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Could anyone suggest an ECU able to run V12 engine with 12 independent ignition coils, not a wasted spark?
I am getting closer to installation of the 1GZ engine into my BRZ and ECU question is very important for me now as I need time to source the hardware and prepare the wiring loom.
Originally this engine was running on two ECUs but it is to complex task to make it work in the different car.
I would be grateful for any help on this matter.
A MoTeC M150 or M190 will do it, and can control the cams. Are you using Drive-By-Wire?
Yes, forgot to mention. It is double throttle DBW layout.
Link G4 Thunder can also handle 12 cylinders if I remember it correctly...
There are other options you can have, if you find you can't find an ECU that does full sequential for the engine - or if it's exobitantly expensive!
Run it as a two six cylinder engines with two independent ECUs, like the OEM setup. While this may seem complex, most of the same work will need to be done whatever method you use.
Run it in semi-sequential form with the intake, and exhaust, camshaft controls running the heads in parallel and the ECU firing the injectors for half the fueling on each revolution with each ignition control switching two coils as for each cylinder at firing there will be another on the exhaust stroke.
Why are you against wasted spark? What do you think you are missing out on? Obviously it limits your ECU choice a lot, so it may be worth considering if it really is requirement. In general it is not until you get above about 8000RPM that you may start to run out of cycle time for long dwell and spark duration with wasted spark systems.
The Olivecrona 1GZ is still wasted spark with a Link making around 750Hp @ 9500RPM when it was naturally aspirated and now over 1000Hp at low boost still wasted spark.
Ah, had just remembered that - there was an extensive article on the engine, and build, in RaceCar Engineering a couple of years ago, if you can track down a copy.
This was in the suggestion box, which may also be of interest - https://www.youtube.com/watch?v=kt8iWnrzodc
Great videos about V12 Supra building process - I've seen all of them. They are under manufacturing of real intake and exhaust manifold based on plastic models printed on 3D printer. Unfortunately I didn't hear anything about ECU planed to be installed and its definitely should be something similar to what I need. That project has even 4 fuel rails and 24 injectors!))
Doing a researches for the last few days I am coming to a use of waste spark ignition most likely, if Adaptronic guys will not offer me what I am looking for. Fuel injectors can be paralleled, so no problem. Two DBW throttle control is also possible to find within after market ECU..
How about 4 knock sensors? As I understand they should have individual inputs and I do not see any maker is offering more than 2?
Again, the MoTeC M150 and M190 offer 4 knock inputs, can drive both DBW throttle bodies, individual coil triggers for 12 cylinders. What's not to like?
Price is always a concern, but you know my opinion - if the 'cheaper' alternative doesn't do what you need, it's one of the most expensive things you can buy.
Most of the larger and (arguably) more motorsports oriented ecosystems all will support that with their upper tier offerings. David mentioned Motec's M1s that will support it, Emtron has their kv12, Lyfe/syvecs I believe have theirs, and George mentioned that Link has an option but I'm not familiar.
Generally at that level of support/build quality I find its most important (if you're doing it yourself) that you're familiar with the software and find it enjoyable and flexible to use. If you're paying someone else, obviously it'd be whatever they're most comfortable with so long as you get the feature set you want.
Still waiting for Adaptronic response. I've just realised that Andy, who worked before for Adaptronic is at Haltech now, what makes me think I won't get quick answer from sales and support.
Reviewing my targets I can say that I definitely don't want to run V12 as 2 independent engines. This leading me to get rid of 2 MAF sensors and replace them with MAP as well as switching to one DBW throttle, after new intake plenum manufactured. We stick to 6 wasted spark coils as per OEM design and 12 injectors paralleled. However I still worried about 4 knock sensors) Can it be practical to connect one from each bank front and rear to ECU and other two to independent knock monitor, just in case? Or maybe there are some user specific inputs at certain ECUs which can be utilised for this purpose?
Haltech adsorbed Adaptronic, buying Andy out as owner and employing him as technical lead. You should still get a decent response from them. Given many of the excuses capable of running the engine will have windowed knock monitoring per cylinder, do you think you really need 2 per bank? I'm far from experienced but a lot of OEM'S whose tunes ride the knock limit, fuel dependent only run one sensor per bank?
With the knock sensors, you may be putting too much emphasis on there being four - if I understand the OEM configuration correctly, each ECU would have used two for monitoring. So, if you run two individual ECUs, which you seem to have decided against, you could copy that - if using a single ECU, you could probably just use two or, if there is support, all four.
MoTeC M150 with the Toyota 86 Engine Swap Package loaded, so that you also retain the factory OEM functionality in the vehicle, if you so want.