Quoting G:
Hypertune made +43 over the stock manifold.
Hypertune made +51 over the old magnus.
Fin~
That thread posted was during buschur's spat with marco and his results in there were dis-proven about the v1 magnus all over the place. For what it's worth, if you want compare numbers I like dynojets because you can't f*** with the output (assuming no correction factors) like you can with a DD/mustang.
If you look at the actual sheets from marco on the cast manifold it's +40hp on an Evo over the stock manifold on a factory turbo...
click
tons of other tests confirm I'm not crazy, but whatever.
There is no possible way that a sheet metal manifold with a big plenum and shorter runners makes less power than the tiny plenum stock manifold with long runners, especially on a big turbo car like dave is using. I'd also point out that unless you're revving high and have a very well built setup, the maximum gains from a manifold are going to be well out of reach.