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Old 03-12-2006, 05:53 PM   #1
PDXTuning
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Default PDXTuning/Perrin H6 Info+Dyno!!

As many of you already know, we have been experimenting with the Subaru H6 motor applications in the Impreza platform. We put a ‘first stage’ H6 motor into Jeff Perrin’s 2006 STI just days before SEMA, which he successfully drove from Portland to Las Vegas and back. This car still serves as his daily driver. As of yet, we have not been able to get that car, or the other H6 platforms on the dyno. Since the installation of the Dynapak Dyno yesterday at our shop, we took quick opportunity to put Jeff’s car on the rack.

Before we delve into the results, I’ll provide some notes on the buildup, specifications, and future plans. This was by no means a tuning session, and the car still sits with a road tuned map that Jeff and Adam made over the last few months. Once some significant time is put into the map development, I suspect the pump gas lower boost numbers will improve significantly. The H6 motor in this car is a JDM 2003-2005 EZ30R motor, 3.0L displacement, AVCS variable valve intake cam timing, and two stage variable valve intake cam lift. This is the second generation EZ30 motor, which has the newer “3 port” exhaust head. It is used in a number of JDM H6 cars, the newer European H6 cars, and the 2004 and up US H6 cars.

We removed the heads from this motor, extracted the pistons, and installed a set of custom H6 low compression pistons we had built for us. These pistons run a 8.0:1 compression ratio, and come fully coated. They utilize the factory rings. This piston change was the only change to this particular motor. Rods, Heads, Cams, Gaskets, etc were all left stock. Jeff and Dustin built the exhaust manifold from stainless tubing, and adapted it to fit a standard T3 inlet flange and 4 bolt GT30/GT35 style outlet flange. For this particular setup, Jeff went with the GT35R turbocharger, identical to what I had on my 2.5L, and used by many here on Nasioc. This car also has a Aquamist water injection system is running the 2D setup with 6 injectors in the manifold runners. EM is the Hydra ECU built for us by Andrew. Jeff and I spent many hours getting the right info and oscilloscope plots for the cam and crank sensor interactions, and it starts and runs perfect. This Hydra also drivers the AVCS, Lift, and drive by wire.

Let’s take a look at the motor.





Here Jeff is taking off the front valve cover, which encloses the floating chain drive for the cam gears.



Once the front cover is removed, you can remove the chain assembly, remove the cam gears, and then the back cover.



Here you can see the chain mechanicals. Everything is floating in oil during operation.



With the chains removed, you can see the driver for the water pump and cam gears. Those cam gears are sharp!



As mentioned above, these new H6 motors have 3 exhaust ports, one per cylinder.



Intake ports are similar to the EJs, and look to have plenty of room for porting.



Here you can see how the intake cam has the two stage lift. The outer larger lobes are the low lift, and the inner lobe is the high lift, activated by pistons that come out of the valve buckets (controlled by oil pressure)



For the install into Jeff’s car, as mentioned above, we used 6 810cc modified blue injectors, some custom modifications of the stock fuel rails, a replacement coolant system (to fit the reduced front space), as well as a custom exhaust manifold, uppipe, and downpipe.

Here is an engine bay shot:



Let’s take a look at how it performs.
(next post)
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Last edited by PDXTuning; 03-12-2006 at 06:16 PM.
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Old 03-12-2006, 05:53 PM   #2
PDXTuning
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As mentioned above, these runs were done as a quick test of the dyno, and I suspect there is improvement to be had across the board with further tuning, especially at higher boost.

For the 92 octane pump map, the turbo was set at about 16.5PSI. Take a look at the results. NOTE: This is wheel HP and wheel Torque. The dynapak software says flywheel even if the TCF is set to 1.0, which it was. Note that these are not correct to crank HP numbers. This is HP and torque at the wheels. 2006 Stock STI was about 250-255whp about an hour earlier.



Here you see the car is making about 430whp, and 410lb-ft of torque, on only 16.5 PSI! Torque breaks 300 lb-ft at 3250 RPM! Remember this is with a 35R, which on the 2.5L is a laggy turbo.

Let’s take a look at the boost profile:



8PSI at 3000 RPM, hitting the target boost at 3500RPM! That is H6 3.0 for you!

Let’s take a look at a stock 2006 STI in comparison. (Note, this car was put on the dyno the same day, actually just a few mins before we did the H6).



Notice this car has more torque everywhere! This is a true loose nothing upgrade. You get better the stock torque EVERYWHERE, and loads to boot uptop. This is sweet. Mikey likes it!

What is next?

We have two more H6s going into cars in the next few weeks, and are doing some significant upgrades to make more power. The block is getting sleeved, we have replacement rods, and the heads will undergo some head development. The cams need some work to extent the upper end power, and the dual lift makes multiple durations possible. Both of these cars are 02 WRXs, using the same Hydra setup, but drive by throttle. We will be building several standard H6 exhaust headers for different turbo configurations. The H6 going in my car is going to use the GT40 Twin Scroll turbo with the real 1.34AR turbine hotside. We are also working on a turbo H6 for the Legacy, which would be one bad a$$ legacy.

Needless to say, we will have a lot more data and information available in the next few months. Exciting times ahead for the Impreza platform!

Cheers,

Jeff Sponaugle
PDXTuning.com

Last edited by PDXTuning; 03-27-2006 at 02:51 PM.
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Old 03-12-2006, 06:02 PM   #3
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wow great write up. subscribed. very informative post as always from the guys at pdx. cant wait to see when you guys crank up the boost!
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Old 03-12-2006, 06:06 PM   #4
InfamousDX
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PDXTuning's write-ups > * .

Seriously. Good ****.. congrats on the successful swap and turbo!!
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Old 03-12-2006, 06:11 PM   #5
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But no shots of the car...

Very nice write up, Looking forward to hearing more.
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Old 03-12-2006, 06:13 PM   #6
PDXTuning
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Quote:
Originally Posted by DoctorNick
But no shots of the car...

Very nice write up, Looking forward to hearing more.
Here you go! These show the water injection system, which is VERY cool.













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Old 03-12-2006, 06:17 PM   #7
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Looks like crap. ( ).
thanks.

Almost OEM looking...
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Old 03-12-2006, 06:18 PM   #8
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would it be possible to reverse the intake mani like the 2.5? could loose a lot of piping
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Old 03-12-2006, 06:19 PM   #9
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What is the weight difference with a larger engine in there? How does it affect handling with more weight in front? How soon before I can get one in my car?
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Old 03-12-2006, 06:37 PM   #10
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looks great! definitely one of the more interesting engine builds, great job!
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Old 03-12-2006, 06:47 PM   #11
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The thing I find most interesting is that it is a chain drive on the cams and not belts Otherwise it makes me want to swap a Big Block Subaru engine in so to speak
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Old 03-12-2006, 06:51 PM   #12
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Very nice!!! You guys never cease to amaze me. Why do I have to live so far away?!?!?!?

Keep up the good work as always!!!

-Matt
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Old 03-12-2006, 07:06 PM   #13
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well done pdx/perrin crew.... keep up the good work and continue with fantastic documentation.
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Old 03-12-2006, 07:08 PM   #14
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Quote:
Originally Posted by wrxtremeWGN
would it be possible to reverse the intake mani like the 2.5? could loose a lot of piping
It is possible, but not easy. You can't tell from the pics, but the H6 intake manifold is pretty tall. It would take some modification work to get it to flip around and not hit the hood.

Quote:
Originally Posted by rpdwrx
What is the weight difference with a larger engine in there? How does it affect handling with more weight in front? How soon before I can get one in my car?
I havn't had a chance to weigh the motor, but I'll give it a shot and see what I can come up with. I would suspect the motor is perhaps 100 lbs more? While having more weight should result in some push, it didn't seem obvious in this car. I suspect a stock suspension car might be more problematic though.

As for getting one in your car, we are talking to customers now who want to get this setup. At least for the time being, we are only doing this if the car is delivered to our shop, as there is a lot of custom work involved. Anyone interested should give us a ring!

Quote:
Originally Posted by 2002WRXSTi
The thing I find most interesting is that it is a chain drive on the cams and not belts Otherwise it makes me want to swap a Big Block Subaru engine in so to speak
Yes, those chains are pretty wicked. It certainlty takes more time to get this motor bolted back together then the usual EJ! I am curious to see how something like launch control will effect the life of the chains.

Quote:
Originally Posted by ShaggyGT
Very nice!!! You guys never cease to amaze me. Why do I have to live so far away?!?!?!?
Keep up the good work as always!!!
-Matt
Thanks Shaggy! Just image this is the Legacy. Now that would be a real sleeper.
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Old 03-12-2006, 07:14 PM   #15
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Quote:
Originally Posted by sponaugle

Thanks Shaggy! Just image this is the Legacy. Now that would be a real sleeper.
Yeah I know. Ever since I first heard of you guys putting the H6 into Jeff Perrin's car I have been comtemplating doing the same swap in future. I am just glad you guys are working on it now so when I get ready there will be parts (exhaust manifold, downpipe, ect.) availible. I would really like to have the H6 now though!!!

-Matt
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Old 03-12-2006, 07:18 PM   #16
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Quote:
Originally Posted by PDXTuning
Exciting times ahead for the Impreza platform!

Cheers,

Jeff Sponaugle
PDXTuning.com
This is very interesting. I agree, great times ahead for the impreza/suby platforms. Good job guys.
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Old 03-12-2006, 07:40 PM   #17
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how about stroking? make it a 3.3L or a 3.5L?
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Old 03-12-2006, 07:41 PM   #18
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OMFG!!! This car is amazing!! Thanks for the superb wirte up. I always wanted more info on this car.

:subscribed:

Thanks,
Omar Khan
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Old 03-12-2006, 07:55 PM   #19
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I think as a true enthusist shop, you do owe us one more thing...


A sound clip
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Old 03-12-2006, 07:57 PM   #20
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very very exciting project u guys have there. pm sent
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Old 03-12-2006, 07:58 PM   #21
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WOOOOOO VERY INSANE GREAT JOB JEFF
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Old 03-12-2006, 08:04 PM   #22
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Very, very nice. Waiting on the videos...................
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Old 03-12-2006, 08:05 PM   #23
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awsome write up, look foward to some dyno and track numbers onced tuned.
do you have any pictures of the exhuast manifold? would like to see how the pipes are ran.
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Old 03-12-2006, 08:07 PM   #24
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Videos would be great as would some c16 numbers but Im sure they'll come in due time.
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Old 03-12-2006, 08:10 PM   #25
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Quote:
Originally Posted by DoctorNick
I think as a true enthusist shop, you do owe us one more thing...


A sound clip
I agree!

I have been very anxious to hear this car.
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