Gobal B wont open throttle into boost.

[4wheelinls1]

2022 SILVERADO_NN SCIAP NN _WP SC Gobal B .hptSCANMAPADDED.22.hpl2022 SILVERADO_NN SCIAP NN _WP SC Gobal B .hptSCANMAPADDED.22.hpl

Hi, any suggestions on this Global B Silverado. Supercharged, camshaft fixed cam. Larger DI pump and CAM lift only atm.

The NN numbers look good but the only way I can get the throttle to open into boost is to set the MAP setting to NA-MAP, which gives horrible throttle response and yanks fistfuls of timing. Added SCIAP which is working and logs. I haven't had this issue with Global A and have managed to get another Global B into Boost before without SCIAP sensor. I am wondering if there is a missing PR clip?

Any suggestions appreciated

[TrkNrrs]

2022 SILVERADO_NN SCIAP NN _WP SC Gobal B .hptSCANMAPADDED.22.hpl2022 SILVERADO_NN SCIAP NN _WP SC Gobal B .hptSCANMAPADDED.22.hpl

Hi, any suggestions on this Global B Silverado. Supercharged, camshaft fixed cam. Larger DI pump and CAM lift only atm.

The NN numbers look good but the only way I can get the throttle to open into boost is to set the MAP setting to NA-MAP, which gives horrible throttle response and yanks fistfuls of timing. Added SCIAP which is working and logs. I haven't had this issue with Global A and have managed to get another Global B into Boost before without SCIAP sensor. I am wondering if there is a missing PR clip?

Any suggestions appreciated

The way I rectified this is on my 2023 Silverado Magnuson 2650, was I added a smooth boost. It?s an electronic bypass valve, and it connects to the accelerator pedal, when you?re floored it?s closed when your off it?s open. Give the pedal 50% the bypass is closed 50%. It?s $1000 but it?s sweet as hell, you?ll like it. Gives you all your pedal response back, and also comes with an optional knob to control boost pressure if for some reason you want to turn it down.

[4wheelinls1]

The way I rectified this is on my 2023 Silverado Magnuson 2650, was I added a smooth boost. It?s an electronic bypass valve, and it connects to the accelerator pedal, when you?re floored it?s closed when your off it?s open. Give the pedal 50% the bypass is closed 50%. It?s $1000 but it?s sweet as hell, you?ll like it. Gives you all your pedal response back, and also comes with an optional knob to control boost pressure if for some reason you want to turn it down.

Does it actually log full throttle or is it just bringing boost in at less throttle? I would be concerned with what Im getting ATM the throttle would just keep closing until the PR was under 0.8. It seems to peg the VE at 1.0 and not go beyond.

[MeanMike]

Engine-Torque Management-SC/TC General - Change Type fitted back to None. I don't know if that's the fix, but that doesn't need to be set. I think I read it's to read the IAT2 which the E90 doesn't have an input for.

[TrkNrrs]

Does it actually log full throttle or is it just bringing boost in at less throttle? I would be concerned with what Im getting ATM the throttle would just keep closing until the PR was under 0.8. It seems to peg the VE at 1.0 and not go beyond.

It drives like a stock truck until I give it WOT. Before the smooth boost, it would make 14psi soon as started to give it gas. 2200rpms I?d have 14psi..

[4wheelinls1]

Does it actually log full throttle or is it just bringing boost in at less throttle? I would be concerned with what Im getting ATM the throttle would just keep closing until the PR was under 0.8. It seems to peg the VE at 1.0 and not go beyond.

I will try that, I have had it set at Supercharger on Global A without issue but the p0106 relates to IAT, MAP, MAF errors so possibly that it's looking for an absent sensor might be it.

[4wheelinls1]

Engine-Torque Management-SC/TC General - Change Type fitted back to None. I don't know if that's the fix, but that doesn't need to be set. I think I read it's to read the IAT2 which the E90 doesn't have an input for.

Interestingly the car did go into boost, only a small amount. Still limited by the throttle. The logging doesn't quite add up as I am well shy of the axle TQ request but the log says the request is 130% and the TQ delivered is 130% even though the request. There is a fixed engine reference TQ at 582 Nm, that seems to be the limit I'm at. It's not in the software.

;Silverado log.png Ill raise a ticket. Pretty common in Euro stuff to have a reference TQ.

[TrkNrrs]

Interestingly the car did go into boost, only a small amount. Still limited by the throttle. The logging doesn't quite add up as I am well shy of the axle TQ request but the log says the request is 130% and the TQ delivered is 130% even though the request. There is a fixed engine reference TQ at 582 Nm, that seems to be the limit I'm at. It's not in the software.

;Silverado log.png I?ll raise a ticket. Pretty common in Euro stuff to have a reference TQ.

You?ve definitely got some weird shit going on my friend. If you get tired of fucking with it, Branden Leeb at Elite Tuned, tuned my truck. He can remote tune it for you and it will run very very good.

[will_974]

From what i can gather, it looks like the vehicle is going into a Sensor failsafe mode
This happened to me at one point. Basicaly it sees a bad sensor state and then modulates the throttle to prevent the engine from hitting boost.

The first thing that jumps out at me in the log is the SCIAP never moves from 99kpa, which needs to be addressed.
Is it wired correctly? In the calibration I see the values are set correctly for the SCIAP sensor, so I assume thats not the issue.

I would first double check wiring, maybe log sciap voltage, which should correctly coorespond with inlet pressure.

Then I would suggest re-enabling AAP sensor tests 1 and 2, ensuring they both pass.
The issue that is happening is being masked by DTC's being disabled in this way.

Also, I do not recommend setting he Supercharger fitted switch on Silverados. They are missing an air temp sensor.

[TrkNrrs]

From what i can gather, it looks like the vehicle is going into a Sensor failsafe mode
This happened to me at one point. Basicaly it sees a bad sensor state and then modulates the throttle to prevent the engine from hitting boost.

The first thing that jumps out at me in the log is the SCIAP never moves from 99kpa, which needs to be addressed.
Is it wired correctly? In the calibration I see the values are set correctly for the SCIAP sensor, so I assume thats not the issue.

I would first double check wiring, maybe log sciap voltage, which should correctly coorespond with inlet pressure.

Then I would suggest re-enabling AAP sensor tests 1 and 2, ensuring they both pass.
The issue that is happening is being masked by DTC's being disabled in this way.

Also, I do not recommend setting he Supercharger fitted switch on Silverados. They are missing an air temp sensor.

If he?s running the Magnuson 2650, it should have a box that plugs into the maf wiring and has IAT, BARO and MAP broken out.

[will_974]

On second look.
Try this calibration and let me know if it works any better.
I adjusted a few things to help with the p0106
As well as bumped up commanded power,
With the theory that it is holding itself back

2022 SILVERADO_SCIAP NN TQ Idle and TQ model_Commanded_power_change .hpt

[4wheelinls1]

On second look.
Try this calibration and let me know if it works any better.
I adjusted a few things to help with the p0106
As well as bumped up commanded power,
With the theory that it is holding itself back

2022 SILVERADO_SCIAP NN TQ Idle and TQ model_Commanded_power_change .hpt

You were 100% correct, shame HP doesn't have those tables. I need to trim the NN now as its overshooting which may the reason behind the poor throttle control. Certainly, the best it's been, now get 100% throttle.

Many thanks.

[ATTACH]157425

[will_974]

You were 100% correct, shame HP doesn't have those tables. I need to trim the NN now as its overshooting which may the reason behind the poor throttle control. Certainly, the best it's been, now get 100% throttle.

Many thanks.

Happy to help!
The log looks good!

I am very surprised that HPT has not located the Commanded Power Vss vs Axle torque table.
As more and more vehicles go to using Axle torque in the driver demand tables, its more and more limiting to not have that table defined.
In your case, the Commanded power table was commanding stock engine torque levels even though axle torque requested was increased.
So All i did was bump up the table to be more inline with what you needed.

Its not difficult to trace out to locate. I genuinely think they should put effort in there to locate that as well as the "Use Axle Torque for DD" switch.

[tonn0297]

Hey Will my biggest gribe with HPT is so many things are not defined or wrong.. Im comming from the 3d printing comunity where open source is very well respected, wuld it make sense / benefit to make a repo with all known user defined variables? or is there too much "i found it so its mine" or "i want money for finding it" to make that happen?
Esp also with emi*ions stuff, they have removed all the parameters, but if the user defined parameters we culd get arround that... just a thught..

[will_974]

Hey Will my biggest gribe with HPT is so many things are not defined or wrong.. Im comming from the 3d printing comunity where open source is very well respected, wuld it make sense / benefit to make a repo with all known user defined variables? or is there too much "i found it so its mine" or "i want money for finding it" to make that happen?
Esp also with emi*ions stuff, they have removed all the parameters, but if the user defined parameters we culd get arround that... just a thught..

The percentage of things that are not defined is larger than you may believe. It is a extensively steep ramp up to get the set that HPT provides.
I am very thankful for their Tools that they provide. However, the issue is that the endeavor by nature is not open source since it involves OEM Tables from OEM hardware.

There are some resources that have a small collection of xdf files, but they are not very extensive because of the high cost to enter.
I encourage you to try to locate tables and search for such resources, the resources are available but they are not user friendly.
You will find that many people spend years sifting and sorting to get to a set of tables that is useful to the community.
That amount of labor makes it difficult to just give it to HPT, for them to profit on.

I have started a course on how to do some of the initial table locating, But I have not opened it up to the general community as of yet.

[veeefour]

HPT have all the definitions required to tune Global B properly, including TB closing.