Lots of that sort of info on the regular diesel boards. The "Place" does "Dyno Days" where guys show up with all sorts of stuff and have free(?) dyno runs all day. They swap and match different boxes, some actually do oversize exhaust swaps, computer swaps, waste-gate tweaks and other stuff right there. At least some of them post the before and after graphs on the site, or at least the max numbers and rpm. Kennedy also routinely does a series of pulls that show the effect of stuff like the "new" (ok, going on a year now?) 200hp VA box touted as the first "real 200 hp box for the DMax". His test showed several combos before and after, basically supporting their claim.
