NEED HELP WITH 98 Camaro AUTO VE TUNING
I've got a stroker motor to tune in a 98 camaro. It was a 4l60 but now it's a t400...not sure if i should use a stick o/s or the existing auto o/s...
Pluss, I need to "AUTO VE" this thing....I don't find anything in the tutorial on this o/s or on the forum....
Can you point me in the right direction? The Ve tables have different resolution between the Backup and Main...
I haven't had to do this one before....and I'm kinda lost.....any advice or custom os or something?
Chuck CoW
I'll keep you posted.....
Quote:
Originally Posted by SSpdDmon
First, we need to clarify something. The VE here just has to be close if you plan on turning the MAF back on. It's there to back the MAF up incase of failure or when it's response is limited (transitions, low airflow, etc.). Tuning a pre-'01 car in SD is simply done with the backup VE. Get it close enough (+/- 3%) if you can. Then, copy the x0kPa columns from the back up VE to the main VE individually. Fill and hand-smooth the gaps for the x5kPa columns. I usually set the 105kPa column equal to the 100kPa column. The 15kPa row can be guestimated by following the trend for each RPM row. Re-enable the MAF and move on. Once the majority of the MAF is dialed in, look at idle and your transitions. If you transitions and idle are lean/rich, increase/decrease both VE tables slightly (+/- 2%) in the respective areas to eliminate the issue. Don't sweat the small stuff too much or you'll go insane. Tweak/finalize the MAF and be done. Just my $0.02.
Thanks, I'm workin on it now....
chuck
Think of it like this.....
Quote:
Originally Posted by Garry
I still don't see your problem --- if you set up two BEN maps, one with the units of the BackupVE table, one with units of the MainVE table, there should not be any problem with the paste&multiply ... !?
Ok, I was sort of confused at first....Take it from the begining with the basics of "auto VE on a 98"
Set up speed density tune....(knowing that the main VE is disabled and the backup is to be used)
log a run with the BEN CALC factor....
The BEN CALC FACTOR is ONLY based on the values the pcm is presently using (BACKUP VE) and your LM1
SO, when you copy/paste the BEN CALC over the BACKUP VE you have the BACKUP VE (which is the table that is fueling the motor durring this procedure) being modified by what we know to be the corect amount based on the wideband.....
When you take the other map (ben calc with matching lables for the main VE) WHAT IS IT THAT THESE NUMBERS REPRESENT????
You are likely gonna paste the ben calc table from the scanner and past it over the main VE right? BUT, think about it....If the motor is not fueling from the main VE, but rather the backup....then (although it FEELS right) the numbers in the main ve are wrong.... REMEMBER WHAT WE ARE DOING AND WHY.....The ben calc is based on the difference between what is commanded in the backup VE (assuming SD) and the actual results of the wideband....(ie. these values ONLY represent the error of the backup ve....SO OF WHAT VALUE IS IT TO PASTE the BACKUP VE OVER THE MAIN VE if the Main VE is turned off and not functioning....???
Follow me here....This is turning into some sort of paradoxial time wharp episode of the twilight zone where you stand between two mirrors and try to count how many copies of yourself you see in the 2 mirrors...:nixweiss:
EVERYTHING FEELS RIGHT...or is it????
I'm not looking to pick a fight or challenge anyone here....but, we're doing all this work based on the backup VE with limited resolution and the motor is only gonna see all this hard work if the MAF happens to fail....right?
I'm trying to get the MAIN VE to within 0-3%.....but.....doing it like this is likely to produce 2 problems.....error in excess of 3% and big fluctuations...or at least unnecessary ones.....
To sum it up...When AUTO VE TUNING in SD MODE...the MAIN VE IS DEAD.
ANY OPERATION done using the BACKUP VE ben calc numbers (regradless of weather you're scanning BEN CALC in two different tables or not) is apples and oranges....they LOOK related..but, really have nothing to do with each other....Just cause you're scanning a BAN CALC table that LOOKS like the MAIN VE does not mean the numbers are valid...
Here's the deal....While you can do this to come CLOSE....I'm aspiring to get my MAIN VE between 0-3% and I just don't see how it is possible (although it might "feel or look good" to do it this way)
HEY ROSS! What do you think about a custom o/s for 98 that does not reference the backup VE in SD mode???? Should be easy right? Just like restoring dual spark maps! right??? :master:
Stay Tuned,
Chuck CoW