As much as it pains me to do so (as he's a shit stirring cock ), I'm with Phil on this one. IF the vacuum hose popped off the fuel regulator on the car as is being stated, and was driven any distance like this allowing the engine to come on boost, then I would be more inclined to blame this for the engine damage than the map. As Karl has correctly stated, you can't point a finger at the map JUST by reading the files.

However, just to confirm, Tony is saying that Luke's map has 14° of ignition at 2.87 bar (absolute) at 4500rpm? Given that to achieve this ignition value, the engine has to see this boost pressure (1.87 bar net) at this rpm point, where by all accounts on the rolling road, the car can't physically make 1.87 bar at 4500rpm, I can't personally see how it could be blamed for wrecking the engine? Obviously as Chip has said, it would be better to have a conservative value in there, but if the engine can't physically make this boost at this rpm, it is unlikely to be the cause of the failure (the only way to check this would be to rebuild the engine as it was, and datalog the boost pressures on a fully loaded run to see what load sites it was hitting).

Accordingly, IF it was physically impossible for the engine to achieve 1.87 bar at 4500rpm, I would not be worried by that ignition value in any way, shape or form.

To really build up a more accurate picture, you would want to see ALL the ignition values at each rpm point / boost point. As an example, a typical 83lb chip runs the following ignition values at 4490rpm:
25.25° at 0.24 bar
25.25° at 0.69 bar
21.50° at 0.96 bar
16.75 at 1.32 bar
10.75° at 1.82 bar
8.5° at 2.1 bar

However, Tony hasn't yet put what the full list is for Luke's chip, so we can't see what ignition value to would be running at 0.65 bar at 4500rpm, which is what it makes fully loaded on the DD RR at this rpm.

I have personally suffered a vacuum hose coming off my regulator and what happens is that it no longer becomes rising rate - instead the fuel pressure remains static no matter how much boost the engine sees (I don't need to tell anyone how bad this is for an engine?). If you're lucky and you spot it without coming on boost, then you won't see any damage. If you give it some welly a couple of times, then the engine might survive, but suffer some damage and then when the hose is put back on, unless you check with a borescope, you have no idea if the engine suffered any det sufficient to cause any damage or not.

Eventually the engine can let go several months down the line due to cumulative wear and tear initiated by the hose coming off (you can normally tell the age of the det by looking at the pistons, fresh det compared to old det "should" be pretty obvious). If you're REALLY unlucky like I was, you'll give it three quick blats up to three figure speeds and the engine will lunch itself leaving you stranded in Scotland (and that's with a baby T34 ). From then on I soon learned to lockwire the vacuum pipe in place .

In the meantime, I too would like to wish Luke all the best, as I cannot even begin to imagine how I could have coped having been through what he has. I also have a new found respect for Danny for sticking by his friend through thick and thin. I only hope the people I think of as good friends would stand by me in the same way if I was ever to be in a similar situation .