TOYOTA SUPRA V6 biturbo
- 6 cyl , 2.5 L
- 2 turbocharger
- low impedance injectors
- VR primary trigger
- stock 12 toothed crankwheel (30 crankdeg per tooth)
Engine started with 1.1.11. Needs tuning.
Dangerous idea - DO NOT remove a teeth
An idea was to remove 1 tooth (black circle) => 12-1 toothwheel.
There is some risk of an abnormally high amplitude VR signal at the missing tooth. Scope (or soundcard) recording of this trigger is definitely a good idea.
Camsync 1 pulse is available (otherwise an M8 screw would do it, used with GT101 HALL sensor, see sensors in WebShop), see InputTrigger/MultiToothNoneMissing and treat it as 24 + 1 setup (as if 24 was on cam; but 12 on crank is better timing precision, of course, because no cambelt sloppniness).
Q: MembersPage/PhatBob what model of Supra is this from? All the Toyotas I've seen have a 12 tooth per crank revolution and one or two cam sync's. I have a fair bit of toyota info so if you could give me the engine number I'll see what I can find
A: 1JZGTE engine. It has two cam sync.
- You should be able to use these triggers without modifying the crank trigger as this is, believe it or not, the same trigger pattern as you find on the Honda, Mazda RX7 and other Toyotas. With this trigger and cam sync you should be able to run semi-sequential and wasted spark very easily.
Config for 1.1.11 firmware
1.1.x firmware
- early 1.1.0 to 1.1.10 only supported missing tooth wheels (with or without camsync) and 135 tooth auditrigger
- since 1.1.11 also supports the simple none_missing toothwheel. This is actually simpler than the missing tooth code. It is configured as "coiltype", but several variable that were "don't care" earlier now are important
- primary_trigger=07 # coil type, filtering, rising edge. Alternatively 06 would be falling edge (could be suitable for HALL, but not for VR)
- secondary_trigger=19 # camsync, rising edge; alternatively 1d is same, but with filtering
- tooth_wheel=18 # decimal 24 tooth (between cam pulses)
- trigger_tooth=01 # or upto 03
- ign_tdcdelay=C4 # 98 crankdegrees
- another_trigger_tooth=04 # 24 tooth / 6 cylinders
- tooth_width is allowed to be higher than 64 degrees. The missing tooth width is the upper byte. (there is no missing tooth anyway). Use 0 if the tooth distance is less than 64 degrees.
- tooth_wheel_twidth2=00
- tooth_wheel_twidth1=78 # decimal 120, that is 30 crankdeg per tooth
These should not surprise anyone:
- RPM constant for 6 cyl = 2000 (=0x07d0)
- rpmk[0]=07
- rpmk[1]=d0
- alternate=15 # injgroups 5 .. 0 (fire all banks during cranking)
- ignchmax=05 # ignition 5..0
- reset_engphase_after=40 # since camsync is used
- h[1]=00 14 10 0C 08 04 .. ..
- h[2]=10 60 50 40 30 20 .. ..
- This table assumes that after ignch1: ignch2, ignch3, ignch4, ignch5 and ignch6 fire in this order. Which is recommended, but not actually wired this way in the Supra installed by Fero.
After the (secondary trigger) campulse (taken from the middle cam transceiver; not the other cam transceiver at cyl6 that was 360 crankdegrees offsetted), the (primary trigger) cranktooth is named tooth0 (first, topmost entry in the example h[1] reftooth table). Tooth 4,8,12,16 and 20 follow, in this order (going from bottom to top in MegaTune).
128 degrees (trigtooth=1 + ign_tdcdelay=98 crankdegrees) after tooth0 we have the TDC of cyl2 (connected to channel 1 in our example, that is 0x10 in the first entry of the h[2] ignition output table ).
I tried these settings on a 24+1 Toyota 3S-GTE distributor without success, I also tried with a signalgen file.
The config, tables and zipped wav test file are here:
http://vems.hu/www.vems.co.uk/VEMSTrigger/config.txt
http://vems.hu/www.vems.co.uk/VEMSTrigger/tables.txt
http://vems.hu/www.vems.co.uk/VEMSTrigger/C006_800_60_5_1000_1000.zip
I cannot be sure that the hardware is faultless.
Please confirm that the settings are correct in config and tables
as I will try a known good Hall 24+1 systemt tomorrow
Thanks.