Gotta say bloody fast. Not sure what BHP he is running, but it's not running full PSI yet. He bought it for £800 with the turbo half hearted put on. So he took his body damaged no turbo'd MX5 and re built the engine.
Exhaust was rattling like mad when coming off the gas, but must admit I was impressed, going sideways around roundabouts near me, even in his rubbish tyres.
Sorry for rubbish videos but pretty hard when it's self boosting and accelerating from 50-100 in a few seconds.
Here is a pic of the engine.