John Slade wrote:

Wonderful to find out I will not need a muffler on my turbo.

This J pipe solution made me stop and think. It gets the exhaust heat out of
the way FAST. The turbo is DESIGNED to absorb the pulses without a splitter.
Perhaps we're going against the grain trying to make a muffler to handle the
exhaust. Greg tells me his turbo represents a net weight savings compared
with a muffler & pipes. He also tells me he can turn a 300HP prop at 2800
rpm + and his take off roll is about 200 ft. The web site says he's using a
TO-4 turbo. What's that and where do I get one?

I'm beginning to think turbo might be a better way to go, but now my engine
has the non turbo high compression rotors. Anyone know if this will be a
problem?
John Slade

That is a Garrett and it is one size up from the stock 2nd gen Mazda
turbo. I also noticed he choose a water cooled bearing housings
like the stock Mazda turbo's. Something that is hard to do with
an air cooled aircraft engine.

With a TO4 the high compression rotors could be a problem I would
guess. You might be able to get away with it with the smaller stock turbo
and less boost.

I kind of doubt the claim on less weight. The stock 2nd gen turbo weighs 25 pounds
and the stock turbo exhaust manifold weighs 11 pounds.

Paul Lamar
 
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