The H6 Impreza Resource Thread

[RedMonkey999]

Originally Posted by Seraphinwolf

RedMonkey

That's better.

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[jdogma]

Originally Posted by phil.greiner11

Before I say yes your going to have to convince me that we def don't need a damper in it to take out vibrations. I heard of some weird/bad stuff happening to engines because they don't have one. Even the inline sixes which are just as well balance as the h6 need a dampener because of the forces on the crank shaft. This is all based on what I've heard/read so if anyone has any info id be very interested to hear it.


Sent from my iPhone using NASIOC

Beware of not running a harmonic damper. The EZ30R that I have does have a harmonic damper pulley. Read this: http://www.epi-eng.com/piston_engine...on_engines.htm
The flat 6 is perfectly balanced in all modes, but that does not affect the torsional twisting of the crankshaft, which is what the harmonic damper is for. The higher the torque, the more severe the crankshaft torsion, so if you supercharge or turbo the engine, it is even more of an issue.

[Seraphinwolf]

Thoughts on any treatments we might be able to apply to the crank? Cryo would leave it too brittle wouldn't it? How about Nitrating? Other options before going to the great beyond of forged?!(drooling... At the thought)

[Seraphinwolf]

So read through the whole thing and the physics is there but the worry is applied at a much different level than our motors. Aircraft run was different tolerance due to a great deal of changes from start to take off and cruising.
But also if I'm reading right it's actually giving us a good piece of mind. The frequency may increase with the six cylinder over the four but the wave length has dropped greatly! 375 times at peak and little over 100 times at the valley. The Six drops way down to about 250 times at peak and half of the four to about 50 times in the valley!
Being a more torque centered build we stay lower on the RPM range in most cases and much farther from risking touchy RPM frequency ranges. I also still feel the extra material and shear volume of metal extra those forces are being displaced over gives us a better shot. If the EG33 sand rails don't have an issue I'm sure the street and track bound six's can handle it. We will see though! I might just get some stuff and test the stock pulley verse the light one when it's done. Perks of access to shop, dyno, etc... Oh and owning a good standalone!

[vicious_fishes]

Originally Posted by Seraphinwolf

Thoughts on any treatments we might be able to apply to the crank? Cryo would leave it too brittle wouldn't it? How about Nitrating? Other options before going to the great beyond of forged?!(drooling... At the thought)

anodising?

[Seraphinwolf]

I'm gonna start rereadinf the Perrin blogs again... I wanna sort out were we think the max torque on the stock rods is...

[Seraphinwolf]

I swear Perrin's original running configuration gave way at 14psi from Rod failure... Hmmm... Maybe it's in the individual glob posts and not the long put together one... But looks promising still that they were 14-16psi on the GT35R "safely" and pushed up the redline to ~6k. Makes me think maybe the displacement if torque on six over four rods might mean the weaker rods might still hold well enough so long as oiling isn't interrupted.

JDogma where were you sitting at on your motor? Did you do any valve train? Mine is probably shot from sitting too exposed so I'm likely to just order the SuperTech stuff since it's actually really inexpensive.

[vicious_fishes]

supercharged ez36:

https://www.youtube.com/watch?v=N6c-...ature=youtu.be

[vicious_fishes]

Originally Posted by Seraphinwolf

I'm gonna start rereadinf the Perrin blogs again... I wanna sort out were we think the max torque on the stock rods is...

didn't the rods snap because of an oil starvation issue though?

phil's planning on boosting his until it breaks so far as i can tell. let him be the test dummy?

[H6STi80Y]

Hi all I'm new to this site and to Subarus and just won't to know if A subaru EG33 intake manifold will fit A EZ30 with out making big modification to make it fit

[Seraphinwolf]

No. The EG33 parts will not fit any of the EZ motors at all. They are COMPLETELY different.

[Seraphinwolf]

Originally Posted by vicious_fishes

didn't the rods snap because of an oil starvation issue though?

phil's planning on boosting his until it breaks so far as i can tell. let him be the test dummy?

Oh I can see that! Part of why I suggested smaller increments! So we can see where it gives out!

Yeah I though there was something about the rod giving way but the blog doesn't reflect it. I mean if you are presenting an article about what you and your shop can do you don't want to scare everyone off by saying that kind of stuff. It could have been Sponaugle's motor that did that. I'll have to go through "The Other Jeff"s stuff to see. Perrin's first was eating oil from missing the last piston ring. Not eaten or destroyed, not installed... It was forgotten...

Speaking of Sponaugle though. Someone you already know that he bought Perrin's old car like a year ago to drop the motor into an Factory5 818. I haven't check in on that since last year though... But it was the first the Perrin STi had resurfaced as for sale. Perrin sold it like 6 months or less after the rebuild and within a month it stopped starting and no one could figure out why. So it sat and sat. Finally it went up for sale and Sponaugle bought it, parted out the rest of the car or returned it to stock if I remember and started the new project.

[phil.greiner11]

Originally Posted by vicious_fishes

phil's planning on boosting his until it breaks so far as i can tell. let him be the test dummy?

Thats pretty much the plan. I mean I'm not trying to break the car but I want to see what it can do. I'm trying to get to 350 whp on the stock engine and probably leave it there for a while till I can build the engine and redo some of the exhaust and get a new turbo. Right now I have been running 10psi for the past week and a half I think. Granted I am not pushing it to the limits everytime I drive it, but I do use it as my daily and no problems so far. It is pretty quick too I love driving this thing. Definitely faster than my stock sti which is really what I was going for with the build for now. It was cheaper then building the ej25 for me so that's a plus.

I'm pretty sure Perrin blew up theres around 16psi. but it was making over 400whp before that reliably and then they turned up the boost on the stock rods and boom. I'm pretty sure that's what I read a while ago when I was researching the build.

I am also running a 7k rev limiter still for anyone who was wondering and that has also not given me any problems on the stock valve train. I plan on getting on a dyno at the end of the month to see if I can get the 350whp I want for the time being.

[phil.greiner11]

don't the ez30d engine not have the oiling issues the ez30r have because of no avcs/avls?

[Seraphinwolf]

Redline will change with the heads. Which might be a huge difference with the R.

The Perrin car was running 16psi on a 35R and was pulled apart cause of oil consumption which was the missing last piston ring.

[Seraphinwolf]

What I still want to see most are toque maps... Perrin conveniently left those out cause all they wanted to show was HP... I was hoping to see some torque vectoring on different setups... That is where it all gets laid on the line really

[vicious_fishes]

Originally Posted by Seraphinwolf

Oh I can see that! Part of why I suggested smaller increments! So we can see where it gives out!

Yeah I though there was something about the rod giving way but the blog doesn't reflect it. I mean if you are presenting an article about what you and your shop can do you don't want to scare everyone off by saying that kind of stuff. It could have been Sponaugle's motor that did that. I'll have to go through "The Other Jeff"s stuff to see. Perrin's first was eating oil from missing the last piston ring. Not eaten or destroyed, not installed... It was forgotten...

Speaking of Sponaugle though. Someone you already know that he bought Perrin's old car like a year ago to drop the motor into an Factory5 818. I haven't check in on that since last year though... But it was the first the Perrin STi had resurfaced as for sale. Perrin sold it like 6 months or less after the rebuild and within a month it stopped starting and no one could figure out why. So it sat and sat. Finally it went up for sale and Sponaugle bought it, parted out the rest of the car or returned it to stock if I remember and started the new project.

correct. iirc he had to put an EJ in to get it certified/registered/whatever before he could drop the h6 in an last i saw (looked a couple weeks ago) he hasn't put the h6 in yet.

Originally Posted by phil.greiner11

don't the ez30d engine not have the oiling issues the ez30r have because of no avcs/avls?

correct. it's why i got the D instead of the R.

[Seraphinwolf]

But where have we actually proof the R has oiling issues? Who's car or what builds, tests, etc.?

[Patrick Olsen]

Originally Posted by Seraphinwolf

What I still want to see most are toque maps... Perrin conveniently left those out cause all they wanted to show was HP... I was hoping to see some torque vectoring on different setups... That is where it all gets laid on the line really

If you have the HP graph, you have the torque curve - just have to pull off some points and put it into Excel (or whatever other graphing program) and have it do the math.

[Seraphinwolf]

True...

[H6STi80Y]

Originally Posted by Seraphinwolf

No. The EG33 parts will not fit any of the EZ motors at all. They are COMPLETELY different.

Thanks you

Is there a legacy GT STi model in a gen 3 wagon I ask this as I've seen like clear tailights on google on an outback VDO ?? lol

[H6STi80Y]

These are tha tailights on my H6 outback

[Patrick Olsen]

Originally Posted by H6STi80Y

Is there a legacy GT STi model in a gen 3 wagon I ask this as I've seen like clear tailights on google on an outback VDO ?? lol

Originally Posted by H6STi80Y

These are tha tailights on my H6 outback

Try asking in the Legacy or Outback forums.

[phil.greiner11]

Originally Posted by H6STi80Y

Thanks you

Is there a legacy GT STi model in a gen 3 wagon I ask this as I've seen like clear tailights on google on an outback VDO ?? lol

look up cardoc's build. I think he has your car and did a lot of exterior stuff to it as well as the supercharging the h6.

[vicious_fishes]

Originally Posted by Seraphinwolf

But where have we actually proof the R has oiling issues? Who's car or what builds, tests, etc.?

no actual proof. it's all speculation, but relatively informed. the avcs system is a huge drain on the oil pump and iirc, both the perrin and jdogma R's both failed because of suspected oil starvation. there's evidence to suggest but no actual proof. i want to beat mine on the racktrack and thus i got the most "reliable" of the two. a few of the legacy guys have talked about losing oil pressure on the track etc too iirc. it does make sense because of the drain on the pump the system has. as for how much of a drain that is...

phil's going to be the test dummy on the D however. if it dies at the same power level then i guess we'll have our answer