To start, the car has a stock flywheel, stock clutch, OTTP solid front and rear transmission mount, is rotated, stock top trans and engine mount. Used everything from the LDK, intake and exhaust manifolds, cams (obviously). ZZP intake tube with stock airbox, ZZP upper and lower charge pipes with their intercooler, spherical CABs.
Having low load, low rpm knock retard issues. This has been pretty consistent around 30-80% Air Load, below 3000 rpm. So when starting off from a stop sign/red light until 3000ish rpm.
I'm working closely with a very intelligent tuner who has tried many things but still can't narrow it down, VVT timing, main spark timing, DALs, MALTs, Optimum Torque, MBT, injector constant, injector corrections, injector spray angle. I have a log to do today which plays with the spray angle more. But I'm wondering if anyone else here knows what the problem could be? I don't hear any "clangs" like something hitting the chassis somewhere, I don't hear anything popping like raw fuel hitting the exhaust manifold, I'm honestly out of ideas. It's odd that opels in an LNF can be so easy to tune for while in the LDK they're a whole different animal.