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Old 04-21-2016, 08:43 AM   #26
xluben
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Anyone found the limit of the H-Tuff yet?
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Old 04-21-2016, 09:01 AM   #27
igotboostpower
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sent you a pm pet3r
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Old 04-21-2016, 09:50 AM   #28
pet3r
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Quote:
Originally Posted by user1029 View Post
Add money to your IRA

Ha, maxed out that option before taxes
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Old 04-21-2016, 09:52 AM   #29
pet3r
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Quote:
Originally Posted by xluben View Post
Anyone found the limit of the H-Tuff yet?

Ya that's the only thing I'm considering now is whether I should just go ibeams. Or upgraded valve springs, but smaller turbos gain no advantage revving out past 6k rpm anyway.
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Old 04-28-2016, 11:43 AM   #30
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Anyone think its worth upgrading valve springs? I keep thinking about it, which means in the end i'll likely end up doing it, ha.

But, if I'm running a "small" turbo, its not going to rev super high anyway. I think it will hold power to redline, but I'm not looking to rev super high anyway.

Are springs more of a safety precaution though?
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Old 04-28-2016, 12:36 PM   #31
user1029
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If you aren't touching the heads then I would not do anything to them
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Old 04-28-2016, 08:37 PM   #32
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Quote:
Originally Posted by pet3r View Post
Anyone think its worth upgrading valve springs? I keep thinking about it, which means in the end i'll likely end up doing it, ha.

But, if I'm running a "small" turbo, its not going to rev super high anyway. I think it will hold power to redline, but I'm not looking to rev super high anyway.

Are springs more of a safety precaution though?
Are you planning on spinning it higher? Larger lift cams? You only really "need" springs if you're upping the rev range and or going for a higher lift cam. Aside from that they are more of a safety measure to just get the old, possibly stress weakened stock springs out of there. But that's personal preference really.

Quote:
Originally Posted by pet3r View Post
but smaller turbos gain no advantage revving out past 6k rpm anyway.
That's not necessarily true, If the setup has been built for the smaller turbo you can spin them quite high. There's a local 06 STI build that's running a gtx2867r in a stock location that holds a flat torque curve all the way to 7k and the turbo is not the limiting factor rpm wise. My V7 ej207 and it's stock VF30 runs all the way out to 7k, lets not forget all the Hondas running a gtx3071r spinning to 9500rpm with flat torque curves. If you're choking the turbo at 6k rpm something is wrong. Either the housing is too small, you're post turbo exhaust is too restrictive either size wise or the bends are too sharp after the turbo, intake is too restrictive, etc....or it could be the tuner is afraid of rpm, which sadly is the case most of the time in the Subaru world. There's only 1 local builder/tuner to me that I've ever seen build setups and tune them with flat torque curves on Subarus, one is a rotated 30r setup and the other is that gtx2867r in a stock location. If built and tuned right the size of the turbo should only limit your power potential, not your rpm....to a point.

Last edited by Nick411; 04-28-2016 at 09:14 PM.
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Old 04-30-2016, 12:47 AM   #33
pet3r
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Quote:
Originally Posted by Nick411 View Post
Are you planning on spinning it higher? Larger lift cams? You only really "need" springs if you're upping the rev range and or going for a higher lift cam. Aside from that they are more of a safety measure to just get the old, possibly stress weakened stock springs out of there. But that's personal preference really.

That's not necessarily true, If the setup has been built for the smaller turbo you can spin them quite high. There's a local 06 STI build that's running a gtx2867r in a stock location that holds a flat torque curve all the way to 7k and the turbo is not the limiting factor rpm wise. My V7 ej207 and it's stock VF30 runs all the way out to 7k, lets not forget all the Hondas running a gtx3071r spinning to 9500rpm with flat torque curves. If you're choking the turbo at 6k rpm something is wrong. Either the housing is too small, you're post turbo exhaust is too restrictive either size wise or the bends are too sharp after the turbo, intake is too restrictive, etc....or it could be the tuner is afraid of rpm, which sadly is the case most of the time in the Subaru world. There's only 1 local builder/tuner to me that I've ever seen build setups and tune them with flat torque curves on Subarus, one is a rotated 30r setup and the other is that gtx2867r in a stock location. If built and tuned right the size of the turbo should only limit your power potential, not your rpm....to a point.
Don't plan on upgrading cams, keeping those stock.

What I mean by "no advantage revving out past 6k rpm anyway" is that this turbo is documented to start dropping power after 6krpm, both HP and torque, above 500whp. Thats the target power goals. If it was 400whp on 93, then it would probably hold fine, but it doesn't sustain in the higher rev range.
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Old 04-30-2016, 12:48 AM   #34
Joshwrx04
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Default pet3r's EFR7163 EWG, IAG closed deck, TMIC build

My heads were machined for 1/2 in studs along with my case, I ended up using 625's on the new case with the 1/2 machined heads.

Last edited by Joshwrx04; 06-07-2016 at 06:22 PM.
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Old 05-04-2016, 07:32 PM   #35
Papa Panda
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Another pet3r build?! Yes please! I loved your hatch and definitely look forward to this! Gave me some ideas to do to mine! Glad you're back!
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Old 05-07-2016, 04:12 PM   #36
pet3r
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All the parts except the block and exhaust are in. Need to take some pics of it all

Surprised at how small the EFR turbo really looks. I swear the gtx3076 housing was much larger.

Excited for the full vband setup!
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Old 05-08-2016, 03:36 AM   #37
pet3r
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Got a few pics taken tonight. See the fully gallery on my blog.










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Old 06-06-2016, 01:40 PM   #38
wgr73
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Heck ya. Will follow this closely. Loved your last car! Ron really did a great job tuning it as well
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Old 06-06-2016, 01:48 PM   #39
STiSomeday
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Nice parts and nice shots, this car is going to be fun to drive!
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Old 06-06-2016, 05:58 PM   #40
Hyper
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sub'ed

I got a TS 7163 laying in the garage waiting for the new motor, will also be using TMIC (ETS)
is that a T3 turbo blanket you used?
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Old 11-20-2016, 01:28 AM   #41
pet3r
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Here are some numbers.

In all honesty, there was a lot of hype for this turbo. I can't say it lived up to it. Sure it has some decent response, but nothing that was so startling to me. Based on reports and dyno plots, others were raving about how responsive this turbo is. I'm not convinced, but its still fun! It definitely pulls hard all the way to redline.



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Old 11-20-2016, 07:52 AM   #42
ALOKIN
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I looked at all the dyno plots when it came out and got flamed for saying it looks like a 2.5xtr but with way more hastle (they were having spring issues and were being finicky).
Looks like a good driver setup.
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Old 11-20-2016, 10:56 AM   #43
Paul
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So comparing this graph with your gtx3076, the EFR spools slower and makes less power everywhere? Is there something I'm missing that contributes to that??
Do you have a graph with both turbos on it?

How's boost recovery on shifts between the 2?
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Old 11-20-2016, 02:38 PM   #44
user1029
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JJ has always been unimpressed.jpg with EFR turbos
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Old 11-20-2016, 03:04 PM   #45
ALOKIN
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Quote:
Originally Posted by user1029 View Post
JJ has always been unimpressed.jpg with EFR turbos
He thinks their not:

Last edited by ALOKIN; 11-20-2016 at 03:42 PM.
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Old 11-20-2016, 03:51 PM   #46
Cefaln452
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I'm making 100 more hp than you on a gtx3076r at 27psi. I'm glad I didnt go with the efr as I was thinking about the one you have.
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Old 11-20-2016, 06:53 PM   #47
pet3r
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Quote:
Originally Posted by Paul View Post
So comparing this graph with your gtx3076, the EFR spools slower and makes less power everywhere? Is there something I'm missing that contributes to that??
Do you have a graph with both turbos on it?

How's boost recovery on shifts between the 2?
It's hard to compare boost recovery, because I haven't driven my gtx3076 in over a year (sold it). I do feel that the EFR is a bit better, as I can hit the gas at 3500 and it comes on pretty quick. Between shifts I would say is slightly better too.

Here is my previous build, compared to the current EFR. Blue line is the EFR, green is the gtx3076. Builds are somewhat comparable, but biggest differences: Spearco TMIC on the 08, no valve springs on the 08, not the same engine build specs on the 08, and I was running MAF tune on the 08, and stock fuel system on 08. Both had stock catback though.



I went with the EFR this time around based on previous reviews. I didn't need 550whp if I would gain about 500rpm of better early response. Since I got neither, it was a bit disappointing.
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Old 11-20-2016, 08:18 PM   #48
user1029
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Quote:
Originally Posted by ALOKIN View Post
He thinks their not:
"not white"
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Old 11-21-2016, 12:07 PM   #49
ALOKIN
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Quote:
Originally Posted by user1029 View Post
"not white"


Ah its good to be back
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Old 11-27-2016, 03:40 PM   #50
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I went a little smaller with the 7064. It was my first BW Turbo, but I really liked how everything came together. It made 410whp at 19lbs on 92. I just installed flex fuel parts and now need to get tuned for that to see how it does on E85. Looking forward to it for sure.
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