Theres 2 or 3 guys with almost your setup. (ie Janspeed, GRs, and Alta 17%) but no cam making a lot less power than you. Why is that? The cam you say is 'same grind as Shrick' and I know that wont make '20bhp odd 'difference. Something doesnt add up . Yes the engine was someone elses once. But its in your own demo car .
Who with a GTT260 conversion went to the RR? Because thats what spec my car was. I know everyone thats had a GTT260 fitted & setup by us.
Why would you not have 'at the very least' a secondhand JCW head on your car. I mean you're breakers, so your going to pick the best bits out the pile of parts for your own car even if you dont want to pay for aftermarket gasflowing. You guys drag race,..... your going to leave out nothing .
Also what fuel did you use? Maybe Sunoco GT (109 octane high oxygen)
I thonk I can see why you wouldnt offer those 4 or 5 parts as a 241bhp conversion.