ok. good to know that. also when I hit calculate coefficients it sends a block of values into negative. what is going on with that?
ok. good to know that. also when I hit calculate coefficients it sends a block of values into negative. what is going on with that?
once it is very close then you can smooth it a little bit. if you smooth something that is still off into the good data then it won't work.
Do you use the stft+ltft method or the pressure ratio?
My plan on a street VVE tune would to be to do a scan or 3 at say idle-2000, get that working then work up in maybe 500rpm increments. Worked in my real VE days.
I am still having issues with this and it has prevented me from going ANY further. I believe there are other issues as well. I'm at a point in my tune where I really can't go any further until i can do a solid VVE tune. ON the 2 occasions i did try, when I dialed it in below 2000rpm before it would screw up the, ride and throttle response was perfect.Sooo my torque,timing and VE/MAF must have been close seeing that i had less than 2% on the trims. It was that good.
Ive been suspicious of this form the beginning of trying to tune my C7 and it's hard to believe this is not known by the staff. Ive manually mapped out my zone boundaries and still get the errors and outrageous conversions. My cells are 1 to 1,so if i copy from 1.22 at 3100rpm it pastes at 1.22 at 3100rpm...etc. Something is definitely wrong. It could be a problem with certain versions of windows and hardware. Maybe even something related to certain PCM batches......windows and hardware but the problem no doubt exists in some combination or it would be more widespread
I always tune VVE....
2016 C7 M7 Z51
Callies ultra billet crank
Callies ultra billet rods
Diamond pistons
Jhonson high speed lifters
Ported and polished headwork
Custom cam
YSi-V7
Factory Stock 97 SS M6 13.51 @ 104.3 mph
Stock Longblock LS1 w/ 233/238 P.S.I. Cam
10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago
'99 TA trunk mounted 76mm 6 Liter
9.0s in '09 @ 153 MPH
Turbo 5.3 Volvo 740 Wagon
32psi and still winding out 5th on the highway somewhere
I smooth areas that are off significantly more and then smooth section before calc coefficients. That way it brings them more in line.
Issue i'm having is even after getting my VVE in line (still in SD MAF failed), my predicted v.s. delivered is -10LB.FT off everywhere. Coincidence is if you take my stock VVE table and add 10% to the whole thing, it more or less lines up with my version of the table which I calibrated the same way you guys do.
So what i'm wondering is if my truck is requiring 10% more fuel via the VVE table, it prob needs 10% more of everything. What else should I be adding 10% more to? DD table? Peak torque table? Somethings gotta get these numbers to line up...
2023 Ford Maverick 2.0T AWD
I just tried another round and still the same problem. I can get my idle perfect, trims pretty much 0, timing steady at 17*, throttle good, torque matches. Take a small drive to gather error data, copy and paste special ,multiply by % and out the window it goes. I'd be happy to post up a video if someone is willing to help to see if in fact I am doing something wrong.
I am also getting boundary errors. If someone can elaborate on this maybe it would help me along. What is it checking it against? My rows and axis in the editor match 100%, my row and axis has been changed via the options in the VE editor to a 3 bar map. What else might need to be changed in the editor besides changing the rows and axis in the VE editor to match.
Here is what I did...
Changed out my stock MAP to the red label, adjusted my MAP characteristics accordingly, left MAP estimation alone along with the other settings AAP1,2,3 and it is set to NI-TIAP. Went to my VE table changed the options to 3 bar, copied row and column axis to my scanner to match then on to scanning.....
Am I missing anything anywhere?
I always tune VVE....
2016 C7 M7 Z51
Callies ultra billet crank
Callies ultra billet rods
Diamond pistons
Jhonson high speed lifters
Ported and polished headwork
Custom cam
YSi-V7
Ill help where I can.
The boundary errors: they check only within themselves. If you have an obscure value it will throw out the whole thing within that boundary. Forcing you to start over
My question: do you adjust vve and maf in the idle areas while in gear, rolling, or while actually idling?
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Guys this one piece of info would help me. Do I let it idle when doing maf only in idle Hz? I know if I do this it would idle better but I want to do this the right way not the easy way.
Looking to let the ecu calculate things properly as possible. I’m not looking for a shortcut I feel like I’ve flashed this thing a million times in the last month, but I see the light at the end of the tunnel
Last edited by nicul15; 06-06-2019 at 09:58 AM.
Thank you!
Thanks for getting back. I kind of figured that and I guess its something we can't really see. I always kind of figured that and thats why early on when i was copy/pasting so I would always copy a VE to a blank excel spreadsheet.Because I did notice early on that some zones are different within the same model/year even. I have even gone back to the original file to start over with the same results
This is the last piece of the puzzle for me.......for now. The car runs great on my MAF tune. No surging anywhere, but when I do the few low rpm scans before it screws up and run both, you can tell it is more polished, more in regards to the throttle response. The low speed lag just went away.
I always tune VVE....
2016 C7 M7 Z51
Callies ultra billet crank
Callies ultra billet rods
Diamond pistons
Jhonson high speed lifters
Ported and polished headwork
Custom cam
YSi-V7
One thing i just now noticed....
I'm running a 3 BAR MAP so i set my VE table accordingly. If I set it to a 1 BAR map the problem goes away but does me no good since I'm boosted.
What am i missing???
I always tune VVE....
2016 C7 M7 Z51
Callies ultra billet crank
Callies ultra billet rods
Diamond pistons
Jhonson high speed lifters
Ported and polished headwork
Custom cam
YSi-V7
It would be awesome if Howard could get Greg B. in here to assist