G4 boost control change

[Mike@N54Tuning.com]

Hey guys,

One of the changes with the G4 board is the boost targeting is absolute instead of floating like it is with the G3. Meaning that instead of targeting a certain percentage over the stock target it will now target a specific PSI curve. So no more dropping boost in cold weather, hitting 14psi some days, 16psi others, and not knowing why, etc. Originally BMS wasn't sure if it would be possible with the G4 and was going to save it for the PRO board, but after a few late nights has come up with a great new algorithm based on a variety of CAN data. Of course the PSI target will still vary based on a variety of inputs (or not, if you prefer), and is nicely reflected in the new 'target' parameter.

Here is a short log of some WOT runs concatenated together from early in the testing. Before the feed-forward system was added to the PID.

Mike

[SlicktopTTZ]

Holy shit, that is worlds better.


THANK YOU TERRY! Exactly what I have been wanting, without having to buy a Proceede or Standback 2.

[ARES45]

Not really sure what this means... But I can't wait for my JB3 to arrive.

[JHOOPS2]

I am picking my JB3 up at the post office today. Can't wait for the G4 upgrade.

-Jeff

[bryce]

Originally Posted by Mike@N54Tuning.com

Hey guys,

One of the changes with the G4 board is the boost targeting is absolute instead of floating like it is with the G3. Meaning that instead of targeting a certain percentage over the stock target it will now target a specific PSI curve. So no more dropping boost in cold weather, hitting 14psi some days, 16psi others, and not knowing why, etc. Originally BMS wasn't sure if it would be possible with the G4 and was going to save it for the PRO board, but after a few late nights has come up with a great new algorithm based on a variety of CAN data. Of course the PSI target will still vary based on a variety of inputs (or not, if you prefer), and is nicely reflected in the new 'target' parameter.

Here is a short log of some WOT runs concatenated together from early in the testing. Before the feed-forward system was added to the PID.

Mike

hey mike, just out of curiosity, what does upgrading to the G4 board entail for people running a pinout jb3? i know it's $80, but do you get a new wiring harness or do you just replace the board in the case? thank you in advance,

[Mike@N54Tuning.com]

Originally Posted by bryce

hey mike, just out of curiosity, what does upgrading to the G4 board entail for people running a pinout jb3? i know it's $80, but do you get a new wiring harness or do you just replace the board in the case? thank you in advance,

Its mainly a board upgrade... More details will follow.

Mike

[doogle]

Do you have an estimated release date yet? I was about to order the usb cable, but might as well get both at once if it is coming any time soon.

[Remonster]

Originally Posted by doogle

Do you have an estimated release date yet? I was about to order the usb cable, but might as well get both at once if it is coming any time soon.

Don't quote me on this but I think I remember Terry saying G4 would be coming next year.

[Mike@N54Tuning.com]

Originally Posted by Remonster

Don't quote me on this but I think I remember Terry saying G4 would be coming next year.

The G4 is slated for sometime between Halloween and Thanksgiving for the public baring no major setbacks. They are doing local alpha testing now. Although it's not as much of a departure as the upcoming PRO board will be still plenty to long term test on it.

Mike

[JHOOPS2]

I installed the JB3 last night, Map 5 + BMS drop in filter = Wow!

Nuff said.

-Jeff