DSX Tuning

This may not look like much… but we continue to develop things for our customer base. What’s this, you ask? This is overboost protection built into the factory E92.

You have three cal parameters: boost limit (in absolute pressure), accumulated threshold, and decay.

We use accumulated overboost because this allows it to react faster when you’re farther over target. If you’re really high for a short time or sort of high for a long time, it’ll trigger. Think… area under the curve. When you’re fluttering around the limit, the decay value pulls from the accumulator any time you’re under that boost limit. When the safety triggers, fuel is completely disabled (the Atlas instantly follows suit) until manifold pressure drops below ambient plus 10kPa.

We also built in a fuel pressure safety. You have a nine cell calibratable table of rpm vs pressure along with a hysteresis rpm. The first cell’s rpm value is the rpm above which the safety is active. You have two choices to use: gauge pressure or delta pressure (better for those with a 1:1 regulator). If pressure trips the safety, fuel is disabled until engine speed falls down below the hysteresis set point. It is hard coded to not let you use settings that put your re-enable rpm lower than 300rpm above the factory anti stall limit.

We have some other fun things that we will release all at once along with a huge Atlas update once we slug through all operating systems. We have a full neural network delete for the E90/E99 crowd featuring five regular old lookup tables at five different definable cam indexes, and it blends between as needed.

While we were at it… we built our own neural network trainer too. 😁 This one is a little different… you simply feed it your log, and it only trains wherever you have data. No need to extrapolate or fabricate data where you aren’t operating. Bonus… it can upscale you to 20 neurons.

All of this will be available at no cost for anyone running an Atlas, both new and old customers. So… what features do you want out of the stock ECU?