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We have pretty much the same problem with e60 lci. Car is with rebuild engine with cast iron block, stiffer valve srpings, r90, 2700bar rail sensor, custom intake 100mm, custom exhaust, 600x300x76 FMIC, new vacuum hoses everywhere, every single pressure converter tested with ista and with vacuum meter. HP turbo ball bearing and billet compressor wheel (stock dimensions), LP turbo ceramic ball bearing 82mm compressor wheel and larger turbine wheel with cutback to reduce EMP. Problem is Car does not want to spool the lp turbo. We've got 2.7 bar at 3300rpm constantly rising up to 3.0bar at 4400rpm and 3.05 at 4500, 3.1 at 4600 keeps going max to 3.2bar at 4800rpm. Fuel is maxed out, r90 starts to give up a lot. Anyone had experience with 82mm compressor wheel? We are pretty dissapointed from the results as the standart 77mm hybrid gives better power figures and better spool...
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