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Re: S4 head

Todd Candey writes:
>      I know everyone will think "what the __________", but, how much 
>      different is the 20 valve head used on the S4 than the 10v turbo head. 
>      Yeah, 10 valves I know. What I mean is, things like location of oil 
>      passages, bolt pattern,, etc. What are the chances of the S4 head 
>      working on any other 5 cyl block? Like the MC motors for example. If 
>      it was a direct swap, would'nt that provide for a lot more tunings 
>      options (read POWER) than the 10v motors?

The head-to-block passages should match up, but the problem with such
a conversion is plumbing.  The 20V head is a cross-flow head, so that
means the intake manifold attaches on the opposite side than those
on the 10V.

Moreover, the 20V manifold may interfere with other components in
the 10V car, such as the ABS pressure modulator.

The factory 20V normally-aspirated models has the manifold "fold
back" onto the other side over the top of the engine, and the turbo
models simply have the intake on the other side and feeds in from
the intercooler.  The plumbing to connect the fuel injection air flow
meter to the throttle body is vastly different on the 20V cars, as are
the throttle linkage.  The bottom line is, you'll either have to buy
all the 20V plumbing and bracketry, or fabricate them.  The first
approach is expensive, the second approach more difficult.  Just how
much do you want to spend and how much effort do you want to put into
such a swap?

A better way to do this is to buy the full 20V engine with all its
ancillaries, including fuel injection, wire harness, all accessories
computer, plumbing and all bracketry.  Swap the whole thing in.
This may be easier.

Perhaps an even better way to 20V power is to buy a 20V car.

-Ti
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