I would like to publish one of the interesting findings I made while selftuning my Mazdaspeeds (MS6 + MS3 Gen 1) which concerns almost all internal target value calculations of the MS ecu such as load, wgdc etc. Let me explain this using an arbitrary example: If you dial in the following target load...

Correct me if I am wrong (but I am pretty sure about this): Originally (stock tune) the Mazdaspeeds are load AND boost tuned (kind of hybrid or mixed tune where both, load and boost "error" (better: deviation) corrections will happen, i.e. there's some target load (the well known set of TL...

This is why the correction values should not be symmetric (to prevent endless oscialltions around your target load), not too low (in order to enable the system to reach the target load in time) and not too high (to avoid overboosting). The best setting would be very little adjustments within a small...

The still greatest riddle to me is the concrete ECU usage of the "BCS DC Adjustments - Boost Limit Exceeded" table - all other tables, which are relevant for achieving the target loads are quite clear (even if I doubt that anyone on this earth really únderstands all accessible tables in de...

That table is used when the values from the Throttle reduction boost limit (from the Absolute limits section) are reached. I know, but is it used (directly) before throttle closing operations or simultaneously? What exactly is the corresponding "closed loop" mechanism to limit boost under...

Just want to confirm that I also have this weird APP issue on my Gen1 MS3: actual load is almost exactly stuck to the desired values in the APP = 93.75 row of the APP req. load table under WOT conditions (instead of using the values for APP=100, although an APP value of 100 is logged during wot runs...

Hi mituc, nice to read you again (meanwhile I switched from a MS6 to a MS3)! Well, I do not really intend to try this out, since it is actually no good idea to imitate boost tuning without having access to the relevant boost error correction tables ;-) Nevertheless, it would be interesting to see if...

So, a (long...) couple of years later, I would like to reopen this interesting topic (although it is a real challenge to try to go this way using VT). What about this idea (for simplification, let's assume that wgdc 50 throughout the whole rev range approximately result in the desired boost values o...

Hi all, can anyone tell me the exact meaning of the table "BCS DC Adjustment - Boost Limit Exceeded"? Does it refer to the (solely available) boost limit table for throttle closing? Since the correction values are pretty low, it looks more like an incremental adjustment table during some c...

Solved: It's definitely not TPS (which is < 80) but APP!