much easier to
work with after years of accumulated rust and corrosion.  I use the wedge
installation as outlined in the Bentley, and have no problems with removal
or installation.  It's a much faster system to R&R, and provides better
isolation from vibration for the exhaust system than does the bolted
flange and flex pipe - a must for diesels...  But I expect if I lived
somewhere where rocksalt was nothing more than a bad dream, I'd prefer the
bolt on flanges too... :)

...Drew

On Thu, 6 Apr 2000, Kevin Stoddard wrote:

> You could be right about the flow rates, I'm certainly no authority on
> those things, and it's been way too many years since I took Fluid
> Mechanics.  So if someone is looking for a good manifold they probably
> oughta pay attention to the year models you cited.  I can assure you that
> diameter of the opening in the manifold that came off of my '82 Caddy is
> only slightly larger than one of the outlet holes in the 4 into 2 that I
> got off a wrecked '70s rabbit,... like maybe 1/8" larger ID, but only one
> opening instead of two.  It must be one othe "not-preferred" models.  The
> main reason I don't like them is the C clips.  The engineer that came up
> with those should be sued for malpractice.  They are a major PITB to work
> with, even if you have the special tool.  Probably a cost cutting/ease of
> manufacturing thing,... like leaving the clips out of some of the 5-speed
> CR transmissions.  Cheaper isn't always better, huh?
> Just my opinion.
> -kevin in Texas

Drew MacPherson, Network Analyst, University of Guelph

drew@dyermaker.cs.uoguelph.ca           |  visit the Massey-Harris page:
http://dyermaker.cs.uoguelph.ca/~drew   |  http://m-h.cs.uoguelph.ca


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