Subaru H6 engine factory trigger (engine position sensors)
Do the Subaru H6 engines use HALL,HALL,HALL position sensors ?
- from below ("capturing with both polarity") => indicates HALL,HALL,HALL
- A guy from Latvia is ordering some (bare mainboard) for Subaru H6; Without good instructions (no wiki page unfortunately), but he seems to suggest 4*VR sensor inputs... is that reasonable for H6 ? (actually, he says "Subaru 6h", but that might be a typo)
- 4*VR would be good for SubaruEj (where the pictures and scopeshots clearly confirm VR sensor), but perhaps VR interfaces not needed for H6 (HALL is simpler, just some filtering and protection)
- any photo of the H6 wheel (or scopeshot) ?
InputTrigger/SubaruThirtySixMinusTwoMinusTwoMinusTwo (that has been supported for a long time) is very similar, but Subaru Engine H6 pattern is actually different (19, missing, 10, missing,missing) and this very arrangement only supported from firmware 1.2.12
Easy to start from a 4 cyl config and select "Triggersettings Subaru 36-2-2-2 (H6)" on the bottom of "primary trigger dialog" (VemsTune >= 2013-03-07), but if you have old "subaru 36-2-2-2 with camsync" config, the main setting to change is (IMPORTANT):
"Ignore sectrig pulses above" = 94
- for geeks (who edit/verify .vemscfg file) secignore=5E (hexadecimal 5E, or 5F)
From 1.2.12 most likely other patterns of the same concept are also supported with proper config (with or without camsync, but normally used with camsync - essential for VVTI anyway).
Patterns, configfiles, etc...
[H6 Benchtest related files] - including config, log while running, and triggerlog
- was working fine with a wide window for sectrig position: the bottom image as a starting point (fully retarded cam), and also with an extremely big cam-advance
Engine works! However there quite often camshaft angle measurement jumps for huge angle like it would be measured in previous half-cycle. But it happens only at low rews <2500.
- Maybe the pulse comes late so you need to use a different measure tooth value ? A higher value ?
- It happens only at low rpms. Above measurement do not jump at any cam possition. IIRC minimal angle was 30 or 40deg - not too close. And wrong measurement seems comes from following revolution where cam signal occurs shifted 120degries (3 tooth per cycle).
Here is my trigger settings http://www.vems.hu/files/GintsK/Subaru%20H6%20trigger/subaru%2036-2-2-2_H6_AVCS.txt. Copy it under C:\Program Files (x86)\VemsTune-xxxx\configlets\trigger and then trigger config is accessible from drop-down menu. Left camshaft sensor as primary. Tooth 0 in ref table belongs to 6th cyl.
- vvt subarus have two cam HALL inputs
- newer engine with variable intake camshafts + VTEC-alike lobe switching use 3 evenly slots (240 crankdeg) on each camshaft.
- the non-vvt only have one camshaft
Two triggerlog files for old "dumb" H6 (== non-vvt ?, or captured with cams fully retarded ?). Files are captured with falling/rising secondary (HALL type)
Picture shows difference between both above files:
Note: the sectrig pulse (should come every 2nd crankrot!) is watched in the ~100 crankdeg window before the "lonely tooth" (assuming "Ignore sectrig pulses above" = 94).
Therefore the edge (especially sectrig edge, if sectrig is used) should be selected to match the BOTTOM picture (Gints, is that Rising or falling edge ?)
- no sectrig pulse within the 10-pulse primtrig-group (when the cams are fully retarded)
- when the sectrig cam is advanced (if it can be advanced at all), sectrig pulse might come within the 10-pulse primtrig-group (but between tooth 2..9, so not as early as tooth 0..2)