i have been doing some research on 4 port ebc and not many people have posted on here from what i can find. i did find one user who did do the swap to a 4 port mac but didnt like how sensitive the resolution on the wgdc table was so i got to thinking. Could i mess with the scaling to create larger numbers that would result in a greater adjustment to the wgdc table? would that create an issue with the voltage going to the boost controller? can the stock ecu make such fine adjustments? this is the post im refrencing

this is the normal scaling that is loaded in my tephra V7 XML (8859 btw)

<scaling name="WGDuty" units="%" toexpr="x/2" frexpr="x*2" format="%.1f" min="-150" max="150" inc="0.5" storagetype="uint8" endian="big"/>

changing toexpr and frexpr will just change the numbers display on the table but the resolution itself wont change. you can change it to be twice as big but the to lose the 0.5 adjustability. if possible this could open up the possibility to having more sensitive BEC tables where adjustment to be made to .25% allowing for more accurate boost control overall.

im calling all the xml wizards of the forum to see if this could be possible or am i just dumbass lol.

 

So, like, if you want to mess with the scaling of the WGDC table, it could give you a wider range to adjust things. But, dude, you gotta keep in mind that the stock ECU might have some limitations, ya know? Changing the scaling can mess with how accurate and controlled the boost levels are, and the ECU might not be able to make super fine adjustments.

Basically, it's a trade-off. You might get more control, but you could also mess things up if you're not careful. It's best to consult with experienced tuners who know their stuff when it comes to ECU mods. They can tell you if it's feasible and what risks you might be taking.

Just remember, dude, playing around with ECUs is serious stuff. If you don't know what you're doing, you could end up damaging your engine or messing up the performance. So, get some expert advice before you go making any changes.

HmSo, let's dive into the scaling situation you mentioned. The default scaling in your Tephra V7 XML for WGDuty is set with some specific expressions and values. The toexpr is set at x/2, while frexpr is x*2. This affects how the numbers are displayed on the table. The min value is -150, the max value is 150, and the increment is 0.5.

Now, here's the thing: if you change the toexpr and frexpr, it will only impact the number display, not the actual resolution. Increasing those expressions to make them twice as big might make you lose that 0.5 adjustability. However, if it's possible to achieve this, it could potentially give you more precise control over the boost levels, allowing adjustments as small as 0.25%.

 

im familiar with the ecu and working with it as well as moding it. the capabilities of the ecu was also on of my concerns but i have seen things like this done for other tables ie. the tephra big maps for timing and fuel. i have also read other threads where you can change where you want resolution at in your table. making 4k-8k have more adjustments verse 0-4k. for the 16 levels of rpm on the X axis of the wgdc you can theoretically customize which areas you want more customizing on having 12 levels from 4k-8k and only 4 levels from 1k-4k. also if you have ever seen the SD 3D mapping table really exploring the limits of the ECU and increasing tuner control on stock ecu. this is mostly food for thought and some experimenting i would like to try. i think if this is doable then running a 4 Port boost controller would be much easier to tune on a stock ECU and provide much greater boost control to people who run bigger turbos with external wastegates. this allows for a smaller springs to be run with out sacrificing overall boost like a 3 port. also done some reading and tuners have experienced better spool with a 4 port.