Hello, I am new to this forum, and Audi products in general I have the opportunity to buy a purpose built race car for hill-climb racing.  It is powered by an Audi 2.7L twin turbo v6 (2001 I think).  the previous owner has removed some things from it, one of which is the aftermarket ECU he has been running.  My question is, would it be possible to run an Audi ECU without all the standard Audi accessories (Dash, wheel speed sensors, etc.)?  I have heard that a lot of Audi/Vw products like to have all the stock hardware attached.

But still - getting someone competent to tune stock ECU would still quite likely be cheaper, than buying a standalone.

Whatever you do, don't fit that. At least get ecumaster. Similar price, but at least it is a professional product.