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Old 02-17-2007, 02:33 AM   #151
I3izzy
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Great build, love to see people trying different things than just EJ25 builds, keep up the great work!
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Old 02-17-2007, 08:22 PM   #152
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Are you going to take this baby to the 1/4 track?
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Old 02-18-2007, 11:53 PM   #153
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check out atomic speedware for arp head studs
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Old 02-19-2007, 12:04 AM   #154
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I am new to this site how come I can't see the pictures of this simi closed deck block?
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Old 02-19-2007, 12:45 PM   #155
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Did you measure the stem length of the valves? It would be great if they are the same length as the valves in the EG33
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Old 02-19-2007, 06:30 PM   #156
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Will you take my money and do this to my car?
You can have my car and the 20k up front just don't give it back until it's done.
Better yet - is the H6 beast going to be for sale?
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Old 02-20-2007, 03:53 PM   #157
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Do you think it'd be possible to get 911 turbo-ish power levels and spool with this engine and a different turbo setup? Around 400/lb ft at 2000 rpms flat until 5000 ish would make a pretty sweet DD!
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Old 02-20-2007, 05:30 PM   #158
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I love this thing. subscribed
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Old 02-20-2007, 06:01 PM   #159
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Quote:
Originally Posted by roksax View Post
Do you think it'd be possible to get 911 turbo-ish power levels and spool with this engine and a different turbo setup? Around 400/lb ft at 2000 rpms flat until 5000 ish would make a pretty sweet DD!
I'm still f'n amazed at that torque spread... a mountain of torque basically from idle till arrested...
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Old 02-20-2007, 06:52 PM   #160
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Quote:
Originally Posted by xlsupreme View Post
I'm still f'n amazed at that torque spread... a mountain of torque basically from idle till arrested...
A large part of that is due to the variable geometry turbochargers, and it would be almost impossible to replicate with a conventional turbo, even if the engine itself is quite similar. However, it certainly seems feasible to mimic the performance of the 996 and earlier Porsches that didn't have this technology and didn't have quite as broad a torque band.
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Old 02-20-2007, 08:10 PM   #161
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Quote:
Originally Posted by themarxist View Post
A large part of that is due to the variable geometry turbochargers, and it would be almost impossible to replicate with a conventional turbo, even if the engine itself is quite similar. However, it certainly seems feasible to mimic the performance of the 996 and earlier Porsches that didn't have this technology and didn't have quite as broad a torque band.
Yeah, those variable geometry turbos seem to do it all. I'm no turbo guru, but maybe an appropriate twin-scroll turbo could achieve similar results?
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Old 02-20-2007, 08:20 PM   #162
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Wow amazing.
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Old 02-21-2007, 03:41 PM   #163
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twin scroll turbo equal to the H6 Combo with the GT40?

well, in all answers you're going to get to that question, the basic theory is the same in any reply.

You cant beat displacement when it comes to spool up time - More airflow through the engine compensates for the flow or push of air through the exhaust housing in the turbo - regardless of twin scroll or not.

Regardless of the turbine size at either end, regardless of how many pipes you run into the exhaust housing of your turbo, the H6 simply pushes more air than the STi 2.5L - Therefore, you have more ability to push a larger turbo - Same Concept as in a Rotary (except with a lower RPM threshold), and in such engines as the RB26, and the 2JZ.

Ways to counter this in a smaller displacement engine are through more aggressive cam profiles, ported heads, and/or Stroker kits... or engine packages that come with all of the above - Often these kits are more expensive than actually just going to an H6 in the first place.. haha.. (in Theory)...

from my experience:

With a VF37, I've just about maxxed it out at around 320WHP, with peak boost reaching early at around 2800-3200 rpm's... thats with a rough tune, an AVO Wastegate, and 94 octane. This is just slightly larger than the VF39, and much smaller than the turbo kit I'm going to install (when I return from Iraq this summer) with a combination of a GT32R twin scroll(exact details under wraps) and some heav mods to the engine. ... hopefully the development of the car is with the help of Jeff *hint hint* and the ever-knowledgable guys at PDX Tuning...

The endstate - The H6 & GT40 combo cant be beat in terms of spool up time and powerband - Its simply awesome to see this actually be built and used on the road -

Keep up the awesome work Jeff and I'll definately be subscribing to this thread!! WOOT!

Kory Noble
www.myspace.com/projectalphaproductions
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Old 03-06-2007, 12:18 AM   #164
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For those curious, I posted up some pics of my H6 assembly process. Both Jeff and I will be running at the Subiefest 2 here in Portland on April 7th btw.

http://forums.nasioc.com/forums/show....php?t=1215617

Cheers,

Jeff Sponaugle
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Old 03-06-2007, 12:29 AM   #165
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Looks so tedious, but very sweet!
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Old 03-06-2007, 07:07 PM   #166
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wow awesome ! Seems like alot of work though. I wonder how long it will be before more people are running the h6 instead of the boxer 4.....

do we see a future trend coming on ??
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Old 03-06-2007, 07:58 PM   #167
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Quote:
Originally Posted by IllNastyImpreza View Post
wow awesome ! Seems like alot of work though. I wonder how long it will be before more people are running the h6 instead of the boxer 4.....

do we see a future trend coming on ??
I hope so. I'd be pretty happy if a little off-the-shelf aftermarket support was available by the time I get around to it
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Old 03-09-2007, 01:50 AM   #168
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Quote:
Originally Posted by sponaugle View Post
For those curious, I posted up some pics of my H6 assembly process. Both Jeff and I will be running at the Subiefest 2 here in Portland on April 7th btw.

http://forums.nasioc.com/forums/show....php?t=1215617

Cheers,

Jeff Sponaugle
Whats your thoughts on gearing with an H6 powered subaru? Are you rowing thru the gears just to get up to speed with all that torque?
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Old 03-09-2007, 02:37 AM   #169
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Quote:
Originally Posted by DoctorNick View Post
Whats your thoughts on gearing with an H6 powered subaru? Are you rowing thru the gears just to get up to speed with all that torque?
that's a good question! I find my self doing that with this tranny that was designed for an EA82t (lo compression, 1.8l turbo...). and now with the ej22e behind it, I find myself shifting sooo often.
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Old 03-09-2007, 03:39 AM   #170
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wow i wish i had the money and time for a build like that. if there was a kit for this i would look into it in the future. i also wonder about the gearing with that kind of power. seems like i would be shifting every 2 seconds with something like that.
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Old 03-09-2007, 01:46 PM   #171
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Quote:
Originally Posted by Numbchux View Post
I hope so. I'd be pretty happy if a little off-the-shelf aftermarket support was available by the time I get around to it
Yes, the aftermarket is slowly catching up. Supertec now has pistons and valve train parts you can purchase, and Pauter can always make more rods. The work to notch and install the sleeves is quite expensive, but will certainly drop as more shops do it.

Quote:
Originally Posted by DoctorNick View Post
Whats your thoughts on gearing with an H6 powered subaru? Are you rowing thru the gears just to get up to speed with all that torque?
The short answer is yes. I am reving to about 6800 right now, and with the JDM tranny I am shifting all of the time. In fact I am in the process of doing a swap to the 07 gears just to get something a bit longer. With >300 lb-ft of torque from 3100 rpm to redline, the gears go pretty quick. Flooring the car at lower rpm results in wheel spin pretty quick, so a bit taller gearing would make things much better. I'll let you know how the 07 gears work out!



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Old 03-09-2007, 01:55 PM   #172
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^ are the o7 sti gears longer ?
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Old 03-09-2007, 02:14 PM   #173
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I think 5th and 6th are
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Old 03-09-2007, 02:37 PM   #174
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Quote:
Originally Posted by IllNastyImpreza View Post
^ are the o7 sti gears longer ?
This is old news but here goes -

STi 2006 vs 2007 gears:
1st 3.636---3.636
2nd 2.375---2.235
3rd 1.761---1.521
4th 1.346---1.137
5th 0.971---0.971
6th 0.756---0.756

Final Drive remains unchanged at 3.90

Source: http://www.media.subaru.com/
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Old 03-09-2007, 03:18 PM   #175
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yes they are longer. i can edge out 60 in 2nd right at redline and just shy of 90 in 3rd. its nice to not have to shift as much as the older models. with that much power i dont know how much that will help though. im sure that the 07 gears will not be enough and taller gears will be tossed in again.
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