Notes from the bench
Calibration notes, unlock workflow, and GM OS work — written the same way the files are: first-person, from THE engineer, no fluff.
Welcome to the Preux Power bench notes
Custom OS started on GM P59 — unlock workflow, OS work, and bench notes from Preux Power.
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E-Ray doing some work
E-Ray doing some work
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C8 Twin Turbo Antilag Operation #antilag #antilagc8
C8 Twin Turbo Antilag Operation #antilag #antilagc8
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Bolt on Turbo Kit 93Oct eRay
Bolt on Turbo Kit 93Oct eRay
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World's quickest C8 tuned by PreuxPower #stockecu #noPort #noMeth
World's quickest C8 tuned by PreuxPower #stockecu #noPort #noMeth
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P01 / P59 Custom OS Idle — Part 3 (Derivative Timing / Dashpot)
Derivative timing control for ramp-down on overlapping cams — plus wideband CL and launch work on these OS builds.
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P01 / P59 Custom OS Idle — Part 2 (Trailer Hitch & Timing Blend)
Interpolated timing between tables with filtering so idle transitions stop hitching.
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P01 / P59 Custom OS Idle — Part 1 (Throttle Cracker → Idle Airflow)
Where a lot of us started: rewriting P01/P59 idle to work more like E38, including Idle Airflow vs RPM.
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Custom OS on E38 / E67: IAT Retard vs E85+
Ported an E92-style IAT retard vs E85+ table onto Gen IV E38 / E67 Custom OS (including OS 12653249).
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Custom OS: Floating Parameter → Float Table + DMA PID
A small Custom OS exercise: one floating parameter became a float table with editable axis, logged as a DMA PID.
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Idle Routine — Torque Reserve & Larger Duration Cams (Part 4)
Big cams, reversion, and why less timing / more blade opening / Torque Reserve calms idle surge.
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Idle Routine — Idle Airflow & Minimum Idle Airflow (Part 2)
Idle is a strangling of airflow. Minimum Idle Airflow sets a floor, not a target.
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Idle Routine Tables Explained (Gen IV E38 / E67) — Part 1
How idle torque/HP concepts map to Gen IV GM idle routine tables — E38/E67 (and often E40/E92).
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Testing Testing 123.
Testing Testing 123.
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E99 Custom OS: Full Boost Control (Ethanol / Throttle / Gear / Mode)
Upcoming E99 Custom OS: PI boost control vs ethanol, throttle, gear, and Tour/Sport/Track modes — no external boost controller.
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