Here are some tools I use to assist with getting the 3x MAP and MAF calc's tuned.

If you are having headaches while developing custom tunes for EvoX platform, especially the SST equipped vehicles, this might help.

It's important that calculated load is relative to actual engine torque output on the EvoX in order for the whole mess to work correctly. I have seen other tuners modify target AFR and timing tables and have dyno #'s but driveability is complete **** because the load calculations weren't done correctly to begin with, and all fuel/timing table load references are wack. The 4b11 runs great, even with mediocre tuning. But it runs beyond amazing with excellent tuning!

Download link for modifying MAP based load calc tables.

There is one % based modifier table that adds / subtracts to all three tables and outputs their respective values to the last three sheets.

Also translates PSI to LOAD for easier translation of values from COBB datalog's.

Download:
https://db.tt/NhD5ccFv


Here is a link for a MAF calibration table. Fairly self-explanatory, paste current MAF values in one of the rows and use the %change to achieve target load value per MAF volts. This supports 4 separate MAF calibrations for easy copy-pasta and visual reference.

Download:
https://db.tt/oVC4JHp5


Long live your sleeves and connecting rods. Hopefully someone finds this useful!

 

This is great! can't believe no one has commented on this yet.

 

I may have to try out fixing my MAF soon. I am a fairly experienced tuner with the LNF (Saturn Sky, Pontiac Solstice, Cobalt SS), but I have zero experience on the Evo. I'm using OTS maps at this point and I know my fuel trims are borderline too high with my ETS intake.

Thanks for posting this!

 

TKromer, I have tuned several cars with the ETS intake and find that 8-10% addition to all the load values in the MAF cal table is a good starting point. Keep in mind that the ECU uses the MAF for open-loop load calculation as well, when fuel trim's are not applied. It is very important (esp on an SST car) to scale the high load areas of MAF/MAP correctly.

I always start by making table AFR all the same AFR value in high load, say 10.6AFR.

Use a wideband to compare table requested AFR vs. actual AFR, and then adjust the MAF scaling to make them more or less the same at WOT. Use the formula (Actual AFR) / (table AFR), and then apply that as the multiplier / percentage increase for those areas in your MAF scaling.

Example: 11.2AFR wideband measured, 10.6AFR requested table = 1.06

You would increase the MAF scaling by about 6% so that your measured AFR is = requested. Once the car is hitting your table requested AFR's consistently, you can start tuning areas and be confident that the car will run whatever AFR you stick in the fuel maps.