hi mate i take it this is alexs car. has the engine had any head work apart from the cams? if not around 330/350bhp @ 24 psi , mine did 418bhp @ 23 psi at 6500rpm but the old t61 wasnt in its sweet spot until 7000rpm. sounds like it will be a nice drivable engine coming on boost at 2500rpm.

would be nice to see if the race 4-1 merge collector will add any major gains as lance at ojz said they are a good 20% more efficient than the pot design

cheers paul and tell alex good luck