Originally Posted by
3barboost
Hi all,
help and insight please on a golf 5 gti dsg with a chinacharger k04, oem equivalent diverter valve, twintercooler, ebay intake, autotech hpfp upgrade, s3 injectors, full exhaust (3inch downpipe and no cats)
Car runs like a raped ape on wot, peak boost in midrange is 25/6 psi, tapering to 17psi at redline, actual lambda is spot on, requested and actual fuel pressure follow perfectly, no knock / misfire events on WOT however on partial throttle it will over boost in the midrange and trigger over boost code, it will run past 30 psi in the midrange with a light throttle, sub 30% pedal angle, but it obviously trips the boost cut and the ecu switches the boost off until a key off / on cycle resets it
I am looking for some guidance on solving this
I think the fault sits, in either the PR ratio limit table and/or the dbw throttle desired pressure ratio in boost or is this a maximum desired load issue ? I am a bit lost in the math's now of getting this to line "back up" from lots of changes made
I have made loads of changes and the attached file is by no means the correct one, just getting a bit lost in this and feeling like tail chasing is going and its time to pause / engage and think about this, any and all feedback welcomed or if anyone knows the maths needed to get those tables to line back up it will be great
or is this potentially a hardware issue with the chinacharger and its associated N75 valve it came with ? or hardware issue else where ?