Originally Posted by
QTR FMS
i have been messing around with lexus 2019 twin turbo i still havent figured out on how to tune a diesel but i have made a progress yesterday,
for fuel in the main injector tab there is a injector pulsewidth table i added 20% in the 55mm? area first it was good for stock boost 18psi then i had to get it to 35% total for 23.5psi, its way too rich when shifting that is backfire from 1st to 2nd shift,
for boost its base duty cycle egr off and on,i increased duty cycle max egr on and off to match the base duty cycle table, i did change desired boost base egr on and off to 25psi it didnt have any effect but i think it did help to keep the boost on higher rpm not 100%
increased map limit a max to 320kpa and boost limit a and b to 25psi there was no effect too,
i did change the fuel pressure for main only from 129 to 155 and maximum pressure limit from 129 to 155 but i see with your tune you are already at 175 not sure if there is any gain if you increase it your maximum which is 196.5 or even more
i couldnt get the timing to increase there was one pull which the timing went higher not sure if its because of what i did or not
if anyone is familiar with tuning diesel i would appreciate the help