Well, see that's the thing. I'm the kinda guy that failed Algerbra-II because I spent the entire semister playing with the hot girl in high-school. Unless you just need the numbers, don't make me do it LoL! Cause I've done the math in excel & I get lazy & don't feel like doing it by hand.
I still think I had my priorities straight tho. Oh My God was she !¡!gooooood¡!¡
But what you'll wind up with is awhole lot of power. Remember that was non-intercooled. In that example straight twins would have been 220*F.
If they both were intercooled it'd have dwindled down to around 110-130*F on a good cooler.
Same for intercooling after the first stage in the compound charge.
Say in the first compounding example (1.689 * 1.408): It'd have jumped up to 219*F, A descent intercooler would have dropped that to atleast 130*F, the second turbo would have jumped it back up to 271*F. And an indentical intercooler to the first would drop it all the way back down to around
157*F.
In the second example (1.689 * 1.689): it'd have been 130*F, up to 320*F & back down to 185*F.
That's why you see turbo + turbo, or turbo + roots blowers used on diesels, or some drag cars running methanol where it's not as big of an issue.
But at any rate. The charge temps wind up being lower than if you used a single turbo making the same pressure & flow rate @ the same thermal effeciancy.
Compaired to using the same setup & parrallel charging like normal. Just by re-routing the piping you'd gain another 30-40% ontop of what the previous woulda been. I guess the best thing I could tell you that you could relate to, would be if you re-routed a 300zx twin turbo. You'd wind up with like 340-350bhp instead of 300bhp. Or a 3000GT would make 360-375bhp from 320bhp.
It's worth about 30-40% using the same compressors @ the same base boost levels. If you take them & run the second compressor the same as the first, it's worth more like 40-50%+.