Guys, need your advise. I decided to check how my car's engine is running because it's winter time (outside is -18, next weekend is going to be -32), and the car was tuned at +20.

I was very surprised of realy low load. Peak boost is 1.47 (boost off) bar or 21.32 psi (on HKS evc6 boost controller), but peak load is only 218. Air temperature is -11 on the MAF sensor. In summer load was 255-260 at similar boost.

The strange thing is, that the ECU takes timing from 240-260 cels.

Any ideas why this is happening ?

Car spec's are:

Evo 9 GT (89280002 rom) with GTX 3071 turbo + cosworth m2 cams + ID 1000 injectors, custom intake piping, big intercooler.

 

I think there is a temperature adjustment table for calculating load. Because it is so cold, it might be outside of the range that is well calibrated. That is just a guess!

 

What load are you logging? 2-byte?

 

Possibly have a Tephra v7 patch with 1byte load set to 1.4 and evoscan formula set to 1.2?

EDIT: nvm, noticed you have the small maps.

-Jamie

 

2 bite load.

 

I was logging 2 bite load, the car is Evo 9 GT with 89280002 rom, so Tephra rom isnt possible.

 

fugured out, there are 4 2 bite loads

2-byte LOAD_Raw (no temp compensation)
2-byte LOAD_Temp_Compensated
2-byte LOAD_Baro_Compensated
2-byte LOAD_Temp_and_Baro_Compensated

2 Bite load adresses for 89280002 rom

6b12 6b13
6b14 6b15
6b16 6b17
6b18 6b19

The ECU uses the following logic to find the lookup info it needs:
Fuel maps will either use Load_Raw OR LOAD_Temp_and_Baro_Compensated depending on an certain conditions
Ignition Maps will either use LOAD_Baro_Compensated OR LOAD_Temp_and_Baro_Compensated depending on the MAF IAT

Also, guys, does anyone know what are the conditions for different load usage ?