Boost control drops slightly yes, but it's quite stable so it may be that the duty it set fine for the road but under-achieves on the rollers. if it was a BCS issue I would expect to see more oscillation on the graph.
Does it read the same boost out on the road.
If the boost control on the road only just achieves the mapped desidered boost, then on the rollers, where the induced load is slightly less it will under-achieve.
Not sure how good the syvecs is on boost control, but the OE ECU has a level of learning i.e if it doesn't achieve target boost it will add or take away a % (within the mapped limits) in order to achieve target.
The fuelling also looks OK, you don't want it reading much leaner then that on Charlies rollers, most on his RR read under 11 AFR but read leaner i.e 11.2/11.3 out on the road.
TBH looks like a Bob map...nice and safe....
FYI Mine reads bang on 11.2AFR on the road but on charlies the plot was similar to yours.
|