It is related with the subject? Please explain or say nothing?
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Emily89 - I think of them as just another torque management section needing to be adjusted for mods/performance. They can make the transmission shift a little odd or act weird if you raise them to high sure and since the new gen ecms are all toque based if things dont match up the ecm will wig out. So the idea is to not get carried away with them but raise them just enough to get the desired results you are looking for that keeps the ecm happy. But these tables also inhibit max torque because even though your telling the ecm you want to see lets say 500 ft lb torque request in the normal torque management section for peak,brake and overboost the ecm will check that against your virtual torque numbers and determine yes or no to what your asking. That's atleast my understanding and take on it. Maybe someone else will chime in and add or correct anything ive said. But as I said in a earlier post, I couldnt get my Cruze to go above 15 psi taper down to 12 psi or so which was about 200 ft lb actual or lower I believe vs my 500 commanded and now with the virtual torque changes I boost up to 20 psi at 350-375 ft lb actual vs my 500 ft lb request taper down to 17 psi and actual stays around 350 by the end. the threads i saw about it where in the gen5 section
Thank you for that TCSS07. Much appreciated explanation of function. This information would fall into line with how the ecu seems to act regarding other things. Seems everything has to "agree" or be very close to what car actually is doing or wants. Very interesting. I wonder if I keep blended vve/maf I assume should modify at both in virtual torque. I also wonder how e85 table plays into this, as I use that fuel. Must make some changes and go drive to log.
No problem. You will want to adjust the virtual torque for the map based section as well but dont forget to do a,b,c and d. I didnt alter any of the multiplier charts. I just adjusted the charts that effect the actual virtual torque numbers. Keep the changes the same across the board to keep things normal so to speak and make sure you read the description first of which chart your about to change
I'll post the log if I still have it tonight or I'll just make another one. But the it's just ecm torque not actual
Oh ok I understand. I've had similar situations with displaying well over 200 tq on a 1.4 and over 400 tq on a 2.0
its calculated torque and if the models arent correct then the values are off too. i also believe the calculation is crank torque but dont quote me on that.
Yes sir, pretty much take them with a grain of salt. I dont rely on those numbers for anything really other than showing me if the ecm is allowing the increase in power or not.
Using tips here, today I log. I adjust for blended as suggested, I also adjust the E85 portion as I read that if active, ECM will pull from e85 table here in virtual torque. Im left to wonder if that is correct.
The numbers inside of HPT, torque and Horspower formulas, are now very higher. I do not feel the car picked up this power though. This presents a problem for me as I use those numbers to decide if I gain power with changes. They appear accurate before changing virtual torque.
Do you have a Camaro as well? Or different car? and did you make any other changes to the turbo boost section at all besides the vt tables? Post up your tune file as well
boost - I cant find the log and tomorrow im doing the wifes oil change so ill have her car. But weds I will do a log and post it up. Also I would like to inform you that I have another 2017 cruze p0300/misfire cy1. Imagine that
i wouldn't monitor calculated values for hp and torque. i believe one of the values for this calculates torque through finding bsfc and using that to find fuel load which can be turned into what you are looking for. the downside here is bsfc fluctuates wildly with changing ethanol content. if it was fixed then it may not be so much of an issue.
monitor ve lb.hr and/or maf lb/hr to tell you if your moving more air into the engine.
to help verify if an airflow gain is good then you need to monitor your acceleration over time. use the scanner time bar and monitor vss speed on the scope channels. record time at a set mph and compare it to another set mph. most recommend pulling 3rd from 2600 to redline in a stock turbo car.
yeah looking at the maf or ve airflow would be the tell tale if your making more power or not. the virtual torque tables are merely more charts than may be limiting you from making the boost/power your requesting if there isnt anything else limiting you such as knock air mass,torque management,etc. if your getting the boost your commanding then raising the virtual torque tables probably wont do much
id love some advice for my 2018 2.0. zzp intercooler
zzp wastegate atuator
zzp large throttle body
cold air intake
need help tuning please