Sunny5999 3 Report post Posted February 27, 2019 Hi, I have Full Bolts On 335i 7hd intercooler, dps, dual cone intake, chargepipe bov, index 12s, 1 step colder spark plug. ON MHD STAGE 2 PLUS. My question is, with all these mods and stage 2 plus 91-95 map, my car is only hitting max 14 psi, where as the actual target boost is 17 or 17.6 on the mhd monitor? Quote Share this post Link to post Share on other sites
B.M.W Ltd 950 Report post Posted February 27, 2019 Air leak. compressor side. Have you checked with a quality boost pressure gauge ? Quote Share this post Link to post Share on other sites
Matth5 471 Report post Posted February 27, 2019 Also a pretty common failure point is the pressure converters AKA boost solenoid. If you have an N54 you'll have two, N55 has one (one per turbo). It wears out as it gets old. Quote Share this post Link to post Share on other sites
Sunny5999 3 Report post Posted February 27, 2019 28 minutes ago, B.M.W Ltd said: Air leak. compressor side. Have you checked with a quality boost pressure gauge ? Can you take a pic and point it out on your car please. Mines an N54. Quote Share this post Link to post Share on other sites
Sunny5999 3 Report post Posted February 27, 2019 7 minutes ago, Matth5 said: Also a pretty common failure point is the pressure converters AKA boost solenoid. If you have an N54 you'll have two, N55 has one (one per turbo). It wears out as it gets old. Mine were changed. Quote Share this post Link to post Share on other sites
