Decat with no map

[TomBlueS3]

As the title, fitting a decat with no map will no doubt trigger an EML light at some point.

However is it actually bad for the car/engine? Will the car enter limp mode? Will the turbo overboost?

Or apart from the light triggering is it safe/okay to do?

Cheers

 

[Starry]

I was told that the lack of restriction will allow the turbo to over spool. Not to be advised.