Paul,

One company in South California, its eBay name is "turbos_r_us" could clip
my turbine wheel for me.  There are turbine wheels on his eBay site

clipped

at 5, 10 or15 degrees.  Do you think I should have my turbine wheel

clipped

at 15 degrees?  My turbo is the Mazda 1989 one.

Thanks
Rino

I am not sure that will work. It sounds like it will.
Most people have gone to a bigger compressor.
If clipping works to slow the turbine that would
be a lot cheaper to do. It also sounds like it might
reduce the centrifugal loads on the blades which would
be an improvement. Do you have a sketch on how they
are going to clip the blades? 15 degrees does not mean
much to me.

I see there is a turbos_R_us in Australia.

Do you have a web site for these people in So Cal?
Or an post address or phone number? I can go by and see the
shop.

Paul Lamar ...No rotor no motor.

Paul,

Here is the address of the company.

Standard rebuild is $ 275.00 and will take 2-3 days.

Performance Tech
346 south I St. #3
San Bernardino, ca. 92410
USA

Rino


If I were you I would not do it.

One: it might not work
and then you would have a junk turbo.

Two: it is a permanent
thing that will modify the functioning of the turbo forever.

I would try porting the waste gate first. Very easy to do.
You buy a grinding wheel that is the right
diameter with a steel shank. You can chuck in a drill press.
I lost the article about how this was done but it is pretty
straight forward.

Cheap and easy to do. You need to enlarge the turbo back plate
by flame cutting it out and welding a larger SS chamber
or two large SS tubes on it so the flapper valve can be
opened 90 degrees.

Then you can have your cake and eat it too.
Put a tach on the turbo and limit the turbo
RPM to 80,000 or so with the improved waste gate.