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  1. Sure. We've done it like that in the past. We can...

    Sure. We've done it like that in the past. We can do whatever customers want. The JB4 side is easy but its a lot of work to go through and modify every load position on the flash side. I personally...
  2. If you disable the throttle safety there are a...

    If you disable the throttle safety there are a few ways you could force boost over set point. Just scale gain up 30% and zero out I for example. It's effectively duty cycle tuning which is what I've...
  3. You could raise gain (P) too high which would...

    You could raise gain (P) too high which would force boost over target, the same way too high of a base duty cycle would force boost over target, but it would not change the set point and duty cycle...
  4. When boost goes over the DME set point everything...

    When boost goes over the DME set point everything load related is effectively clamped. Unless boost goes over target in which case the JB4 would also throw the DME boost over the DME set point. So...
  5. I've read this a few times and I'm having a hard...

    I've read this a few times and I'm having a hard time following your train of thought. When boost exceeds the measurable range then from the perspective of the PID boost is at the upper limit of that...
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    Ah OK if there is already a thread on n54tech...

    Ah OK if there is already a thread on n54tech I'll just check that out.
  7. I don't have the energy to read the above post at...

    I don't have the energy to read the above post at the moment. I will muster it up after lunch. But in the mean time can you post the CSV file, or datazap if you prefer, showing DME boost set point as...
  8. We've designed the JB4 to be a simple system that...

    We've designed the JB4 to be a simple system that can be adjusted without the need of special tuning knowledge. Basically hiding much of the programming and complication from the end user and instead...
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    Do some logs on map 5 and lets see where that...

    Do some logs on map 5 and lets see where that winds up boost wise for the E35.
  10. Yes for some reason the Cobb N55 maps are awful....

    Yes for some reason the Cobb N55 maps are awful. I tried to run one just to get a dyno comparison between their OTS map and our N55 JB4 maps and it was so bad I didn't post the comparison as I...
  11. It's basically the same environment as the N54....

    It's basically the same environment as the N54. Except that its very turbo limited so higher boost targets are less of a concern. The Cobb software is also less limiting for the 2011 models that can...
  12. Myself with help of Russell @ BMS designed a...

    Myself with help of Russell @ BMS designed a completely independent PID system that IMHO is more elegant and better than the factory one. So I'm pretty familiar with the nity-gritty details. :) Just...
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    The same flash can be used. Are you running map...

    The same flash can be used. Are you running map 5? Log?
  14. Glad to see a discussion on boost control here! A...

    Glad to see a discussion on boost control here! A fully active PID system with dynamic targets, either load based targets such as the DME employs, or absolute targets such as the JB4 system uses,...
  15. I shift it around 6800rpm. Same issue crops up...

    I shift it around 6800rpm. Same issue crops up when it shifts itself, too.
  16. 6.21s on this lower boost run, and also 5.86s at...

    6.21s on this lower boost run, and also 5.86s at the same boost level, but on a -2.5 slope.
  17. Correct! Thanks.

    Correct! Thanks.
  18. Wow that's my first neg rep in at least a few...

    Wow that's my first neg rep in at least a few weeks. :'(

    Coming out to Willow Sat for roll racing?
  19. Results look good! That boost control issue is...

    Results look good! That boost control issue is odd. Although at the very low gain it seems PWM and boost is smooth, at least. With less timing I bet you'd see even more power!
  20. Great timing here. It just so happens we have a...

    Great timing here. It just so happens we have a need for back end flashing our large turbo S55 to boost pressure to the DCT. It would be a fun collaborative project & if we can get the maps working...
  21. Was able to get out to a private track for some...

    Was able to get out to a private track for some 60-130 testing. Good news and bad news.

    The bad news is the DCT is going to be an issue. I had to lower power to around 570whp to prevent the DCT...
  22. If it wasn't potted you could just run the tmap...

    If it wasn't potted you could just run the tmap signal to it ... .
  23. You'll notice in the log target is held low until...

    You'll notice in the log target is held low until meth is at full flow. So trying to draw conclusions from boost vs. RPM isn't going to be overly accurate. Spool is maybe 300-500rpm worse than stock...
  24. Yes but don't expect much power from that setup....

    Yes but don't expect much power from that setup. 91 octane is awful. If you can only run 91 octane I would not bother upgrading turbos at all.
  25. It's internal sensor maxes out at 26 or 27psi. So...

    It's internal sensor maxes out at 26 or 27psi. So it just holds those values when exceeding it. It's not a huge deal as the JB4 is still monitoring fuel control and adjusting trims as needed. But...
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