Hi,

I've just "finished" my beetle's tune. It's 1.8t AWU with 032BJ (AUQ, because of damos ), 430cc bosch green, DP 3", TIP 2.75", Hybrid k03/k04-064 turbo with 140x550x65 chinese FMIC. Car haven't been dyno'ed yet. The problem is low flow on relatively high boost. On about 1.3-1.35 bar at 6k I have only 190g/s flow. No leaks (tested about 30 times - REALLY. because of boost problem described in my other post), MAF is new OEM Bosch, DV new bosch, n75 new pierburg. Whole intake is 2,75" from turbo to throttle except oem flat pipe before intercooler and 2" throttle inlet(this black pipe). Is that a problem? Is FMIC too small? I don't want to go over MAP limit :/ I've seen cars that made 200-210g/s on 1.2-1.3 bar. Logs attached. Thanks in advance!

Thanks for reply, iat was about 30 degree celcius, I checked it many times, maf calibration is stock, oem maf diameter and sensor. Ps_w isnt modeled pressure? Well I know understand nothing :/ Doesn't bhp depend on flow instead of pressure? I'm now scrolling vcds log on malone tuning log viewer and I see even 230-240g/s on 1.45 bar in some logs.  And whaf does it mean thar pressure is built in that log?

You said

If your problem is pressure drop, "high" boost at the turbo isn't being measured, the boost you are measuring is at the throttle body, so if you think the boost is too "high" for the maf readings you are seeing, it isn't because of pressure drop.