The important thing to note is that all dynamometers are not equal. Use them as a tool and to see the difference after a solid baseline on the same machine. Changing machines and expecting to have useful data, namely the delta or difference, after tuning or changing parts is an exercise in futility.
Here are the results in the words of TTFS:
In case anyone is wondering our brand new heart break dyno reads about 10-12% lower than a dynojet. Here is a E46 M3 with headers and exhaust showing the before and after delta gains.
Vehicle: BMW E46 M3 SMG
MODS: Headers, Exhaust, and TTFS Custom tune.
Baseline: 278.8 wheel horsepower
After the TTFS dyno tune: 305.4 wheel horsepower
Here is another forum member who was tuned remotely earlier this year and decided to drive down from PA to check on his vanos bolts etc. So we figured why not dyno/review the tune.
Mods: Euro headers, section 1, K&N drop in filter and TTFS Custom tune.