MembersPage/Fero/SUPRA (2007-11-07 00:47:45)

TOYOTA SUPRA V6 biturbo

Engine started with 1.1.11. Needs tuning.

Igncut.als is logged since firmware 1.1.8 ("A" command offset 52). Meaning: 0 .. 16 (0 is no igncut, that is normal operation). It just needs to be logged from MegaTune (new MT release will have it from factory - scheduled 2007-02-10).


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 ).


The car is running now with Firmware_1.1.11, and we made the base tuning on it. We we'll take it onto the local DYNO soon. Here are the working config files:

[config.txt]

[tables.txt]

[Megatune_msq_file]


POWERSHIFT request:

I wish, that VEMS could be able to do real powershift. This is a variation of shiftcut. Many racecars using this method with great results! Here it is:

I tested this system in cars with other ECU-s. Surprisingly great effect. Shifting is very short, very accurate, and the boost pressure never falls, it's consantly the same from the first gear till the last gear. Please implement this great system into VEMS! Thanks!


NOS

We need to use NOS in the car, so i have some ideas about it.Here is how i think about VEMS with nitro:

Positive, negative modification is needed because on this way, this solution could be used with water injection systems too!

I think this system could provide great NOS control for us. Please implement it into VEMS.Thanks!