EZ30R Swap

[Captain Insano]

This would be an interesting swap to me. In fact, since this car was rumored and after release I have been wondering if an NA flat six would be available in this car from the factory at some point. All the "We will not do FI..." talk from subaru and toyota just make me dream about other NA power options.

[1stGenBRZ86]

lol this idea randomly came to me today before I even saw this thread. I say do it! Be an innovator for this platform.

[Kodename47]

What I'm currently trying to find out is how are easy a swap to an EJ would be..... Seems the hardware for an EJ to EZ is relatively simple.

[wparsons]

Doesn't matter how easy it is to physically mount the engine to the body, the transmission still won't bolt up, and you'll have to re-plumb and re-wire the whole engine bay. (direct + port injection on 4 cylinders vs just port injection on 6 cylinders).

I also doubt any available headers will work with this platform either, so you're looking at a one off custom header to make the swap fit.

Doesn't matter if the engine itself is only $1000, it's going to cost more than FI to get the engine in the car and running.

[arghx7]

Originally Posted by wparsons

Doesn't matter if the engine itself is only $1000, it's going to cost more than FI to get the engine in the car and running.

ding ding ding

[Acree]

Originally Posted by Kodename47

I love how people on this forum are quick to put the boot in. I would assume you couldn't but I had read somewhere that you could retune the ECU for 6 cylinders via ECUtek. After all, ECUtek do cover the ECU for the EZ30 engine. Is it that crazy? If you could re-write the full code to take the extra cylinders into account? I guess standalone is most likely the way forward, but if this avenue is possible then it would save a huge amount of work. Just FYI, it wouldn't be the 1st engine swap I've done

Does anyone know how CANBUS systems interface, are there multiple ECUs on the twins or are they all built into 1? Is it possible to swap Subaru ECU's without any issue?

It might not be the first engine swap you've done, but I'm willing to bet money it's the first swap you've done requiring an advanced engine management system and that you've never tuned a car before.

I'm an electrical engineer. I've tuned my evo and I've built standalone fuel injector driver control circuits before. So trust me when I say this, there is no way in the next 10 years, that you will ever get an FA20 ecu to control an H6 motor.

It wouldn't just require reprogramming. You would have to modify the board and it's components extensively, and that's only after reverse engineering the entire board.

[himbo]

Actually this sounds like a really cool project. I think a standalone ecu is the only way you'll get it to work. And once you work out the tuning bugs, it's a super reliable motor. Maybe you should put some high compression pistons and redo the head to see if you can eke out 300hp from an NA H6... That would be a killer setup...

I say go balls to the wall on this

[JP]

It's not impossible: [ame="http://www.youtube.com/watch?v=svNz0HesGs8"]８６ã�«æ°´å¹³å¯¾å�‘ï¼–æ°—ç*’エンジンを載ã� ›ã�¦ã�¿ã�Ÿã€‚ - YouTube[/ame]

Easiest thing for the box is to put a RWD spool into an EJ or EZ 6 speed and use that.

I'd personally put a Vipec V88 on it for ease of engine control, but with enough work you can make it run on a stock EZ ECU like the one in the link above.

[Kodename47]

Andrew, I hear what you're saying..... but so far you've offered no constructive help. So the stock ECU is a no-go. I figured it probably was anyway.
@JP, that's what I was looking for, who is it that's done the conversion? I've read on NASIOC about an Impreza managing to use the stock EZ ECU on an OBD2 car. I'm hoping that integration may not be to hard into the FT platform.

With the FA20 about to make it's way into some other Subaru models, it should be easy to ascertain how easy gearbox compatibility is, or what may be required.

[ft_sjo]

The ECU will be the last of your worries chap.

[JP]

There's a few more pics of the setup above in this thread:
http://www.ft86club.com/forums/showthread.php?t=33486

You can get some info on the 3x data busses used by the 86 ECU from techinfo.toyota.com and there's plenty of info out there around the stock H6 ECU. IMO the electrical side of things is the most difficult part of a H6 swap into the 86, all the custom fabrication required to make it work mechanically is relatively easy.

There's nothing hard about making new headers, tailshaft, cooling system, shift linkage etc etc.

[OrbitalEllipses]

Pretty sure @ichitaka05 knows about an H6 swap out of Japan...but I don't see it being cheaper than boost after all the custom fab work.

[Superhatch]

Swapping an engine not designed for a chassis into said chassis does not equal OEM reliability, regardless of what you might think.

I've got lots, and lots of swaps under my belt and at least 50% of the ones I did that were first time swaps (a lot of back in the day Honda swaps) had some sort of issues. Wiring troubles that took time to figure out. Used engines that went bad shortly after a swap, engine management that didn't work quite right (again..the days before plug and play Honda swaps, write-ups on forums, etc).

Diving into a one of a kind swap is likely going to end up costing you double what you think it might. It's a huge endeavor and will require extensive planning, knowledge, and money regardless of how cheap the motor is.

I'm not saying it's not going to work, or that you can't do it. I'm just saying prepare for things to not work, and spending a lot of time and money to make it right, especially if your intention is to have an OEM quality build.

Best of luck.

[ichitaka05]

Originally Posted by OrbitalEllipses

Pretty sure @ichitaka05 knows about an H6 swap out of Japan...but I don't see it being cheaper than boost after all the custom fab work.

Yes, I know a guy that's close friend w that 86 owner. He said it's not cheap & it's heavy, so weight ratio get screwed up. In Hot Version, Tsuchiya-san said, it needed a lot of suspension or to make that 86 good... but Orido-san really enjoyed the tq on that car.