With the car in 5th gear, 185/70R14 tires and a 4.11:1 rear end, your RPM should have been: 3594.900684123614Sorry for such a banal question but can anybody out there who has a stock S4 Spider please tell me approx what RPM you are showing at 80mph? I used the very good thread (on this forum) to adjust my Tacho and just want to make sure it is close. At 80mph I am now showing 4100 rpm. Is that about what it should be?
PPS-to everyone with all the advice thanks you VERY much. I managed to fix the VVT issue and the entire flat spot issue on my S4. The low idle was in fact (I believe) an incorrect reading tacho!