This is from the Spearco catalog.
(818) 901 7851
fax (818) 785 4362
http://spearcointercoolers.com
email:spearco@aol.com

Generally speaking the bigger the intercooler the better.
The trick is finding the most efficient/size ratio.
Corky Bell mentions this in his book.
This cooler has a lot of short combustion air channels
running in parallel so the combustion air pressure drop
is real low for a 13B 2.6 L engine at about .3 PSI.
Heat TX efficiency is about 83% for 20 MPH air going
through the core.

The lower curve is the pressure drop curve as a function
of engine size. The upper curves are the heat TX eff. curves.

This cooler is 3.5 by 18.48 by 6 inches. I don't have a
weight for it however. You can have it in all sorts of 
inlet/outlet configurations.

We also don't have data for the cooling air pressure 
drop at 20 MPH. A properly designed cooling air intake 
diffuser is called for to get the 220 MPH  air slowed 
down to 20 MPH efficiently to go through the cooler.

Model #2-172 also looks pretty good too but the form factor is
not good for my application being 10 by 10 by 3.5.

I suspect a custom 2.5 inch thick larger area core would
be more eff. in terms of cooling air pressure drop just
as thinner water radiators are better in this regard.
One would not want to go thinner as the intake and exhaust
pipe diameter is around 2.5 inches.

BTW as far as the waste gate configuration is concerned;
things like that are very difficult to model and I would
go with Corky Bell's 25 years of expierence installing
turbo chargers on cars and airplanes.
 
Paul Lamar
 
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