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Terminator x max multiple boost targets

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Old Feb 28, 2024 | 05:55 PM
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Default Terminator x max multiple boost targets

Just got a term x max for a current project. Downloaded the software to play around with it and familiarize myself with it and make a base tune.

Was playing with boost control settings and trying to set up different boost levels on a switch.

I see where if you were running dome only or pwm you can set an input and make custom table with offset target dome pressure. But if I wanted to run boost vs dome for closed loop boost control there isn't an option for offset target boost.

Is there a way that I'm not seeing?
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Old Feb 29, 2024 | 08:42 AM
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i dont quite understand your problem.
when i had a terminator x you had to tee your map sensor into another input to use manifold pressure as control. you set that extra map input as dome. its kind of a bullshit thing holley did not letting you select the existing map for boost control like you can do with dominator.
then you make an advanced table to offset the target boost using whatever input you want.
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Old Feb 29, 2024 | 09:25 AM
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Agree on the map sensor mapping part and not being able to use it as a pressure input for boost control... dont get why they wouldn't let you do that

I do have a dome pressure sensor... but my issue is not being able to offset target boost via an input... it seems I can only offset target dome pressure. And if I understand it correctly you set your target boost then use a target dome pressure as a starting point for the PID loop for boost control strategy. And changing the target dome without changing target boost would not give you differnt boost settings and only cause some overshooting or oscillations in boost curve since the PID now has to work harder
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Old Feb 29, 2024 | 05:14 PM
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Are you talking about using a rotary switch or something that would allow you change boost levels on the fly?
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Old Feb 29, 2024 | 05:23 PM
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Yes exactly
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Old Feb 29, 2024 | 07:19 PM
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It only uses dome pressure for boost control. It doesn’t look at manifold pressure at all that’s the whole reason for the dome sensor.
dominators have some nested pid loop think that uses both but the terminator x does not
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Old Feb 29, 2024 | 08:23 PM
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There is dome only and boost vs dome.

Boost vs dome let's you set a target boost and a dome pressure target. And from the way I am thinking it works(possibly wrong) you set a boost target and then a dome pressure that is close to what it would take to hit that target boost from which the pid loop takes over to maintain that...?

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Old Feb 29, 2024 | 08:28 PM
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Are you using v3? I haven’t looked through that version yet
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Old Feb 29, 2024 | 08:53 PM
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Yes this is in v3. I see in older versions there was only dome target. So being able to target boost is cool and would be even cooler if I could put an offset via a switch or dial.

Might just take some playing around once I actually get it up and running
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Old Mar 1, 2024 | 10:46 AM
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I don't believe that option gives you a real closed loop PID control system for boost, I think Boost vs Dome on the Term X is just a limiter if the max psi is exceeded. You should still be able to use a rotary to offset the boost target but need to keep in mind the max psi table at that point.
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Old Mar 1, 2024 | 12:08 PM
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Yea thats what I'm realizing. It's more just a cap... kinda lame.

if you set the dome at a slightly higher pressure target than what would achieve your target boost then it might work more closed loop style helping maintain throughout the rev range maybe... won't be boost by dial but at least it will target and maintain (or at least try) a manifold pressure instead of a pressure on the gate
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Old Mar 1, 2024 | 12:22 PM
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i was curious about this so i just downloaded v3 to check it out and agree with what you guys found. its just a max boost limiter and otherwise works the same as dome control
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Old Apr 3, 2024 | 03:24 PM
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Better to control boost via Holley or run a dedicated boost controller like eBoost or Boost Leash?
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Old Apr 4, 2024 | 11:49 AM
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Matt (sloppy mechs) has some kind of setup for diff boost settings, some kind of dial inside the car.
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Old Apr 5, 2024 | 02:15 PM
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Originally Posted by forcd ind
Matt (sloppy mechs) has some kind of setup for diff boost settings, some kind of dial inside the car.
Was just going to say this. OP, check this out: https://www.sloppymechanics.com/prod...p-dial-a-boost
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Old Apr 14, 2024 | 05:58 PM
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I am doing this with a customer and a Terminator X. We added the AEM 12 positions switch:
https://www.aemelectronics.com/produ.../parts/30-2056

Then you can do an advanced table to offset boost vs. switch position.

Andrew
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