...why in the heck Yankee Stadium 1 and even 2 (only slightly modified right field porch) are listed as negative for homers in right field? 

I just created a 1927 team with Ruth and put them in Sportsman's Park instead of Yankee Stadium because of the slight bump for right field homers.

But really? Yankee stadium discouraged home runs to right field according to WIS?

Who here thinks that the NY Yankees were utterly misguided all those decades in signing Babe Ruth, Lou Gehrig, Bill Dickey, Yogi Berra, switch-hitting Mickey Mantle, Roger Maris, Reggie Jackson, Graig Nettles, Bobby Murcer, Tino Martinez, Don Mattingly, even Joe Pepitone in the misinformed impression that these guys would be pretty likely to hit some home runs to right field and that they were shaping their team to the stadium they had built (or Ruth had built) with that express purpose in mind?

Yes, Joe Dimaggio took advantage of the room in the center and left to hit a lot of doubles and still hit homers to right. Joe Gordon at times too. But can't we get Yankee Stadium to reflect one of the most (after the Green Monster in left at Fenway) famous and well-known features of any ballpark in baseball history?

The weird thing is that WIS doubles down on the current Yankee Stadium, giving it a +4 to right field. ????

Can't say for sure.  I don't know exactly how they come up with their numbers, but I do know they are derived from actual stats. A cursory look at various sources suggests that it's not just B-R...other places like FanGraphs are equally conservative.

I don't have time to look exhaustively, but I think it's interesting that in 1961:
Yankees at home scored 411 runs, hit 112 HR
Yankees on the road scored 416 runs, hit 128 HR

In 1927:
Yankees at home scored 479 runs, hit 83 HR
Yankees on the road scored 496 runs, hit 75 HR

In 1939:
Yankees at home scored 382 runs, hit 84 HR
Yankees on the road scored 585 runs (!), hit 82 HR

In 1950:
Yankees at home scored 440 runs, hit 78 HR
Yankees on the road scored 474 runs, hit 81 HR

So in 4 of their greatest offensive seasons in history, they scored 1712 runs at home, 1971 runs on the road.  Hit 357 HR at home, 364 on the road.

Maybe WIS is onto something?

"Gone in any ball park"  Don't remember which dice baseball game this was  a phrase in  but aren't the majority of HR's hit really would be gone in any ball park.

Even Bucky Dent's homer would have been gone in most parks.  

If you want to do an accurate WIS study have a Wayne Gross hr study league, everyone takes Wayne Gross and see how he does in various parks.

who woulda thunk it?

i think of sac flies as warning track power

i wonder if big parks produce more than band boxes

The first version of Yankee Stadium was a pitcher's park and particularly poor for RH power hitters. For example, Joe Dimaggio's home/road splits are as follows:

Home .315/.391/.547 148 HR in 3,790 PA

Away .333/.405/.610 213 HR in 3,883 PA

That I recall very well PennQuaker, but for left hand batters it was pretty much like batting in my backyard as a kid. Still, it gets a -1 even for right field. 

Though the numbers contrarian23 has posted are eye-opening. Strange though they seem to me.

Yeah, I think perception and reality are fairly far apart on this one.

Once "The House that Ruth Built" was built, Ruth hit more homers away from his House than in it.  Gehrig hit a few more at home than on the road, Mantle hit a few more on the road.  Berra and Dickey, however, hit substantially more at home.  Who knows.  The raw numbers almost certainly bear out WIS's numbers, but it is a bit surprising...

good reply contrarian... food for thought. I'm smarter than I was prior to reading your post.

Posted by dahsdebater on 1/27/2016 6:52:00 PM (view original):
Yeah, I think perception and reality are fairly far apart on this one.

Once "The House that Ruth Built" was built, Ruth hit more homers away from his House than in it.  Gehrig hit a few more at home than on the road, Mantle hit a few more on the road.  Berra and Dickey, however, hit substantially more at home.  Who knows.  The raw numbers almost certainly bear out WIS's numbers, but it is a bit surprising...

You guys are blowing my mind !

Seriously this is interesting to know.