mine is about 300 and i can't feel the difference when running on LPG, they probably will be a slight difference bit i can't feel it when driving, it is great and that is running 1.5 bar initial boost which drops to about 1 bar at the red line, and my AFR's are 10.5-11.5 on WOT at 1.5 bar.
it is fantastic, and i have not had a play with my settings yet, just a basic tune and let the LPG system settle in, i have given it a check over today and gone round and tightened any connection that needed it, as with any collection of pipes and jubilee clips, they seem to relax and go a little bit looser over the first few weeks after installation as the rubber pipe relaxes and the metal of the clips relaxes so it does not hurt to go round all the connection with a spary bottle of washing up liquid and water and squirt all the couplings and any that needed tighting give them a tweek up.
this is why lpg installations normally have a 1000 mile check up,just to make sure everything is tickety Boo.