Paul, what is the average (or max) turbine speed for a T04 turbo on a 13b? \
I would assume an A/R of close to 1 on the
hot side.

Any ideas?

Kevin Alderman


My guess is 80,000 but I have no data yet.
The last turbo engine I built we installed a turbo tach.
It hasn't run yet. The builder moved.

We spent two days installing the turbo tach in the compressor housing.
It was mostly a learning experience so the next one we do will go faster.
It is tricky to do. It required some expensive accessories for the
Bridgeport not to mention a rare 6 mm .5 metric tap.

You need a turbo tach so you don't over speed the turbo.
It fails due to centrifugal force on the blades at some combination
of exhaust temperature and turbo RPM.

We arbitrarily limited the RPM to 80,000K on the stock 2nd gen
turbo. People have destroyed at least a half dozen turbos
on 13B not doing this. The stock turbo is not designed
for continuous duty. It will only last a couple of hours
at 12,000 feet.

Paul Lamar

Link to Garrett Turbo Tachometer Installation....

http://www.rx7club.com/fabrication-250/my-budget-peripheral-port-80mm-turbo-60mm-itb-intake-manifold-fuel-system-build-737054/page11/

Kelly Troyer


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