charles.harbert@fmglobal.com wrote:

Paul, all of what he says is true if you were building a race car developing
maximum power. I'm not. In a tightly confined airplane cowl, you have to
"engineer" the application to work within the confines of the available space
and take into account the other design parameters i.e. noise, heat, hp reqd,
etc.. Jeff has the same problem if he decides he needs a wastegate. There is so
little room that you "do what will work". If I was looking for 400+ hp, I would
have done it a lot differently, but I really only need about 250 hp reliably.

We could discuss the thought process that went into this actual design, but in
the end it's whether it works, or not. So far, so good, but I'll let you know
how it progresses.

Well if you get some strange boost results this could be it.

I am vacillating on the waste gate. I have plenty of room in my
cowling once I decided to integrate the intercooler with the intake
manifold and move the rad below the engine. I am now wondering what 
to do with all that room on the right
side :-) I could, I guess, lengthen the intake pipes to 24 inches or
so and run them up and over the engine to the intercooler mounted
on the right side. This might either increase the power or decrease
the BSFC due to a tuning effect. It seems to work on the stock
Turbo RX7's. 

Perhaps I will just use an air to oil cooler on the right side instead
of
a water to oil heat exchanger.

I was hopeing to talk to Bob Keller at Turbonetics today but he is
working on a big deal with Ford. Hopefully he will have some time next
week.

Paul Lamar
 
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