Barry Gardner wrote:

Paul,

I have my turbo off my car (that's like your's in the picture you
put on the net) and I'm going to port the wastegate. I'm thinking
of replacing that smaller wastegate with a larger disk so that I
can port it out more. Do you think that's viable?

I do agree the disk needs to be larger.
I will have to take a closer look at the way that disk is captured
by the lever. That is the trick. I don't think it is welded on.
I think it was made in one piece and then it was forged some
how. Probably by heating the end of the pin and applying tons
of pressure to form the a loose rivet head. See the picture below.
You might have to make a couple of prototypes and test them
to see if you can make a workable device.

Jeff Spitzer wrote:

Wastegate valves only float for production reasons.  It's too much work to
make it fit well and much easier to use the floating trick.  Just turn
yourself a valve from stainless with a shaft to go through the arm, custom
fit it over the bigger hole, and weld it to the arm while in-place...job done.

Jeff Spitzer

Thanks Jeff. That sounds like it really will solve the problem of
the stock 90-92 turbo waste gate. The only thing left to worry about is the need
of a Inconel wheel. Some one needs to install a TIT thermocouple and 
measure the temp at various HP levels and mixtures. I could do that on my
dyno as soon as I get my redrive and computer from Tracy.

BTW I am still looking for a junk prop that I can cut down and run the 
engine at 6000 RPM static full power. Search your hangar guys.

Paul Lamar
 
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