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

Francois,

I found this turbo map on a website, if it is true to it's label
this is the stock series 5 turbo.  Thought you could use it.  I am
having mine upgraded by the RX-7 store, they are putting on the TO4
60-1 compressor wheel that you noted is too close to the surge
line. You are right, but at least it is better than the stock
turbo.  I will only be using it temporarily until I can install my
other turbo, sitting in my hangar, and here is it's map. This is
the TO4B V-trim with a .96 A/R turbine.  The upper end of those
lines are running the turbo at about 6100[0] rpm, 18000 feet, and
40" MAP. This should yield quite an impressive TAS.

Dave Leonard

Hope to see you at Sun & Fun entered in the Sun 100 race Dave.

Paul Lamar

Dave

I am designing the gearbox for the upcoming turbocompounding test with
my 13B.  Could you tell me the diameter of the shaft coming out of the
turbine towards the compressor?

Also Dave when you speak to the shop next time do you think you could
ask them their if they could  modify a TO4 to peak at 60,000 rpm and
maximize torque at 30,000. I am having no joy writing emails to
different companies in USA. No answers. They obvious think I am a
little warped when I mention turbo-compound. Either that or Paul has
already 'had at em' them with the
concept:)

I may have to go a larger T06 series to get the torque I need. It will
have a separate clutch and the generator and that will governed the
compressor.speed.  I am only looking for 110% atmospheric at 8,000 so
the compressor  side can be smaller and not so important to finalize
at this point.  If you get a name and a person to speak and start them
down the conservation path I'll take it up from there and call them.

Thanks.  Hope you are turboed up and flying soon.

Doug in Japan

Have you tried Garret Doug? I worked with them a few years ago on
instrumenting a turbo charged Mustang. I did not mention turbo compounding
at the time. In any event I am sure the engineers I worked with are gone.

Paul Lamar

Paul, I have fresher news for you from Garret:  They sold their aviation
turbo line to Kelly Aerospace and don't want to hear about aviation
applications at all.

Francois

OK I won't mention aircraft.

Paul Lamar

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