Intake manifold construction, intercoolers

[Jörgen Karlsson]

Bruce wrote:
> Any intercooler that you use in the plenum, would either be too
> small to be
> effective, or need fluids that are really cold.  you'll also be losing the
> surface area of the piping for heat transfer.

I don't agree about the size of the intercooler, check the efficiency of the
stock syclone intecooler when it is used with a good heat exchanger and a
pump that runs all the time. All cars that I have worked with has had
problems with the pipes actually heating the charge, for me it is obvious to
use pipes that isolate the charge from the hot under hood air. Stainless
steel and plastic are my favorites.


> With the in plenum cooler,
> you also be exposing it to the heat of the manifold, thru all it
> mounts, and
> you libel to losing alot  of cooling effect to cooling the
> manifold.

I forgot to mention that, it is very important to isolate the plenum. The
plenum should be thermally isolated from the head, silicone hoses can be
used to connect the separate runners to the plenum. This will be a massive
piece and it will probably have to be removed for any work in the engine
compartment. Stainless steel runners is also a good option. Isolation of the
intake from the engine is good on all port injected cars. It is a good idea
to isolate it from the air in the engine compartment too.

As mentioned the usable plenum will start after the intercooler.

I hope this come out right:

-------------------------
TB    |IC      |         |
      |        |  \   /  |
-------------------------
                   | |
                   | |
     ______________/ /
HEAD _______________/

Jörgen


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