4000 rpm @ 60mph
It's not for novice, but coding for the instrument cluster is easy enough. They have a page here, scroll down to the Instruments section.
http://www.ross-tech.com/vag-com/cars/audiB5.html
As far as the issue with my Audi, since this is likely an issue with the tach there is no harm is driving it at such high RPMs?
how does the engine sound? Does it sound loud and strained? If not, you're OK.





