So, I made a couple of adds and mods to the extended PIDs.
DPF differential pressure: For those of you still with DPF, there is a differential pressure PID. There is still pressure loss downstream, but it is a smaller effect. I built that so I could do something even more interesting for those without DPFs.
Turbo Drive Pressure: It takes the exhaust manifold pressure and subtracts the DPF differential pressure reading, to estimate the net pressure on the turbine. So, all you alphabet soupers can just have that 2nd pressure port disconnected - open to ambient air - and you will get the differential pressure of the entire exhaust after the turbo.
Boost Pressure: TDIwyse and I were breaking some spare parts he had (inside joke, sorry) when I realised a modification could be made to improve the original version. I think this one does a better job at higher psi. Let me know if you agree.
H20/Meth Target: Based on lots of testing and research, this PID sets a target H20/Methanol injection flow, for a 50/50 mixture. It gives cc/min, the same units used to size nozzles. Using a ratio for diesel/H20/Methanol, this should get you in the ballpark (no way it can optimize every setup).
Now you still have to figure out how to control the flow to meet the target.
For anyone with fuel rail pressure manipulation (JBD and the like), this may under predict maximum flow. Finally, I should note if you go up in methanol concentration, watch those exhaust temps. If you are using less than 50%, say windshield fluid, then you may need to adjust the "25" multiple to "20" or less.
Hopefully, some enterprising folks can give feedback for further fine tuning. I'd like to include AFR and exhaust temp at some point, so this becomes a very useful H20/Meth tuning tool.
As before, strip the "txt" suffix from the attached file, so Torque can recognize it. See instructions in earlier posts on where to paste it.
Here's a listing for those that have difficulty getting the attachment into Torque:
Name,ShortName,ModeAndPID,Equation,Min Value,Max Value,Units,Header
0-0 BMW 335d Ambient Air Temperature,AAT,146,((A-40)*1.8)+32,0,50,°F,Auto
0-0 BMW 335d Intake Air Temperature,IAT,10F,((A-40)*1.8)+32,0,100,°F,Auto
0-0 BMW 335d Charged Air Cooler Temperature,CACT,177,((B-40)*1.8)+32,0,100,°F,Auto
0-0 BMW 335d AFR,AFR,124,((A*256)+B)*0.00044225,0,30,AFR,Auto
0-0 BMW 335d Air Mass,Air Mass ,110,((((A*256)+B)/100)*0.132276),0,50,lb/min,Auto
0-0 BMW 335d Ambient Air Pressure,Baro,133,A*14.6959/100,13,15,psi,Auto
0-0 BMW 335d Intake Boost Pressure,Boost,170,(((((D*256)+E)*0.3125)-1000)/1000)*14.6959,0,35,psi,Auto
0-0 BMW 335d Exhaust Manifold Pressure,Exh Press,173,(((((B*256)+C)/10)-1000)/1000)*14.6959,0,50,psi,Auto
0-0 BMW 335d DPF Pressure,DPF Press,17A,((B*256)+C)*0.00146959,0,5,psi,Auto
0-0 BMW 335d Drive Pressure,Drive Press,,(VAL{0-0 BMW 335d Exhaust Manifold Pressure})-(VAL{0-0 BMW 335d DPF Pressure}),0,50,psi,Auto
0-0 BMW 335d H2O/Meth Target,H2O/Meth Target,015E,((A*256)+B)*25/60,0,2000,cc /min,Auto
0-0 BMW 335d Fuel Flow,Fuel Flow,015E,((A*256)+B)*0.0938,0,160,lb/hr,Auto
0-0 BMW 335d Exhaust Temperature Pre DOC,EGT Pre DOC,178,(((((D*256)+E)/10)-40)*1.8)+32,0,1400,°F,Auto
0-0 BMW 335d Exhaust Temperature Post DOC,EGT Pre DPF,178,(((((B*256)+C)/10)-40)*1.8)+32,0,1400,°F,Auto
0-0 BMW 335d Exhaust Temperature Pre SCR,EGT Pre SCR,178,(((((F*256)+G)/10)-40)*1.8)+32,0,1400,°F,Auto
0-0 BMW 335d NOX Conc Pre SCR,NOX Pre SCR,183,(((B*256)+C)*0.032044)-100,0,1000,ppm,Auto
0-0 BMW 335d NOX Conc Post SCR,NOX Post SCR,183,(((D*256)+E)*0.032044)-100,0,1000,ppm,Auto
Enjoy!
