EQ <> VE Version 3

[Bill@HPTuners]

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

Already in the process of doing so.

[SilverG]

The way I tune my car using my program is to NOT do any sudden throttle movements.

I try not to either. The problem is high load/low rpm. I have to stab the throttle even with doing 2nd gear pulls. I will try some 3rd gear ones to see if it helps or hook up the travel trailer.

Still, does anyone know what controls transients when running VE only?

Already in the process of doing so.

Great! Any idea when? Days, Weeks, Months, Years?

[PerfectD3]

Hey Bill, I know you guys are working hard to put this into your software because I saw you had posted that up before. I appreciate y'alls efforts. My question was when is it going to be available?

[Bill@HPTuners]

Great! Any idea when? Days, Weeks, Months, Years?

It was already partially in beta a few weeks back, we took it out temporarily but it should be back in soon.

[ktoonsez]

I try not to either. The problem is high load/low rpm. I have to stab the throttle even with doing 2nd gear pulls. I will try some 3rd gear ones to see if it helps or hook up the travel trailer.

Use a combo of 3rd, 4th, 5th and 6th. Use at least 2-3 of those gears to get an average. I always try to use 3-5 to get that averaged out. Wish I knew about the transient stuff, let me know if you get an answer as what and how to adjust that.

[eficalibrator]

I try not to either. The problem is high load/low rpm. I have to stab the throttle even with doing 2nd gear pulls. I will try some 3rd gear ones to see if it helps or hook up the travel trailer.

Say it with me, folks: "Load bearing dyno"

Still, does anyone know what controls transients when running VE only?

Fuel to wall impact/evap factors, but only after you've got the right steady state data in the VE surfaces. If you fudged the VE surface (either real table or virtual result from coefficients), then you're going to have a hard time nailing the transients.

[SilverG]

Say it with me, folks: "Load bearing dyno"


Fuel to wall impact/evap factors, but only after you've got the right steady state data in the VE surfaces. If you fudged the VE surface (either real table or virtual result from coefficients), then you're going to have a hard time nailing the transients.

I know, I am saving my money to take your class instead.

Ah, that's what the Transient tab is for! Makes sense now.

Is there a difference between the use of these tables if in MAF, SD, or MAF&SD mode? Worth taking the time to figure out what to change if FTs are 7-8%?

[eficalibrator]

Is there a difference between the use of these tables if in MAF, SD, or MAF&SD mode? Worth taking the time to figure out what to change if FTs are 7-8%?

Fuel trims have nothing to do with transients (if done right), and shouldn't care if you're SD, MAF or blended. Likewise, transients shouldn't care if you're SD or MAF either. Each physical phenomena within the engine has its own tables.

[Braciole]

How long did it take for you guys to get to this point????
Learning HPTuners this well My head is spinning
Gotta buy more books I guess

[Ben Diss]

How long did it take for you guys to get to this point????
Learning HPTuners this well My head is spinning
Gotta buy more books I guess

Mike- The next version of HPT will have vitrual VE table tuning built-in. It'll be a bit easier then. Still, you have to set up the tune. Here's some notes I've collected from reading other posts here, and from several books I've read.

To tune VE:

1. Disable things that change AFR.
a. Set Engine.Fuel Conttol.Fuel Cutoff.DFCO Enable Temp to 493.
b. Set Engine.Fuel Conttol.Fuel Cutoff.CFCO Enable VSS to 318.
c. Set Engine.Fuel Control.Power Enrich.PE Enable.MAP to 256.
d. Set Engine.Fuel Control.COT.COT to Disable.
e. Set Engine.Fuel Control.Transient.Transient Fuel Qualifications.Transient Fuel to Disable.
2. Turn off the MAF.
a. Set Engine.Airflow.Dynamic Airflow.High RPM Disable to 8192, set Low to 8000.
b. Set Engine Diag.Airflow.MAF Sensor.MAF Fail High to 0.
3. Make the Spark tables the same.
a. Copy Engine.Spark Control.Spark Advance.Main Spark Advance.High Octane to Low Octane.
4. Prepare the VE table for editing
a. Copy Engine.Airflow.Speed Density tables to EQ_VE program. Save as Equation_in_xxx.
b. Generate a table, save it as Equation_out_xxx and copy it.
c. Open a C6 2005 stock tune and open Engine.Airflow.Dynamic Airflow.Main VE and paste the table.
5. Setup the scanner.
a. Log Manifold Absolute Pressure, Engine Speed and AFR Error.
b. Create a histogram
- Name: VE - Air Fuel Ratio Error
- Plot Value: Sensor: Air Fuel Ratio Error
- X Header, Sensor: Manifold Absolute Pressure,
Labels: 15,21,26,32,38,43,49,54,60,66,71,77,83,88,94,99,10 5
Units: kPa
- Y Header, Sensor: Engine Speed
Labels: 400,800,1200,1600,2000,2400,2800,3200,3600,4000,44 00,4800,5200,5800,6200,6800
Units: rpm
6. Start driving. Drive around to warm up the engine before beginning. Watch the coolant temp,
oil temp and valve temp. When they're stable, proceed.
7. Build a VE correction table.
a. Have the VCM controls open and start the log file. Immediately select
- Closed Loop: Off
- Fuel Trim: Off
- Click Reset Fuel Trims
b. Select the histogram and start driving around.
- Use only slow throttle movements
- Don't blip the throttle
- Fill the cells evenly

[G8GT2GO]

Mike- The next version of HPT will have vitrual VE table tuning built-in. It'll be a bit easier then. Still, you have to set up the tune. Here's some notes I've collected from reading other posts here, and from several books I've read.

To tune VE:

1. Disable things that change AFR.
a. Set Engine.Fuel Conttol.Fuel Cutoff.DFCO Enable Temp to 493.
b. Set Engine.Fuel Conttol.Fuel Cutoff.CFCO Enable VSS to 318.
c. Set Engine.Fuel Control.Power Enrich.PE Enable.MAP to 256.
d. Set Engine.Fuel Control.COT.COT to Disable.
e. Set Engine.Fuel Control.Transient.Transient Fuel Qualifications.Transient Fuel to Disable.
2. Turn off the MAF.
a. Set Engine.Airflow.Dynamic Airflow.High RPM Disable to 8192, set Low to 8000.
b. Set Engine Diag.Airflow.MAF Sensor.MAF Fail High to 0.
3. Make the Spark tables the same.
a. Copy Engine.Spark Control.Spark Advance.Main Spark Advance.High Octane to Low Octane.
4. Prepare the VE table for editing
a. Copy Engine.Airflow.Speed Density tables to EQ_VE program. Save as Equation_in_xxx.
b. Generate a table, save it as Equation_out_xxx and copy it.
c. Open a C6 2005 stock tune and open Engine.Airflow.Dynamic Airflow.Main VE and paste the table.
5. Setup the scanner.
a. Log Manifold Absolute Pressure, Engine Speed and AFR Error.
b. Create a histogram
- Name: VE - Air Fuel Ratio Error
- Plot Value: Sensor: Air Fuel Ratio Error
- X Header, Sensor: Manifold Absolute Pressure,
Labels: 15,21,26,32,38,43,49,54,60,66,71,77,83,88,94,99,10 5
Units: kPa
- Y Header, Sensor: Engine Speed
Labels: 400,800,1200,1600,2000,2400,2800,3200,3600,4000,44 00,4800,5200,5800,6200,6800
Units: rpm
6. Start driving. Drive around to warm up the engine before beginning. Watch the coolant temp,
oil temp and valve temp. When they're stable, proceed.
7. Build a VE correction table.
a. Have the VCM controls open and start the log file. Immediately select
- Closed Loop: Off
- Fuel Trim: Off
- Click Reset Fuel Trims
b. Select the histogram and start driving around.
- Use only slow throttle movements
- Don't blip the throttle
- Fill the cells evenly

How are you going to fill the WOT cells?

[Ben Diss]

How are you going to fill the WOT cells?

Not following you here. What do you mean?

[G8GT2GO]

Not following you here. What do you mean?

Auh, I'm really sorry. I should've quoted the last part only

I was talking about the logging part. How are you going to fill the WOT cells? I mean this requires a lot of WOT runs and I mean A LOT. What do you think the number of hits should be for each cell?

[SilverG]

3. Make the Spark tables the same.
a. Copy Engine.Spark Control.Spark Advance.Main Spark Advance.High Octane to Low Octane.

Curious, when doing VE or MAF tuning, what the reason behind doing this?

[Ben Diss]

Curious, when doing VE or MAF tuning, what the reason behind doing this?

You don't want Knock Learn to adjust the spark while you're mapping.

[Ben Diss]

Auh, I'm really sorry. I should've quoted the last part only

I was talking about the logging part. How are you going to fill the WOT cells? I mean this requires a lot of WOT runs and I mean A LOT. What do you think the number of hits should be for each cell?

You'll spend most of your time getting a good consistent reading in the lower cells. A few WOT runs to get some some of the higher end cells populated will provide enough data to interpolate the rest.

Of course, if you have access to a load-bearing dyno the problem goes away.

[firehawk26]

ok , wile am tuning the VE do i need to turn the maf off .

[Ben Diss]

ok , wile am tuning the VE do i need to turn the maf off .

Yes. See post #150.

[Cantalope Kid]

Mike- The next version of HPT will have vitrual VE table tuning built-in. It'll be a bit easier then. Still, you have to set up the tune. Here's some notes I've collected from reading other posts here, and from several books I've read.

To tune VE:

1. Disable things that change AFR.
a. Set Engine.Fuel Conttol.Fuel Cutoff.DFCO Enable Temp to 493.
b. Set Engine.Fuel Conttol.Fuel Cutoff.CFCO Enable VSS to 318.
c. Set Engine.Fuel Control.Power Enrich.PE Enable.MAP to 256.
d. Set Engine.Fuel Control.COT.COT to Disable.
e. Set Engine.Fuel Control.Transient.Transient Fuel Qualifications.Transient Fuel to Disable.
2. Turn off the MAF.
a. Set Engine.Airflow.Dynamic Airflow.High RPM Disable to 8192, set Low to 8000.
b. Set Engine Diag.Airflow.MAF Sensor.MAF Fail High to 0.
3. Make the Spark tables the same.
a. Copy Engine.Spark Control.Spark Advance.Main Spark Advance.High Octane to Low Octane.
4. Prepare the VE table for editing
a. Copy Engine.Airflow.Speed Density tables to EQ_VE program. Save as Equation_in_xxx.
b. Generate a table, save it as Equation_out_xxx and copy it.
c. Open a C6 2005 stock tune and open Engine.Airflow.Dynamic Airflow.Main VE and paste the table.
5. Setup the scanner.
a. Log Manifold Absolute Pressure, Engine Speed and AFR Error.
b. Create a histogram
- Name: VE - Air Fuel Ratio Error
- Plot Value: Sensor: Air Fuel Ratio Error
- X Header, Sensor: Manifold Absolute Pressure,
Labels: 15,21,26,32,38,43,49,54,60,66,71,77,83,88,94,99,10 5
Units: kPa
- Y Header, Sensor: Engine Speed
Labels: 400,800,1200,1600,2000,2400,2800,3200,3600,4000,44 00,4800,5200,5800,6200,6800
Units: rpm
6. Start driving. Drive around to warm up the engine before beginning. Watch the coolant temp,
oil temp and valve temp. When they're stable, proceed.
7. Build a VE correction table.
a. Have the VCM controls open and start the log file. Immediately select
- Closed Loop: Off
- Fuel Trim: Off
- Click Reset Fuel Trims
b. Select the histogram and start driving around.
- Use only slow throttle movements
- Don't blip the throttle
- Fill the cells evenly

Has this been stickied in the Gen 4 section yet?

[roberttimmons]

anybody got an updated download link i wanna try the new version.