Quote:
Originally Posted by jpc647
Wastegage rattle. Chargepipes. Valves Carboning up. Fan motors (for the HVAC) dying/whistling(more x1 specific). Stupid things that shouldn't happen on 45k+ car.
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There is no real carbon build-up issue on the N55. The wastegate rattle is MUCH more an N54 thing as well, not a real N55 problem. But more importantly, none of those things are in ANY way affected by a JB4 vs. a stock tune.
The N55 is a SUPER strong engine. Adding a JB4 is perfectly reliable, and dramatically changes the car from a power perspective.
If you want to keep it stock, fine. But don't claim the JB4 somehow affects any of the issues you listed (sans charge pipe...which isn't a big deal asmost stock ones hold up fine, mine included) when it plainly doesn't. That's just simply false info.
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'02 S54 M3 (500/500 GC/Koni)
'08 N54 135 (JB4, DCI, BMW PS/Bilstein B6s, H&R M3 FSB, Strongflex FCABs)
'14 N55 X1 (JB4, BMS DP, BMS Intake, Alpina TCU reflash, H&R Sports, Bilstein B6s, E93 M3 RSB, Strongflex FCABs, baby seat)
'08 N54 535xi touring (Bilstein B6s, Downpipes, MHD tune, baby seat)