Great job digging up that info guys. So from the charts posted, It appears that the P47D models are indeed consuming way too much fuel in WEP mode. The fuel consumption in WEP from the info posted shows 255GPH, which for the main arena's 2.0 fuel burn multiplier would convert to 510GPH (a huge step down from the current 670). Additionally it's interesting to note the fuel consumtion rates and power output at lower manifold pressures. These also seem to be off on the high side (the 32" manifold pressure seems to be consuming ~60GPH higher than posted stats in addition to feeling pretty anemic, barely able to maintain even level flight).
And lastly is perhaps an F4U/F6F nerf in order? The TimRas's post clearly shows the military power setting F4Us consuming a whopping 290GPH (even higher than the P47 military power albeit at a slightly higher manifold pressure). I guess the turbo does in fact not harm fuel consumption and perhaps if anything helps it a little. Now this figure of 290GPH converted for the main arena multiplier would yield 580GPH (same as P47N interestingly enough), almost 100GPH higher than the current 485GPH it uses. It's WEP fuel consumption is listed at 245 GPH, yielding 490GPH (similar to what it is currently).
Overall though it is as I suspected, any R-2800 is going to be about the same as any other in fuel consumption according to the posted historical data. The major differences we have in game are most likely in error.
Hitech, if and when you do get around to fixing it, please toss a Paddle blade prop on the P47D11 and label it a D23 or something, many of us razorback fans would love it for the MA.