H6-EZ30 engine in the 818----IT FITS

[H6Legacy]

Hi guys. Just found my way here while googling for EZ30D conversions and turbo set ups. I'm currently running one of these motors retrofitted into an earlier Gen2 Legacy (called a Liberty here in Australia), with the factory H6 ecu and a dual range manual conversion. The most common trick to stop ECU codes popping up with a manual setup is to ground the neutral switch at the ECU, which is what has been done to my car. It's not ideal though as its struggles to idle smoothly and occasionally stalls when coming to a stop and pushing the clutch in, which is scary when the break vacuum and power steer suddenly disappears.

I recently found this thread on RS25.com where someone has wired up a transistor to trick the ECU into manual/auto when the clutch is pushed in to solve the problem I have with mine.
http://www.rs25.com/forums/f145/t155...z30d-swap.html

I'm very interested to see how you go with turboing this motor. I off-road my vehicle so would be looking at a high comp - low psi setup like Wayne is talking about, and was just looking at those same Garrett turbos.

For those that haven't driven a H6 with a manual they have the same torque and hp as a factory turbo and they go like it too, with no lag! In factory form the auto is an ugly power sucking parasite and doesn't do the motor justice.

A short video of how my H6 sounds tearing up a sand dune Down Under

[StatGSR]

Nice to see a guy that has actually completed an EZ+Manual swap on this site! i suspect when others see your post you might be getting inundated with with wiring questions! welcome aboard!

[Silvertop]

I love the sound! As predicted, its pretty much the same sound you get from a 6-cylinder Porsche. And that is very sweet indeed!!

[Wayne Presley]

Vroom Vroom

[riptide motorsport]

Sounds good!

[flynntuna]

Hey Wayne do you have a list of parts needed to make this conversion beside those supplied buy an impreza donor?

[Canadian818]

To my knowledge there's only a few things to fabricate. 2-1 coolant line, exhaust and intake. As for the wiring, either tackle the OEM, or buy a harness and standalone from Wayne.

[Mifune]

You may want to check if there is a change in weight distribution, front and rear.

[Wayne Presley]

To my knowledge there's only a few things to fabricate. 2-1 coolant line, exhaust and intake. As for the wiring, either tackle the OEM, or buy a harness and standalone from Wayne.

If you go NA you will have to make an inlet tube to the airbox/MAF sensor.

You may want to check if there is a change in weight distribution, front and rear.

Uh it's only 17 lbs, mounted in exactly the same location so the weight bias may change .9% My car with the turbo H6 is 59.7% rear and 50/50 in side and cross weights

[Flamshackle]

Uh it's only 17 lbs, mounted in exactly the same location so the weight bias may change .9% My car with the turbo H6 is 59.7% rear and 50/50 in side and cross weights

Thats awesome!

[Canadian818]

Does the EZ use the same engine mounts as the EJ? I doubt there's any stiffer aftermarket mounts for the EZ.

[Wayne Presley]

The frame mounts are the same, the ones on the engine are completely different.

[Canadian818]

The frame mounts are the same, the ones on the engine are completely different.

Thanks Wayne. After asking the question I did come across it mentioned a few times that STI (not sure how STI/non-STI could matter) mounts have been used on EZ's. Despite the EZ being a 3 bolt design and the EJ being a 2 bolt, it only requires slight modification...supposedly anyway, I've yet to find any proof. Might be easier to use the used mounts and install a dampner versus modifying aftermarket EJ mounts.

[flynntuna]

I'm exploring options. If I go with an EZ30, and kept it NA, I don't think I'd be satisfied with 250 flywheel HP. So what can one reasonably expect with the traditional power adders.


http://www.raptorsc.com.au/kits.php?id=70

[Canadian818]

Hard to say where it'll dyno with good headers and less drivetrain loss. Personally, I think 250rwhp NA trumps 300rwhp turbo any day of the week. They can really benifit from some valve train upgrades as well. Not sure if any of the headers pictured above would fit the 818 well.

[Wayne Presley]

The EZ30 should put out about 350 at 6 psi of boost based on pressure ratios. (20.7/14.7*250)

[Frank818]

Wayne, on stock static CR, right?
And stock CR cuz aftermarket parts to lower the compression on this engine are hard to find?

[tango68ss]

Vroom Vroom

Any new updates Wayne? Hows the fit-form-function, etc?? Headers? Just really interested in this set-up.

TC

[flynntuna]

Wayne, do you see any problems using a two to one coolant adapter with a fill cap, or would it be better without?

[Wayne Presley]

He put it in this one because the tube was higher than the top of the radiator. In the 818 you would just need to run a line to the degas tank from the 2 into 1.

[Sgt.Gator]

Wayne I live in Outback/Legacy Wagon/Tribeca country, there are tons of wrecked EZ36s here. For example a 2011 30K mile EZ 36 complete engine assembly is available from a local wrecker for $2500. Will your harness + ECU work on a EZ36? Any issues you can think of about using an EZ36?

[07FIREBLADE]

I know an iWire harness would work very soon.

[turbomacncheese]

Hey guys. Where are we at on the EZ30 setups? I have until January to make up my mind

[JB91710]

Hey Movieman! 021B.jpg

[Turboguy]

Hey Movieman! 021B.jpg

What.........the..........

[wleehendrick]

Hey Movieman! 021B.jpg

That's so crazy... I like it.

[JB91710]

Engine management??

You got that right!!!

[JB91710]

I know an iWire harness would work very soon.

Don't hold your breath though. I've been talking to them for over a year now and as recent as two days ago and they can not run an EZ30 at this time.

[turbomacncheese]

Do I understand correctly that the only reasons not to use an OEM harness on a NA EZ30 would be the weight and some trickery with the manual transmission? What happens with the transmission swap?

[JB91710]

Do I understand correctly that the only reasons not to use an OEM harness on a NA EZ30 would be the weight and some trickery with the manual transmission? What happens with the transmission swap?

It's a moot point anyway. I just found out the electronics to run my engines with Motec is going to cost a whole lot of money.

[JB91710]

I'm exploring options. If I go with an EZ30, and kept it NA, I don't think I'd be satisfied with 250 flywheel HP. So what can one reasonably expect with the traditional power adders.


http://www.raptorsc.com.au/kits.php?id=70

If one pair is good, why not two?

020B.jpg

[flynntuna]

Ha, the ez36 is going to need something a little different . I'm getting some inspiration from what the GTM guys do, my headers will be similar to what they do with the angle that the headers will have to make between the engine and frame. I have yet to decide whether to use a H pipe or an X pipe. I think that space will limit me to a H pipe even though the X pipe would look cooler.

Don't give up on your project to soon, theirs has to be a more cost effective solution out there.

[DSR-3]

I figured out what those corrugated tubes in the kit are for! They will probably outlast my oak header flanges.header-test1.jpg

[Samiam1017]

I figured out what those corrugated tubes in the kit are for! They will probably outlast my oak header flanges.header-test1.jpg

nice flange! do you know if the 30 and 36 would take the same flange or complete header? or are they different

[flynntuna]

I figured out what those corrugated tubes in the kit are for! They will probably outlast my oak header flanges.header-test1.jpg

Clever and effective. Will you be adding a H pipe?

[DSR-3]

nice flange! do you know if the 30 and 36 would take the same flange or complete header? or are they different

It looks like they use the same gasket (44011AG040) so maybe the flange is the same. As for the header, it depends on the engine location. Those pushing it back to clear the cam phasor hump(s) probably can't fit the header I'll build.

Also worth noting- re. "equal length" headers, 2 of the exhaust port in the head are "un-equal-length. Cylinders #1 and #6 are ~1" longer...

re. H or X pipe- I won't start with one, but there will be a place for one between the collector transition and muffler. I've only done a bit of research on it, but on a 6 it sounds like there's not a great performance increase from an H or X, but the effect on the sound may be a consideration.

[craigfree]

Also worth noting- re. "equal length" headers, 2 of the exhaust port in the head are "un-equal-length. Cylinders #1 and #6 are ~1" longer...

Oh damn it... are you sure on cylinder numbers? I thought the heads were not interchangeable side to side.

[DSR-3]

Oh damn it... are you sure on cylinder numbers? I thought the heads were not interchangeable side to side.

Location I'm sure of- but the numbering is from a sketch I made many months ago; #1 (front right) and #6 (rear left) are the long-ports. I don't see how the heads could be interchangeable.

[craigfree]

Then it's cylinder 2 and 5, but I still didn't model it in.

[Wayne Presley]

DSR has the numbering right, odd cyl are right, even are left