Wow - lots of interesting conversation on here. That's great to see, just like when Nitrous came on the scene so many years ago and it wasn't universally understood.
30hp gain at the wheels with no tuning? Totally possible, but not common or likely. What makes it more likely is when there is no intercooler, or the intercooler is heat soaking, and the compressor is past its efficiency range or the intake temps are just plain hot, etc. Also, the more adaptive the engine management, the better the gains without tuning. The more conservative the factory tune in this situation, the more gain you can get. As if the IATs are high, and that triggers ignition retarding and/or boost reduction, an instant gain can be had. If the engine is set very rich, with the addition of 30/70 water/methanol (-20 deg washer fluid), it will richen the mixture slightly (say about 1/3 point) which would very slightly lean the air-fuel mixture, also making more power.
On supercharged V8s, we have seen 30+ hp with no other changes, just injecting water-methanol. Apples and oranges, but still fruit. Again, not common, but totally possible.
I remember talking about the Speed6 and mentioning 30hp with a good tune shouldn't be a problem, but not without doing anything. We tend to be more conservative with our claims. Keep up the discussion, and post some dyno numbers. As long as our customers are happy with the results!
