Tilley was the 'Most powerful slant' I was referring too. 630hp I think. IIRC he's running about 20 pounds, and noticed little gain from 18-22 pounds. Every case is different though...
Generally speaking, more boost equals more horsepower, but not always. Tilley's car has a unique and unusually efficient fuel injector, I think, but I wish he were on FABO to explain his take on that phenomenon.
