As said previously you will need custom internals as nobody makes them for the XU7 'off the shelf'. Big money there before you start.
If you kept stock internals I reckon you could run approx 10 PSI without too many sleepless nights. Others will be able to advise better, but perhaps run it a bit rich to keep heat down.
It really depends how much you want to spend.
If you want to do it properly you will need a remap on an aftermarket ECU. You could save costs and go piggyback, but TBH whats the point when you can pick up used OMEX, Emerald, Megasquirt etc for circa £300.
To hit 200 BHP on a low budget would be most impressive. Considering they are 121 bhp standard (on paper), to get another 79 bhp on low boost, standard compression.... Shady.
If you kept stock internals I reckon you could run approx 10 PSI without too many sleepless nights. Others will be able to advise better, but perhaps run it a bit rich to keep heat down.
It really depends how much you want to spend.
If you want to do it properly you will need a remap on an aftermarket ECU. You could save costs and go piggyback, but TBH whats the point when you can pick up used OMEX, Emerald, Megasquirt etc for circa £300.
To hit 200 BHP on a low budget would be most impressive. Considering they are 121 bhp standard (on paper), to get another 79 bhp on low boost, standard compression.... Shady.
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2000 Moonstone 1.8 Meridian - Sold
2000 China 3dr XS - Dead
1998 Diablo 3dr XSI