Richard Holdener starting to doing some 2.2L DODGE TURBO dyno testing.

One of my fiends has a Spirit R/T and a Charger GLHS.

We've seen several lightly modified L body 2.2T cars in the mid 13's.
Not terribly hard to do.

I believe I was one of the first to discover a controlled over-boost condition on my 86 CS.
I had a vacuum leak that would allow over-boost at WOT, but then seal up before the shut-down kicked in.
Took me forever to find that leak but it was fun as hell for about a month before it wouldn't close off and triggered the shutdown every time.
After I fixed that, one of my friends (mentioned above) friends built a device to simulate that leak and close it off at the proper point.
It was called a "widget". I believe he sold those for a while.