[Yeahdoug]

Having trouble getting it rich enough near redline. The car has a slightly larger turbo (K27 7200) that was set at 1 bar. We installed an adjustable WUR and set it up close to the stock one for a baseline. The problem is we cannot get it any richer above 6000 RPM. It starts at 10.0:0 at low boost when the fuel enrichment kicks in. Runs 11.0:1 up to about 6kish when it quickly goes to 13.0. We've made a few boost enrichment adjustments on the WUR and it hasn't changed a thing. The control pressures all behaved correctly after the adjustments. With more boost enrichment the delta between warm and boost went up. Boost enrichment control pressure is under 15 psi which is 10 psi under where we started tuning it at. This 10 psi drop gave us no difference in AFR between the two boost enrichment pressures. Warm pressure is at 48 PSI, so we have a huge pressure drop for enrichment. The mixture adjustment only influences the midrange and lowend. Nothing we've done has helped get the peak AFR down. The boost was lowered to .9 bar and was still lean. The car dyno'd in the 340 whp range. Does it need the fuel head modified? Should we be looking at maybe a pump problem. I would have thought the stock system with an adjustable WUR would be OK for 340 whp. Seems like there is some fuel limitation that is none WUR related that we're up against.