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Old 08-26-2013, 03:16 AM   #1
95ONE
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Default Ej207 V8 with VF43 340whp E85

I bought this wagon with the jdm V8 EJ207 and 6 speed conversion already in it. AVCS was not working and it had a USDM map loaded. It barely made 240whp. I figured out AVCS wasn't working on the dyno with Open Source reading cam angles. I figured out the program was loaded for a USDM WRX. I loaded a stock V8 ej207 file and suddenly made 270whp with working avcs. - Only after a ridiculous amount of time tracing down wires that seem to be ok. I was relieved.

I was content for a little while and decided to add a 3" maf that I made - I'm a fabricator at a local shop- and I went with a water to air with parts I bought off Ebay. Big difference.

I made 300whp with the new water to air and some maf scaling for the 3" on 93 octane here in Houston. I got some 900cc injecors, threw in some E85 that I can fill up with on my way to work. The results were pretty great. A lot of people buy larger turbos for this sort of power. I did mildly port the turbine housing. I think most of the gain is due to the low flow resistance of the Water to air cooler allowing more boost pressure to make it into the intake manifold. Before the water to air, It could only hold 16psi up top. Now its closer to 18. The tune isn't anything special. I did that, and I suck at it. you can see a clear rich spot that I still need to smooth out during spool up, and a spot of timing I need to add in between 4K-4500 rpms. There was no knock. ever.

I forgot to mention that the previous owner didn't leave the twin scroll on the motor, but installed a regular WRX manifold and up pipe to a VF43 turbo. he had plans on going to a bigger bolt on turbo, but never could get this set up to perform. I was glad to take up where he left off.

Final result was right under 340whp.

Event: Dyno at shop I work.
Location:Houston TX
Ambient Temp :95 F
Elevation: feet above sea level - 120
Weather: Hot as usual. Humid.

Car: 2002 Impreza WRZ wagon Bugeye
Tuner: I tuned it
Dyno Info: Dynojet 248 Four Wheel
Transmission: JDM 6 speed.
Gear: 4th
Peak HP at RPM: 339.04 @6375rpms STD corrected
Peak Torque at RPM: 321.51 @4750rpms
Baseline hp/tq for a stock on same dyno: no idea.
Target Boost:20
Target AFR: 11:5
Fuel: E-85
Engine/Power Modifications: Stock long block. Custom 3" intake/maf. Full 3" open exhaust with one small 3" Borla resonator. Water to air kit I made and installed. Lightly ported stock manifolds and turbine housing entry and exit. Ebay up pipe. Wrapped.
Driveline Modifications: ACT Clutch. JDM 6 speed
Suspension Modifications: Ebay Springs
Other Modifications: Clear markers and clear headlights. JDM hood. EBAY jdm grill. No name 17" rims.

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Last edited by 95ONE; 08-31-2013 at 04:53 AM.
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Old 08-26-2013, 03:40 AM   #2
hummelsubaru
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any dyno printout bro?
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Old 08-26-2013, 03:51 AM   #3
95ONE
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I was working on it as you were typing.

I just went to your build thread. Clearly its missing a tune. That turbo should spool no later than 4K rpm and keep climbing.

Last edited by 95ONE; 08-26-2013 at 04:06 AM.
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Old 08-26-2013, 01:30 PM   #4
Bugmanny
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Sounds sweet, wish I had a 207
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Old 08-26-2013, 03:05 PM   #5
Fierysun
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Love that flat power/torque band and early full spool. Gratz!
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Old 08-26-2013, 06:10 PM   #6
bebesito21
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Pics of car and a2w setup?
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Old 08-27-2013, 01:53 AM   #7
95ONE
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It's a boring looking car, but I can take pics of the A2W set up. I'll throw them up here tomorrow.
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Old 08-27-2013, 06:48 PM   #8
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ok. here are the pics. You'll have to keep in mind that I'm a fabricator and know how to half ass a build and still make it reliable. SO, it isn't suppose to be all pretty. I like it that way. I made the reservoir. I made the MAF pipe with an air straightener in there. I bought an ebay water to air core and exchanger. I cut/made/welded an adapter flange that allows me to use the stock blow off valve. I made a bracket that positions the bosche pump just below the reservoir. That's about it. 900cc injectors and a Walboro 255.
Also, my co-workers think they are comedians. I liked it enough to leave all the writing on for now.





Last edited by 95ONE; 08-27-2013 at 07:01 PM.
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Old 08-27-2013, 07:10 PM   #9
95ONE
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Quote:
Originally Posted by Fierysun View Post
Love that flat power/torque band and early full spool. Gratz!
Thx man.
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Old 08-31-2013, 04:48 AM   #10
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So... NO ONE is surprised by the Torque and Spooling characteristics? Peak numbers are all that's interesting eh?


ANYONE have a better power output anywhere on that graph with this turbo (VF43) and a 2.0 liter?

I offer this as a challenge. I'm hoping to get beat so that I can see where I can improve anywhere. Anyone? VF43 and a 2.0 Subie motor.
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Old 08-31-2013, 02:45 PM   #11
bebesito21
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Where is the reservoir for the intercooler?
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Old 08-31-2013, 03:16 PM   #12
95ONE
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Quote:
Originally Posted by bebesito21 View Post
Where is the reservoir for the intercooler?
Just to the right of it. Moroso Cap. Its not one to put ice in, - small - but one to function properly.
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Old 09-01-2013, 10:54 AM   #13
bebesito21
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Thought so....if you are looking for ways to make more power/be more efficient get a bigger reservoir and move it to the trunk
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Old 09-06-2013, 03:42 PM   #14
Illusive
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Quote:
Originally Posted by bebesito21 View Post
Thought so....if you are looking for ways to make more power/be more efficient get a bigger reservoir and move it to the trunk
Not true.

The reservoir is used for removal of airation and needs to be the high point on the system. A trunk mount would create a low spot for the reservoir and result in a loss in IC efficiency, as the core would not self bleed any air bubbles.

I think what you are referring to is adding an icebox to the system to achieve lower than ambient air temps.
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Old 09-06-2013, 03:54 PM   #15
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Im loving the idea with the H2O/O2 IC. props!!!
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Old 09-08-2013, 02:07 PM   #16
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Thanks. It allowed a very short charge pipe, and stockish mounting location. It also allowed more pressure through the core.

It's a bit more work than and Air to Air, but I think it was worth it.
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Old 09-08-2013, 02:10 PM   #17
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Nice powerband and spool! Making me wish I had thrown on injectors for my last tune so I could run E85 again...grrr
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Old 09-08-2013, 02:25 PM   #18
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Nice powerband and spool! Making me wish I had thrown on injectors for my last tune so I could run E85 again...grrr
Thanks. I just added a timing map that was smoothed out and turned up the boost 3 lbs. The 3 lbs extra pounds doesn't do much since the turbo just quickly dwindles down to 18psi as always. So maybe a little more torque, but no more horsepower. I would dyno it soon, but my weak link broke yesterday. The R160 rear diff. I have the JDM Motor and 6spd. The diff is stock. So. I'm looking for a stock replacement for now, just to get back on the road.
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Old 10-03-2013, 05:11 PM   #19
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Quote:
Originally Posted by Illusive View Post
Not true.


Quote:
Originally Posted by Illusive View Post
The reservoir is used for removal of airation and needs to be the high point on the system. A trunk mount would create a low spot for the reservoir and result in a loss in IC efficiency, as the core would not self bleed any air bubbles.
reservoir adds capacity to the cooling system - hence the suggestion to get a bigger one...just like a radiator, more capacity is more cooling.....moving it to the trunk separates it from the heat under the hood, which keeps the water cooler. mount it high in the trunk if you are concerned.

Quote:
Originally Posted by Illusive View Post
I think what you are referring to is adding an icebox to the system to achieve lower than ambient air temps.
not at all what i was referring to. thats a short term option, good for drag racing.
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Old 10-03-2013, 09:18 PM   #20
subiFKNpowers
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wow...nice ass subi bro
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Old 10-28-2013, 09:34 PM   #21
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"This **** is HOT!"
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Old 10-30-2013, 11:41 AM   #22
Illusive
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Quote:
Originally Posted by bebesito21 View Post
reservoir adds capacity to the cooling system - hence the suggestion to get a bigger one...just like a radiator, more capacity is more cooling.....moving it to the trunk separates it from the heat under the hood, which keeps the water cooler. mount it high in the trunk if you are concerned.
Partially true, but you still don't understand the point to the reservoir in a W2A system.

The system already has adequate capacity and does not need additional water/coolant for cooling, that is what the front mount heat exchanger is for. There is plenty of capacity in that alone to cool the system for extended load.

Not trying to repeat myself any more, but the point of the reservoir is to remove air bubbles from the system, increasing the efficiency of the heat exchanger and intercooler core. Any air in the system causes a massive loss in efficiency due to the smaller size of the core.

The reservoir's location in the engine bay is moot, it is routed after the outlet to the intercooler core, it is not intended to be used as a cooling chamber - that's the heat exchanger's job - (the radiator you mentioned)

If you wanted to further increase efficiency of the system, the only tangible way to do that is with an icebox system. A larger reservoir will have no impact on the systems cooling ability when the rest of the system is properly sized and designed.
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Old 10-31-2013, 11:36 AM   #23
LatentWagen
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Quote:
Originally Posted by 95ONE View Post
So... NO ONE is surprised by the Torque and Spooling characteristics? Peak numbers are all that's interesting eh?


ANYONE have a better power output anywhere on that graph with this turbo (VF43) and a 2.0 liter?

I offer this as a challenge. I'm hoping to get beat so that I can see where I can improve anywhere. Anyone? VF43 and a 2.0 Subie motor.
While the torque curve is nice, and you've got some serious power under the curve, it's not really surprising at all. People have been spooling VF turbos on 207's in the 3k-3.5k range for over a decade. My VF22 used to hit full boost around 3k thanks to properly wired AVCS, and that was in 2004
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Old 10-31-2013, 11:53 AM   #24
Shayhan27
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If you have a six speed at 3.90 you may want to consider sourcing an R160 out of a legacy with the 3.90 ratio which may keep you from breaking. I am running 350 hp through my setup like that with hard launches and have not had a problem yet.

Knocking on wood or formica or whatever my desk is right now.

Cool build. nice to see someone doing somthing different.
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