So with a little more tweakage, setting and playing with the boost controller I decided to have a dyno run on a hub dyno to get some accurate hub/wheel HP. The dyno was a Dynapack, which is the same make/model that APR use to run their Golf R's on in the USA. The figures are at the hub, so basically whp!!!
Even a minimum 10% addition to these figures for drivetrain losses works out at 408+bhp, more realistically would be around 12-15% losses. The run was only done with 99ron and 50/50 water, methanol. The run also only went to 6200rpms and was still gaining power. When Rick tried to alter the dyno to use more rpm's the dyno didn't want to know, so there are a few more whp in the bag yet. For comparison APR stage 3 figures are shown under my graph and are 371whp and 394wlbft compared to my 371whp and 388wlbft.