well im having a problem with the RS6,since ive changed the turbos,the turbos have started losing boost the higher up the rev range from 2500rpm you go till you get to around 5500rpm where it is on no boost at all till the redline,where as with the stock K04 turbos it ran full boost the whole time

also doesnt feel as strong too
Stock K04 turbos
Stage 1
thought it was an air flow problem so stuck on a racing intercooler and was still losing boost
then i decided to do a drag racing test down the le mans straight with the RS6 and my little brother in stock E55,in first and second when the audi had more boost it pulled away fine and kept a lead,but from 3rd onwards where the cars are higher in the rev range and the audi losing boost the e55 just went by the audi

only thing i can think of is to keep it on the stock turbos but then it will be extremely fair behind everyone else and not be competive
my proposal to eddie and the stewards and only trackday people is a change of car.
A 2005 BMW M5 with the same upgrades as the RS6(racing flywheel,sports clutch,S1 tyres and NA stage 1)
p.s. the second video is on youtube as putfile went down half way when i was uploading it
edit: video now on putfile and in synic