88A5TQ

Hey again everyone, very helpful forum by the way thanks. I am about to purchase a new bentley manual for the 1988 audi 5000 CS TQ and I was wondering if those that own the manual already could tell me if it describes how to adjust fuel control pressure (with gauges I'm sure) and the other pressure that opposes it? I ask because I discovered directions on another forum describing how TOX cheap adjusted those fuel pressures to allow for more fuel and more boost in the top end. I plan to buy the gauges and follow these outlined steps. My bother has an M3 Id like to keep up with (well maybe for a few seconds at least haha). Thanks again all and keep carvin' corners out there!