You already mention the difference in compression between both engines, which makes a conversion more difficult as changing the static compression of an engine means things like cylinder head work or piston changes.

The turbo type is basically the same, but the high pressure uses a different compressor trim to run the higher pressures in it's 'sweet spot'.

The ECU programming is of course different as well and there may (but I'm not sure about that) be differences in the gearing ratio's of the gearboxes used.

There are tuning options for the LPT engine which brings it up to around HPT power levels, but with keeping the LPT 'character' of quickly building power at low rpm's while a 'real' HPT needs more revs to get the same effect.

Bye, Arno.