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Holley HP Closed Loop Boost Controller Base Duty Cycle Table Help
Hey Guys,
I'm running a 78/75 turbo on a 6.0 with a T56 and the Holley HP system. Mostly because I had bought it before the Holley Terminator system came out.
I'm just trying to make sure I have my head 100% wrapped around the closed loop boost controller tables. I've watched Matt's videos quite a few times and have learned a ton from them, however his videos mostly cover the Terminator X so he sets his up a little differently. The Boost vs RPM or Boost vs Time makes sense to me. Currently I'm Boost vs RPM, but I think I'm going to change to Boost vs Time for better boost control off the line.
What I want to make sure I understand is the Base Duty Cycle Table under the Map Control Setup tab.
Pic from one of Matts videos
How do you guys go about dialing in this table? I'd imagine theres going to be some method of say to make a run on gate in open loop and see what you make for boost. If I have the 6psi springs in it should make 6psi on gate, then repeat with putting some other duty cycle numbers in until I'm at my max desired boost and then fill rows between the knowns? I'm swapping to a 4 port controller so I can go back to the 6psi spring vs the 12 so I have a little more control.
Last edited by 70DusterDev; Oct 21, 2022 at 02:42 PM.
So I’m order to run map + dome and have it operate correctly, you need to gather some data first. You’re correct in that you need to make several runs at different duty cycle settings (or dome pressures if applicable). Record what boost it makes at each step in dome pressure or duty cycle whichever you’re using. From there you’d populate that table. The more accurate the data, the better it’ll work. My target and actual boost levels almost sit directly on top of one another.
Also, take gate spring ratings with a grain of salt. Gate priority, size, location etc all have an affect on final boost. Boost could be close to the advertised rating, but don’t be shocked if it’s not.
Thanks! I'm running just MAP. No dome. So now being home in front of my tune, it looks like the tuner at the dyno actually set me up as Manual Boost. I'm not sure what all those settings do, but if I wanted to go to boost vs time, with a manual trans on the street will it still build boost over gate and activate just from when it starts to build boost? Or do I need a switch of some sort to activate the time vs boost? Or since the master enable box isn't check it doesn't need a signal to initiate?
Any idea what these settings are? Is this saying the car wont start building boost over wastegate until 75% throttle?
IMO boost vs RPM or speed would work great. For boost vs time, yes, you need a trigger. The “75%” you’re referring to would be the trigger in that case. Note: When you’re in the software, across the top there’s a “help” tab. Drag it over what you’re wondering about and it’ll take you to that part of the instructions.
So the boost vs rpm won't need a trigger then? You think thats a better option than the manual boost? Thanks for the help tip as well!! I'll try that out!
No, boost vs rpm doesn’t need a trigger. I’ve run boost vs time, boost vs rpm per gear, boost vs speed and manual and they all work great. You’ll just need to tweak. I’m currently in boost vs speed on the street and it’s fine. Boost back time at the track.
Thanks for the responses! Boost vs speed is out for me because I'm not using the speed sensor on the trans. At least not right now. I have a GPS speedo but being back in VT it definitely cuts out here and there lol.
So for Manual it seems like its almost the same as Boost VS Time but the timer is activated by an internal trigger being the TPS. If this is the case, why wouldn't you want that TPS % trigger to be like 5%? I'd only run 1 stage so none of the staging info pertains to me.
Or am I misunderstanding what the trigger initiates? If you have the TPS to start the timer say at 90% throttle if you cruised around making pulls, is it meaning it will only build wastegate spring boost until you hit 90% throttle? Then that trigger will initiate the Boost vs Time table allowing the boost controller to start working? Also meaning mine currently doesn't start working until 75%?
Last edited by 70DusterDev; Oct 24, 2022 at 02:00 PM.
Just an update for anyone who is watching this to learn for themselves, I talked to Holley tech on the phone yesterday, and they said it works exactly as I thought. And if the engine setup is able to build more boost than gate before 75% throttle than that is the setting you'd adjust to build more boost sooner.
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Holley HP Closed Loop Boost Controller Base Duty Cycle Table Help 
