EQ <> VE Version 3

[domestic rice]

So is this needed to tune a gen 4 (07 avalanche) VE table? Or does it just make it easier?

[slow67]

So is this needed to tune a gen 4 (07 avalanche) VE table? Or does it just make it easier?

There is no VE table per se......it is derived from using a formula and a bunch of constants. You have to use this to do the VE table.

[SilverG]

I have a question concerning DOD. In my stock tables the DOD open and closed rows have different values from the non-DOD rows. Yet after I “send equations to HPT” all 4 rows are the same. My question is how different is the DOD airflow and why were the stock DOD numbers different from the non-DOD ones?

[ktoonsez]

First off, you shouldn't be using this program for doing tuning on a car with DOD still enabled and in use. DOD requires a different airflow because it is using less cylinders, what is why the rows are different and I did not account for all 4 rows, I simply take the values for the first row and then re-populate them with the same values for all 4 rows. Sorry.

[PerfectD3]

Forgive me for being an idiot, but what is this program for?

[ktoonsez]

No, not an idiot at all. It is for tuning the equations that represent the "old school" VE Table, I just made the program to only account for high performance cars that use the same values in all rows, that all. If you are using it on a car with DOD and still use it, I don't really feel that you need to be tuning these equations unless you have done performance mods to the car that require it and in that case you should disable DOD because it is now a performance car.

[SilverG]

Sorry.

That is what I thought. Because you are changing the zone boundaries and other tables, which affect both DOD and non-DOD, I can’t just adjust the non-DOD, right? Anyway to pin or not adjust the RPM and MAP boundaries? Would that even work? 2 less variables to solve for.

I do want to adjust my VE because I disabled my MAF and the fuel trims ranged from -5 to -19. My choices are I either disable DOD (it gives me a 1-2mpg gain) or I sit and wait for HPT to release the VE virtual table.

Great job on the program.

[ktoonsez]

Typically, the first row is non-DOD which means you will be tuning the non-DOD and NOT the DOD using my program. To disable RPM and MAP boundary changes, unckech the "automatic zone boundaries" in my program.

[Texas_WS6]

This thread is very long, can I use this to help me tune my 02 Trans Am? If not is there anything out there like this that can help me?

[ktoonsez]

This thread is very long, can I use this to help me tune my 02 Trans Am? If not is there anything out there like this that can help me?

No, this is for newer vehicles with no VE table in them. Look at the sticky's and do a search for carneb's write ups for tuning.

[Mep_q8]

i finally actually got my head around using the program! its great! thanks alot... any chance of getting custom pids and formulas for the scanner :P i remember back in the day when i was tuning trailblazers i could set up histos with Map vs RPM vs AFR Error %... this time around it won't be so easy

[auh]

Could anyone help please?
Is this the following process right?
VCM Scanner
1. VCM Scanner: Histogram VE GM Volumetric Efficiency.
EQ_VE
2. Load VE Equation program (EQ_VE3).
3. Copy equations from HPtuner.
4. Generate Table.
5. Open VE Table.
6. Analysis Modifying > Apply HP Scanner Data.
7. Analyze > multiply by quarter > start.
8. Apply to table.
9. Final VE Table as shown in the attachment.

[Pete@SpecialistTuning]

I'm not positive but looks like your using VE data to modify a Cyl Vol table. I'm sure someone with more experience will jump in here soon.
You can try using a percent of the AFR error to modify that table.

Pete

[ktoonsez]

Could anyone help please?
Is this the following process right?
VCM Scanner
1. VCM Scanner: Histogram VE GM Volumetric Efficiency.
EQ_VE
2. Load VE Equation program (EQ_VE3).
3. Copy equations from HPtuner.
4. Generate Table.
5. Open VE Table.
6. Analysis Modifying > Apply HP Scanner Data.
7. Analyze > multiply by quarter > start.
8. Apply to table.
9. Final VE Table as shown in the attachment.

You have the right table format (I.E. the columsn and rows) but your not logging the right data into that table. You should be logging the percentage error from the command AFR to your actual. Or if you don't have a wideband, you should be logging your Short Term fuel trims. You were logging the actual GMVE which are numbers in the thousands, not a % error of AFR.

[auh]

thanks alot for your reply, ill start with STFT for the sake of learning till i get the y pipe and the O2 bung then ill do the AFR % error.

[EC_Tune]

Ken,

Looks like you will be able to do the VVT engines soon with this program. The variable cam stuff was added in the latest beta.

[ktoonsez]

Ken,

Looks like you will be able to do the VVT engines soon with this program. The variable cam stuff was added in the latest beta.

What date was the release? I have the one from April something, is there one from May now? In any event I will check with Keith so I am not double doing the effort.

[SilverG]

When the MAF is disabled and running on VE only, what controls the transient fueling? I have used the program to get steady state (non-DOD) down to -3 to 1% but when I make a quick throttle change to try to hit some of the high load/low rpm cells I see positive numbers as high as 7-8% using LTFT + STFT. Because I am only using cells with 20+ hits the positive transient numbers are either averaged away or do not get applied to the VE.
Maybe it won’t be a problem since I plan on tuning the MAF and leaving it enabled. It is my understanding that with the MAF on the VE numbers are used for sanity checks and transients below 4000rpm.

[ktoonsez]

When the MAF is disabled and running on VE only, what controls the transient fueling? I have used the program to get steady state (non-DOD) down to -3 to 1% but when I make a quick throttle change to try to hit some of the high load/low rpm cells I see positive numbers as high as 7-8% using LTFT + STFT. Because I am only using cells with 20+ hits the positive transient numbers are either averaged away or do not get applied to the VE.
Maybe it won’t be a problem since I plan on tuning the MAF and leaving it enabled. It is my understanding that with the MAF on the VE numbers are used for sanity checks and transients below 4000rpm.

The way I tune my car using my program is to NOT do any sudden throttle movements. You don't want to do any sudden movements so the car can make the adjustments as you move the throttle. This will generate a nice smooth curve and represent the actual fuel needed at every MAP. So once you are fully tuned, the ECM will be able to use the proper numbers for when you do go from 20% throttle to 100%. The ECM will make the decision pretty quickly but you have to remember it still takes time for the extra fuel to reach the engine. Hope that answered your question.

[PerfectD3]

So when is HPT going to add this into their software?