You're the man once again! I was reading about these engines and they jumped up to 10:6 compression then on the tsi they went back to 9:6 I believe. Should I be worried about snapping these balance shalfs with the torque? I work with the guy that builds these crazy k04 wheels. On the 1.8t we put down 360hp on a stock location k04! So we are throwing the stage 3 compressor wheel and turbine straight in. But I don't want too blow it up first pull.
Nah, lowest stock comp ratio on the TFSI is 9.8:1 found in the K04 based engines. Balance shafts don't tend to snap, but they've been known to seize which will snap the chain. The shafts run off a sprocket inside the oil pump housing so no chain = no oil pressure. The 1.8t oil pump will fit with a little block modification and use the 1.8t oil filter housing. Common mod on big build TFSIs as it removes the balance shaft assembly and also runs a little extra oil pressure due to the slightly smaller sprocket on the pump.
K04 hybrids are good, but beware that when pushed they generate a huge amount of back pressure and EGTs. Some TFSI engines struggle with the back pressure and will misfire with valve float on the exhaust side. Cure is back off boost pressure, run a better flowing turbo, or fit stronger valve springs. You'll need a stronger actuator as well as the stock actuator will blow open the waste gate at the top end on a hybrid.
