No basically, the stock ECU can fuel until about 0.75bar on it's own. At 0.8bar fuel cut kicks in (feels like you hit a brick wall) You can get around this by running a Fuel Cut Defender, but it'll make the engine run lean and that way it will go pop. But if you combine it with a rising rate fuel pressure regulator, and get the two set up on a dyno then you can run that setup to 1 bar safely. This is bit crude though, so a plug and play ECU or Emanage Blue/Gold/Ultimate piggyback will be more finely tuned and reliable. I run a P&P ECU at a bar and the car loves it