MembersPage/Fero/SUPRA (2015-01-01 07:00:00)

TOYOTA SUPRA V6 biturbo

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.

Toothwheel.jpg

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.


Config for 1.1.11 firmware

1.1.x firmware

These should not surprise anyone:

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.