turbo-ing a 318, especially a e30, doesn't make much sense anymore.
stick a s52 odb1 conversion in there, you'll have more power than you know what to do with.
Hot: 2001 Estoril M Roadster
ZCP 19's, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt
ZCP 19's supersports, ZHP knob, UUC short shift GROM, OEM 18's w310's,
http://absolutehid.ca hid kit