Excuse me sir, your Porsche's motor is in the wrong end: H6 Chat

2point5RS_Dan

2point5RS_Dan

HATER DAN
Every once and a while the topic of Subaru H6's are brought up. With newer the 3.0 and 3.6 around, and the SVX 3.3 cheaply available, the idea of cramming an h6 into Impreza's comes up.

Let's start with some info on different H6 motors, then we'll get into the Perrin build.

All of Subaru's six cylinder engines are a Flat-6 Four-stroke cycle design, Liquid Cooled.

ER

(Japanese: Subaru ER27) Subaru introduced its first six cylinder engine in its Subaru XT sports car. This SOHC engine was based on the EA82, with two cylinders added to the back.

  • ER27: 2672cc SOHC, 145 hp@5200 found in the 1987-1991 Subaru XT

EG

The (Japanese: Subaru EG33) engine was a direct replacement for the ER found in the Subaru XT sports car. Replacing it was the Subaru Alcyone SVX so Subaru needed a new engine. As with the ER27, Subaru took the EJ22 and stretched it two cylinders to make the new EG33. However, this four valve per cylinder engine was DOHC and valvetrain parts came from the not yet released EJ25D.


EZ

The (Japanese: Subaru EZ series) was introduced in 1996 in the Japanese Domestic Market, in the Subaru Outback, and in 2000 in the United States Domestic Market. It is a flat-six, 24valve, quad cam motor with one intake port per cylinder. It has aluminium blocks and heads. The number of exhaust ports per cylinder varies. It is available in EZ30D and EZ36D variants. The later EZ30D used from 2003-2009 was heavily updated from the early EZ30D used from 1996-2004. All use dual timing chains and coil-on-plug ignition.

  • EZ30D: 2999cc DOHC, 220ps (161 kW) @6000rpm, 289Nm@4400rpm. Bore 89.2mm, Stroke 80mm. Compression 10.7:1. This version uses one exhaust port per head, a cable throttle, variable intake geometry, cast aluminium intake manifold, and has a 6500rpm rev limit. It was only available with an automatic transmission. Found in the 2000-2002 Outback H6 and Legacy Lancaster 6.



  • EZ30R: 2999CC DOHC, 245ps (180 kW) @6600rpm, 297Nm@4200rpm. Bore 89.2mm, Stroke 80mm. Compression 10.7:1. This version had one exhaust port per cylinder, a drive-by-wire throttle, a black plastic intake manifold, VVL and AVCS. It was available in manual and automatic unlike the old EZ30D. Found in the 2003-2009 Legacy 3.0R, Outback 3.0R and 2006-2008 Tribeca.



  • EZ36D: 3629CC DOHC, 260ps (191 kW) @6000rpm, 335Nm@4400rpm. Bore 92mm, Stroke 91mm. Compression 10.5:1. Found in the 2010-current Legacy, Outback and 2008-current Tribeca. The EZ36D incorporates possibly the only implementation of an asymmetrical connecting rod in a modern application. The "pork chop" connecting rod was designed to allow additional displacement from the same bore and stroke. [6]
Click to expand...
As you can see above, Subarus first foray into H6 territory basically took their 4 cylinder designs and added two more cylinders onto them. The later ones word on the street is Porsche and Subaru worked together on...

Now trying not to bore you with information about how they're done and the problems often ran into, I'll save that for the resources section for you to look at on your own, and instead we'll jump to....

Perrin's Turbo H6 nutter-mobile:

Here's the link to the build page for you to read:

http://www.perrinperformance.com/pages/show/32

Images:

WKkip.jpg


MSGDk.jpg


LAfWI.jpg


More graphs found in the build page. Word is it was sold to some guy in Washington.

Videos:

Perrin introduces the car:

[video=youtube;YCu2MLqPcQ0]

Resources:

Nasioc H6 thread:

http://forums.nasioc.com/forums/showthread.php?t=1323800

RS25 H6 thread:

http://www.rs25.com/forums/f128/t84339-h6.html

 
a swapped GC beat me in the rallycross at Lyman this past winter. his pull out of the slower stuff was killing me and my turbo lag.

also Anders Green, director of NASA Rallysport East has a h6 swapped GC rally car and the thing is crazy fast.

 
I am a fan of the six.. in fact, it was a straight six that drove me insane, and then I learned math of resonace, torque dispersal...

the flat six is a winner. mathed correct..as correct as a flat four, or a 90 degree v8. the math is no hack job, it is a natural go...unlike inlines.

I also learned it runs as perfect as a 3 main boxer, if to have a benz crank. I forget about the 2.7 (old subaru) ... but that in reality should be a benz if it is a derivative of the ea82.. hence making that crazy looking engine the bigger classic in a mechanics truth.

I also found porsches made a lot more than most do not count, in SoCal there is a machine shop selling the older 2.7-3.4 air cooled for less than $4k...no turn in needed. it is to say the engine outran the chassis, owners going for liquids etc.

imagine the flows corrected up front on a sube?
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it is more than a "what if" to make it fit...

I also took note all flat six pursuers stay open to a hack job. be it a prosche in a vw van, hooked up to the old 4 speed,

or most recently a chevy corvair with a newer turbo subaru flat four hooked up to a porsche 911 5 speed...attempting bonneville. This project seems too slow to monitor, but I keep an eye out.

I would go for the 2.7 if to know a fuel system in the downdraft timing would work. the cams hold me up on real efforts. Subaru made a pussycat out of that engine, then left owners on their own.

Love that sound...

 
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