This makes perfect sense - so really the matter is down to idiot user rather than mechanicals then.
Mind you, I wouldnt mind a crack with a pair of BD5895607834593657's. Do you recommend both inlet and exhaust?
So it sounds like the technical stuff relates to the cylinder head and what lies within. This makes sense.
But lets turn back to the turbo. Given that we know that we can create the 500bhp realtively easily by simply bolting on a massive turbo, and that by putting a small turbo on the engine it restricts the flow of air, how do the improvements on the cylinder head get over this obstacle?
JJ