I'm kinda curious too. So many of these engine mods, whether DIY or the latest marketing hype (ie throttle body spacers) seem to have a placebo effect. I'm interested in empirical data, actual logs of mpg and any kind of real testing.

The deckplate is virtually no-risk and very low cost, so it's not as bad as laying down some bills for something of dubious function. But I'd love to see real data, esp on the 2.7L.

4x4Wire's Toyota Section
1995 FZJ80 LandCruiser - 3 locking diffs, +200k mi, JD HIR's, 285/75R16 Nitto TG's
Olde North State Cruisers