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Sunny5999

335i Dct FBO

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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? 

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Air leak. compressor side. Have you checked with a quality boost pressure gauge ?

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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. 

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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. 

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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. 

 

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