am new on here , and dislexic , some mothers do have em . ha, i ve got a wrx o2 bug , i bought it last year , it was 1 owner full ssh, had 110000 miles on it owener was 50 ish , anyways , i decated it fully , ss 3 inch up down pipe pannel fillter top shelf ss headers unequal, got remaped and blew it up. so had the engine rebuilt by andy sp in birtly north east , ran it in on all the right oil , even had a map put on it so it would not rev over 4000 rpm , after 3 oil , filter changes i recontected turbo pipes as it was only running on nat boost?, and it smoked like a fire , turbo was broke , td04 , i replace that , got pink injectors , welbro hp pump all fitted by my mate , subaru main dealer. put tod05 16 g on , engine had over size piston s rods barings haed gaskets, valves seals oil pump ,moudus, timing belt ,tensioners plugs maf sensor, i ve not used it since sept, as i think i can hear a knocking noise at low revs , compresion test was just over 150 psi on all of em , it stats half a turn after standing weeks in garge , i slighty melted rings on 1, 2 cynlinders .cost is about 2000 to fix , when i smashed it , am just wondering what could it be making that noise as its booked 4 remap soon but do nt wont to waste money if it is going to bust , my pall at subaru says its ok but he only replaces parts with new , . oil is now 10/60 i have once tryd to blow it up killed it dropped down gears so rev limiter was boncing , and it never broke , big ends would of with the stick it got , any ideas ? thank yous,