Hey there this thread is interesting but as the previous people discussed Liqiud injection can be used in high hp applications with either the use of twin injectors or the new improved high flow liqiud injectors,
We have converted a few Xr6 turbos with this system and its fantastic and with a decent tune can produce in excess of 300 kw at the wheels and more, with extra injectors can go beyond this, liqiud cannot backfire as its the same principles as a petrol fuel system, just under higher pressures.
we can currently fit kits to any pre-2004 vehicles with custom setups available,
the only down side of a liqiud conversion is the cost,
in excess of 5k for a custom setup/tune but the results are amazing
my 2c worth
cheers john