"Kent, Russell" wrote:

John Slader wrote:
[snip]

As I passed through 5800 with 36 MAP I noticed something interesting.

[snip]

At 5900 rpm and 38 MAP it was even smoother.

[snip]

I backed off - ok chickened out - at 6100 rpm and 185 kts indicated
with a 44 MAP.

[snip]

By the way, perhaps I should mention that the manual wastegate
was wide open for the entire flight."

????
How can he get such MAPs with the waste gate wide open?  I would expect
that a *properly working* waste gate should yield MAPs close to
atmospheric when fully open.

Russell Kent

The waste gate on the stock turbo is too small. The stock turbo relies somewhat
on turbine inertia and  the back pressure of the muffler to limit boost.

Paul Lamar
 
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