Thinking of doing an engine swap? Read here first.

[Manji]

I'm happy with the 1UZ option I'm going with. BUT, I did consider a 2jz. And here's a the argument I made, that I found always shutup the knobs that'll try and discredit a jz in a gt86.

"Don't think of it as a gt86 with a heavier motor. Think of it as a brand new supra. A supra thats got more modern lines and features. It's also smaller, and even with the 2jz, it'll be ~200kg lighter than a JZA80. If there was a new supra released, that still had a 2jz, only cost $20k more than a gt86, AND was 200kg lighter, don't you think that car would be popular as fuck? Because that's what I'll end up with."

[slicktop]

Originally Posted by Manji

I'm happy with the 1UZ option I'm going with. BUT, I did consider a 2jz. And here's a the argument I made, that I found always shutup the knobs that'll try and discredit a jz in a gt86.

"Don't think of it as a gt86 with a heavier motor. Think of it as a brand new supra. A supra thats got more modern lines and features. It's also smaller, and even with the 2jz, it'll be ~200kg lighter than a JZA80. If there was a new supra released, that still had a 2jz, only cost $20k more than a gt86, AND was 200kg lighter, don't you think that car would be popular as fuck? Because that's what I'll end up with."

It's died down the past few months but when I first told a few guys about the swap, all I got was negativity.

The 1UZ is going to be nice, it's too bad you aren't in the US! Would be neat getting all the swapped ZN6's together.

[s2d4]

Originally Posted by OmarGC

What I consider working it out: Starting the car with most oem interior functions and not a "hacked" up harness as you continue implying if not motec or whatever youre continuously praising. My swap is near completion, on hold for holidays/vacation.

Cool, shows us how its done, thanks.

Originally Posted by OmarGC

I do know someone stateside who is in fact using a chasebays harness w/aem ems and ecutek to disable dtc's and vss/abs related CAN signals. Ran oem gauge/interior functions early on prior to swapping to a stack mfd.

You mean rh9? Yeah, I wouldn't call that quite as working it out.

Originally Posted by OmarGC

Chase bays has at least a pair of 2jz frs FD cars wired up, I'm sure you're not aware of as well considering you stated only xxx figured it out.

Sure, don't know the full details.

Originally Posted by OmarGC

@slicktop was it also you that spoke to ekanoo running dual ecu/ecutek/stand alone as well?

It appears that only shops have done it so far, some better than others of course. Interested with your DIY setup once you've finished yours.

[OmarGC]

Originally Posted by s2d4

Cool, shows us how its done, thanks.


You mean rh9? Yeah, I wouldn't call that quite as working it out.


Sure, don't know the full details.


It appears that only shops have done it so far, some better than others of course. Interested with your DIY setup once you've finished yours.

You obviously cant read and also must've skipped out on geography.

[SomeoneWhoIsntMe]

there's a bunch of JZ FRS/BRZ drift cars, but none of them are retaining any of the factory CAN bullshit.

[s2d4]

Originally Posted by OmarGC

You obviously cant read and also must've skipped out on geography.

Yeap, surely.

[SomeoneWhoIsntMe]

Maybe I'm unclear as to how the CAN bus protocol works, so please correct me if I'm wrong, but can't any ECU with CAN support that's reasonably configurable talk to the stock BRZ/FRS CAN devices once you figure out what commands you're supposed to be sending?

From what I understand, you could be using megasquirt 3, AEM infinity or probably series 2, motec, hydra, a fucking arduino, doesn't matter so long as it can send and receive CAN.

It's just that the only two shops thus far that have bothered to reverse-engineer the commands sent over the CAN network in the BRZ/FRS happened to have been using motec and hydra.

Or am I smoking crack again?

[AZFA20]

The truth is you don't even need to get into the technicalities of dealing with the CAN system to make everything work on this platform. You guys are way over thinking it. The dual ECU systems are not actually interacting the way I think most of you are under the impression they are. It's simply a matter of intercepting signals from various sensors to make the ABS, Electric Steering, Gauges, and AC work as normal (in the dual ECU systems).

[SomeoneWhoIsntMe]

@AZFA20 that's another point that I was going to make... just because a few people feel that keeping the stock ECU installed to keep the A/C and whatever else happy while running a different ECU to control the engine swap is less preferable for whatever reason, does not mean that it's somehow the "wrong" way, and that spending $9k on a motec setup is _THE_ definitive "right" way to do an engine swap in these cars.

Considering that you can get a swap running for the cost of materials to extend the new engine harness to fit the new ECU wherever you want it and splice it into the factory wiring, NINE THOUSAND DOLLARS is a little bit steep just because you think running one computer instead of two is "cleaner".

[slicktop]

Originally Posted by AZFA20

The truth is you don't even need to get into the technicalities of dealing with the CAN system to make everything work on this platform. You guys are way over thinking it. The dual ECU systems are not actually interacting the way I think most of you are under the impression they are. It's simply a matter of intercepting signals from various sensors to make the ABS, Electric Steering, Gauges, and AC work as normal (in the dual ECU systems).

I like your forum signature after a post like that.


In any case, any info that my tuner/builder comes across we'll be sure to share it.

[SomeoneWhoIsntMe]

https://www.kickstarter.com/projects...cking-platform

[AZFA20]

Originally Posted by SomeoneWhoIsntMe

@AZFA20 that's another point that I was going to make... just because a few people feel that keeping the stock ECU installed to keep the A/C and whatever else happy while running a different ECU to control the engine swap is less preferable for whatever reason, does not mean that it's somehow the "wrong" way, and that spending $9k on a motec setup is _THE_ definitive "right" way to do an engine swap in these cars.

Considering that you can get a swap running for the cost of materials to extend the new engine harness to fit the new ECU wherever you want it and splice it into the factory wiring, NINE THOUSAND DOLLARS is a little bit steep just because you think running one computer instead of two is "cleaner".

I agree, there is nothing wrong with running the two ECUs. The only pitfall is that you are required to have two different tuning softwares in order to make them both play nicely with each other. In my case for instance HPtuners and EcuTec. Some may consider this an issue but if you are like myself I already had both so it was no extra cost for me. As far as being clean you can make the dual ECU setup equally clean as a single setup. The only other thing that is a pro to the single standalone system is that traction control could be integrated easily but............................. who needs traction control? haha. In the end either route is good, just depends what you want to be able to do and how deep your pockets are.

[Drift&Drag]

Originally Posted by slicktop

It's died down the past few months but when I first told a few guys about the swap, all I got was negativity.

And boyyyyyy are they in for a nice surprise! lol

Originally Posted by AZFA20

The truth is you don't even need to get into the technicalities of dealing with the CAN system to make everything work on this platform. You guys are way over thinking it. The dual ECU systems are not actually interacting the way I think most of you are under the impression they are. It's simply a matter of intercepting signals from various sensors to make the ABS, Electric Steering, Gauges, and AC work as normal (in the dual ECU systems).

EXACTLY!

[s2d4]

Originally Posted by AZFA20

The truth is you don't even need to get into the technicalities of dealing with the CAN system. It's simply a matter of intercepting signals from various sensors to make the ABS, Electric Steering, Gauges, and AC work as normal (in the dual ECU systems).

What are you using/doing to intercept these signals?

btw, I think people are mistaking the intentions of my original post.

In my line of work, being a control systems engineer, having worked in both design and in the field, the dual ecu setup with original features/designs bridged out to service another priority is in my opinion a patch job/hack.
To do it properly would be starting with a design that'll encompass the requirements instead of hacking something in during operation, obviously with a higher upfront capital cost.

Now, this was just an opinion of a nobody on the internet.
People can agree to disagree, all I was saying was that I understood both side of the original discussion, no one was better than the other since it is pretty clear people have different ideas when it comes to:

How much it costs?
Pricing - Murica vs rest of the world.
Individual hourly rates, relative to self worth and market rate.

What are people willing to pay?
Zero for some, fair priced or astronomical for the low income earners.

How much people are willing to forego?
Tractional control, ABS, AC, Gauges, diagnostics and/or engine in, car runs so end of story.

How tight are their budgets?
5k, 10k, 20k, 25k, 30k..

Now, rather than throwing butt hurting egos around or holier than thou antics, just show people how it is done and they'll make their own assessments.
I am all for people doing a better job than what has already been shown, but even better is subjective at this point until we see some results.