Thanks Francois that is pretty close to what we are guessing at. I
think Dave Leonard is going with the same compressor wheel and
housing. It will be good to see the new performance data. If it
works out I will get mine modified as well :) Did you have to space
the turbo out to accommodate the larger compressor wheel?

Who modified the turbo for you?

Dave who did yours?

BTW Francois got any pictures of that mounted turbo tach circuit. I
can't quite figure out how it is mounted from just looking at the
pictures on the Spanish manufactures web site.

Paul Lamar

Paul, here are the pictures of the turbo RPM sensor you asked me for.

Francois

Thanks Francois.  Amazing how it works with an aluminum wheel.
Any idea what electronic principle it uses? Come to think of it after looking
at my wheel maybe it is not aluminum. The blades are kind of thin
to be made out of aluminum. They are not magnetic however. Perhaps SS.

We will just put a blast tube on it to keep it cool.
Working together on this we can make progress faster.

Paul Lamar

If it's a magnetic field the blades pass through, eddy currents are
induced, which show up as a change in the magnetic field.  My pop loves
to stump the physicists with a round magnet and an aluminum or copper
tube.  Cut a 15" length of the stuff, hold it vertically, drop the
magnet in the top.  It takes about 6 seconds for it to get out the other
end.  Short story is it's creating eddy currents in the tube...  The
closer the OD of the magnet is to the ID of the tube, the better it works...

Chris Cosman

If he is stumping the physicists with that trick they are not yet physicists :)

Paul Lamar

True!
Chris

 
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