Custom OS for 2011 camaro

[TRock]

How do I get the custom OS for my car? What benefits do I get other than fan control? Will I have to do a complete re tune?

[SultanHassanMasTuning]

on E38 PCM you will have to retune the MAF i believe

[MikeOD]

on E38 PCM you will have to retune the MAF i believe

On the Camaro's the MAF table is left alone as it already goes to 15K hz and already has a limit of 4000 g/sec...not really any need to "enhance" that lol...the VE table will be completely blank, as it didn't exist in the stock OS, so you'll need to tune that if you don't want to run MAF only. Other than getting a VE table (with axes you can define yourself), and fan control, there's really no benefit to the custom OS on an NA engine. And if you figure out how to use the Bluecat virtual VE program and run a stock thermostat, there's really no need for the fan control axis change or the VE table.

[10_SS]

the VE table will be completely blank, as it didn't exist in the stock OS, so you'll need to tune that if you don't want to run MAF only. Other than getting a VE table (with axes you can define yourself), and fan control, there's really no benefit to the custom OS on an NA engine.

You will probably need a rough tune in the VE table as it probably wont start with the "empty" values (0's).... mine didn't until I put a base VE tune in it copied from another LS3 2bar tune, even in MAF only.

[MikeOD]

You will probably need a rough tune in the VE table as it probably wont start with the "empty" values (0's).... mine didn't until I put a base VE tune in it copied from another LS3 2bar tune, even in MAF only.

I don't think you were properly commanding MAF only then...mine fires right up with the enhanced OS and a blank table in it...that said though, you can use the Bluecat tool to build a VE table based on your stock coefficients to start from.

[Bill@HPTuners]

I don't think you were properly commanding MAF only then...mine fires right up with the enhanced OS and a blank table in it...that said though, you can use the Bluecat tool to build a VE table based on your stock coefficients to start from.

Our head engineer(who creates all the custom operating systems from scratch) has stated in several threads that you should enter a valid VE table, there might be a few operating systems where it works with them 0'd out but its highly recommended to map the ve table properly.

[Bill@HPTuners]

How do I get the custom OS for my car? What benefits do I get other than fan control? Will I have to do a complete re tune?

The OS tab, click on the 2 bar custom operating system. Step by step instructions are found in the help file www.hptuners.com/help though. Here is what is listed in the help file as far as features:

2.5 Bar MAP - Speed Density (E38 ECM - LS2 and other engines)
This enhancement contains the following features:

• 2.5 bar (255 kPa) max MAP sensor support (calibration capability for GM 0-5V linear MAP sensors)
• Rescaled High MAF table supports up to 15400 Hz with 300 Hz resolution, also supports airflow up to 1024 g/sec
• New VE tables with 33 x 33 cell resolution each and configurable MAP and RPM axes (choose your own resolution)
• Charge Temperature based VE multiplier table, configurable axis
• TPS based VE multiplier table, 33 x 17 cells with configurable TPS and RPM axes
• MAP referenced "Boost Enrich" table
• Boost Enrich MAP threshold and hysteresis value
• Both MAF and Speed Density mode supported
• Boost based fuel cut, selectable MAP threshold cuts fuel to all cylinders when exceeded
• Rescaled fan temperature axis 163-250F (73-121C), stock is 192-250F (89-121C)

The MAF High Freq table has been rescaled to allow up to 15400Hz at 300 Hz resolution and the maximum airflow limit for this table has also been adjusted to allow up to 1024 g/sec (instead of the stock 512 g/sec). You must populate this table for the engine to run at moderate speeds with the MAF enabled. An easy way to do this is to copy the values that line up from the old table (every 4th value) and then interpolate/smooth between values. Please note that although the table now extends up to 15400 Hz, the stock MAF may not function accurately at such high airflows nor may it be able to actually output such high frequencies accurately, you may need a differnt MAF or aftermarket unit to achieve this high range.
There are three new VE tables. Two Normal tables (one for the intake manifold control open and the other for closed) and one Displacement On Demand (DoD) VE table. For vehicles that do not have inatke manifold control and/or DoD it is a good idea to set all three VE tables the same. The VE tables are empty by default, you need to populate the VE tables before use even if you plan to use the MAF (the VE tables are used during MAF mode as well). The VE multiplier tables can be used to change (multiply) the VE value based on Charge Temperature (Manifold Air Temperature) and TPS/RPM. The TPS Multiplier table can be useful for tuning large camshafts. On various tables the RPM/MAP/TPS axes are configurable, you can set the resolution to suit your application. The defaults are suited up to around 10psi boost (175 kPa) with 5 kPa MAP resolution and 200 RPM resolution from 400-6800 RPM.
Boost enrichment functions as per our other enhancements, with and enable MAP, hysteresis and Boost Enrich table. Boost enrichment also triggers open loop fuelling. The ECM will use the richest of the PE table and the Boost Enrich table values when fuelling.
The new Boost Fuel Cut feature will cut fuel to all cylinders whenever boost is above the enable MAP value. There is also an enable/disable option for this feature. It is a complete fuel cut to all cylinders when active. Note: in VCM Scanner the Fuel Cut Type PID will report "Flood" as the type when the boost fuel cut is activated.
NOTE: The default MAP Sensor linear and offset values are set for common 2bar MAP sensors, you may need to adjust these values for your particular sensor. If you plan to use the enhancement for non-boosted applications you will need to return the MAP Sensor Linear/Offset values to stock (typically 94.43/10.33 for a GM 1bar sensor).

NOTE: The largest MAP sensor the E38 ECM will support is 2.5 bar (255 kPa).

[HartRod]

Bill - How do I get a custom tune?(ECM and TCM)

[Bill@HPTuners]

Custom operating system(check the OS tab in vcm editor.

Custom tune-a tunershop or tune yourself using hptuners ;-)

[HartRod]

Custom operating system(check the OS tab in vcm editor.

Custom tune-a tunershop or tune yourself using hptuners ;-)

Thanks Bill. Can you take a look at my thread and let me know what you think. My software, will be here tomorrow, .
http://www.hptuners.com/forum/showth...addle-shifters

My apologies for hijacking thread.

Rob

[TRock]

Thanks for the help guys.

[TRock]

I am in the process of building my LS3 to a 416, with that said would I be better off leaving it like it is or would the custom OS allow me to get it dialed in better?

[TRock]

Bill, is there anyway I can view my tune parameters in the custom OS before writing the OS to the ECM?

[SultanHassanMasTuning]

once you upgrade your OS you must do a SAVE AS and create a new file, reopen it and you can view everything before your write ENTIRE!

[TRock]

Thank you sir

[flavorwrench]

once you upgrade your OS you must do a SAVE AS and create a new file, reopen it and you can view everything before your write ENTIRE!

If the custom OS overwhelms after the write entire, I assume you can revert back with a write entire of the previous calibration file?

[flavorwrench]

Not to hijack this thread, but I too need to clarify what custom OS to select for my 2012 ZL1 17psi boost... is the E67 2.5 bar choice the right one?

[SultanHassanMasTuning]

^Flavorwrench, you do not need to upgrade your OS, as your PCM already has boost control setting. and your MAP sensor is scaled for 3 bar

[SultanHassanMasTuning]

yes you can

If the custom OS overwhelms after the write entire, I assume you can revert back with a write entire of the previous calibration file?

[flavorwrench]

yes you can

Cool thx for the response. I might enable it and take a look anyway, I really want to continue to learn this.