Quote Originally Posted by McDub View Post
i wonder if mine is doing that... (though i've got unitronic not revo)... power went down considerably some time back, i still seem to get the right amount of boost though so not sure. power seems to really die off anywhere over 4500rpm...
do you know more about this 'semi safe' mode? what was it limiting?
Have you checked that your boost isn't falling away at higher revs (as it did with the stock DV in the MM video)?

The other thing I'd be checking is fuel path (no clogging/reduction in ability to flow fuel into the engine) - if that's happening, the ECU will detect the car leaning out (or will detect the start of pre-detonation) and will slow things down to ensure there's no damage to the engine).