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11-30-2022, 12:28 PM | #1 |
Scooby Newbie
Member#: 494009
Join Date: Nov 2018
Location: CA
Vehicle:2008 LGT |
Ej25 G35-900 E85
Event: Dyno pull
Location: Auburn, CA Ambient Temp: 66F Elevation: ~1200' Tires: PS4S 245/40/17 Car: 2008 Legacy GT Tuner: Travis Barnes Dyno Info: Mustang Transmission: stock 6spd Gear: 4th Peak HP at RPM: 605 @~6100 Peak Torque at RPM: 531 @ ~5900 Baseline hp/tq for a stock on same dyno: less than dynojet Target Boost: 30 Fuel: E85 Dotted line is 18psi on E85(475hp/424tq) Engine/Power Modifications: Darton sleeved EJ25(+2mm rod length engine) V25 heads(kelford 199b camshafts,+1mm ferrea valves,~8.7.1 compression) Garrett G35-900 1.01 A/R housing KillerB Holy Header ETS Rotated Turbo Kit 3.5" ETS front mount Turbosmart 44mm Hypergate EWG Turbosmart Raceport BOV ID 2000 injectors ID F750 Fuel filter Radium engineering dual Walbro 450s Aeromotive A1000 fpr Future Plans: Currently Working on another set of heads which will raise the compression of the engine. I will also be putting in larger camshafts(gsc 272's). I will likely move to an .83ar turbine housing. Believe it or not this is my daily driver. I will also be turning up the boost because why not. I hope this info is beneficial to you. There was not much public info regarding G35 turbos for Subarus when I decided to go that route. Feel free to comment or ask questions.
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Last edited by dlsteffen; 11-30-2022 at 12:35 PM. |
11-30-2022, 02:02 PM | #2 |
Scooby Specialist
Member#: 508105
Join Date: Nov 2019
Chapter/Region:
NWIC
Location: Greater Seattle Area
Vehicle:Link G4X flex tuned 02' EJ205 20G 6MT wagon |
Nice numbers! And on a sleeved non closed-deck engine?
Post a pic of your ride if you've got one, I love a good Legacy. Definitely seems the G35 with that big A/R really wants to be able to rev out past 6700 - those 199Bs are certainly some decent cams. Hope the new heads turn out well, I'm sure it will change the powerband a lot. Was this a flex tune or pure E85? Edit: I see you're going to step down to a .83 which I understand, though with some big cams and a big A/R that G35 would be real happy. |
11-30-2022, 02:40 PM | #3 |
Scooby Newbie
Member#: 494009
Join Date: Nov 2018
Location: CA
Vehicle:2008 LGT |
Thanks man. I'm my opinion there is no need for closed decking when you have a sleeved engine. Just make sure the engine builder knows what they're doing.
The dyno pull definitely is cut short I, would like to see what's going on at 7500rpm. Probably could play with boost controller and have it remain flat once it's retuned. This was a cobb flex fuel tune but once you experience e85 you never want to go back car made 424whp @14psi on 91 octane, I wasn't interested in pushing any more than that. Car is laggy which is why I'm considering that .83a/r housing but we'll see, it's definitely satisfying above 5k. Sent from my SM-G970U using Tapatalk Last edited by dlsteffen; 12-01-2022 at 10:34 AM. |
11-30-2022, 02:53 PM | #4 | ||
Scooby Specialist
Member#: 508105
Join Date: Nov 2019
Chapter/Region:
NWIC
Location: Greater Seattle Area
Vehicle:Link G4X flex tuned 02' EJ205 20G 6MT wagon |
Quote:
I don't necessarily agree with that regarding closed decking being overkill, I am not a huge fan of sleeving or pinning, but I do hope for a long life for your motor. I'd look into Cobb's upgraded EWG line kit or just upgrade the fittings and line DIY. The cleaner vacuum and boost signal and the bigger diameter fuel hose aid in tuning. Quote:
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12-01-2022, 01:18 AM | #5 |
Scooby Specialist
Member#: 179846
Join Date: May 2008
Chapter/Region:
NWIC
Location: Renton, WA
Vehicle:07 STi Limited EFR 8474 TS EWG |
nothing wrong with your heads, your just out of turbo. I would slap 1050 on it and keep same hotside
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12-01-2022, 06:44 AM | #6 | |
Scooby Specialist
Member#: 508105
Join Date: Nov 2019
Chapter/Region:
NWIC
Location: Greater Seattle Area
Vehicle:Link G4X flex tuned 02' EJ205 20G 6MT wagon |
Quote:
And a powerband that isn't close to 3000RPM wide really sucks to drive... This thing needs to rev out but I don't think it's out of turbo Last edited by K3rm1tth3fr0g; 12-01-2022 at 07:21 AM. |
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12-01-2022, 07:52 AM | #7 |
Scooby Specialist
Member#: 57064
Join Date: Mar 2004
Vehicle:2008 STi IAG built HTA86 E85 Kel272s Cos IM |
https://forums.nasioc.com/forums/showthread.php?p=46740326
Yup go down to .82 housing (that’s the house I’ve always stuck with across all turbos), rev it out to 8000, and may consider ETS max flow header.Also consider switching to Xona 7864S with their UHF turbine. I have 3500rpms of powerband with more than 800 whp the dual AVCS also helps with spool up |
12-01-2022, 08:11 AM | #8 |
Scooby Specialist
Member#: 508105
Join Date: Nov 2019
Chapter/Region:
NWIC
Location: Greater Seattle Area
Vehicle:Link G4X flex tuned 02' EJ205 20G 6MT wagon |
Also look into KBs big tube header. I want to see what it can do with a big g series.
They said around 600WHP is where is starts to help. Though it does slightly hurt spool. |
12-01-2022, 09:57 AM | #9 | |
Scooby Newbie
Member#: 494009
Join Date: Nov 2018
Location: CA
Vehicle:2008 LGT |
Quote:
I may be out of turbo but there is still power left on the table, at least another 10psi worth of boost. In an ideal world where I don't have to deal with legacy axles breaking I would probably have two different turbo setups, one for the street and one for the track. In that case I would have ran a g35-1050 and a g30-770. Cba switching turbos though, even if they are v-band connections. |
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12-01-2022, 10:18 AM | #10 | |
Scooby Newbie
Member#: 494009
Join Date: Nov 2018
Location: CA
Vehicle:2008 LGT |
Quote:
It may end up hurting more than anything because of turbulence. The secondary is 2.5" and the ETS uppipe is 2.375" O.D. Let me know if you know any company that makes 2.5" upipes with a v-band turbo connection. |
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12-01-2022, 10:55 AM | #11 |
NASIOC Vendor
Member#: 198281
Join Date: Dec 2008
Chapter/Region:
MAIC
Location: Virginia
Vehicle:2005 WRX/STi WRB of course |
Raising boost isn't going improve the bottom-end any appreciable amount. A smaller turbine housing will choke flow up top. I say you lose +30whp and you have increase power taper getting into the higher RPMs; it won't make power as far into the upper RPMs. Maybe lose 300-400 off the top. EJ25s always perform best when the turbo's are somewhat unbalanced; bigger turbine, smaller compressor. So if you want more power, you need to upsize the turbo. This route would also play well with improving flow characteristics of the heads. More response, I'd drop a size and go with the biggest A/R turbine.
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12-01-2022, 12:14 PM | #12 | |
Scooby Specialist
Member#: 179846
Join Date: May 2008
Chapter/Region:
NWIC
Location: Renton, WA
Vehicle:07 STi Limited EFR 8474 TS EWG |
Quote:
Before you dump more money get back pressure sensor in header and get turbo speed sensor this 2 things will tell you what you need to do and stop guessing |
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12-01-2022, 02:05 PM | #13 | |
Scooby Newbie
Member#: 494009
Join Date: Nov 2018
Location: CA
Vehicle:2008 LGT |
Quote:
My idea of raising the boost was to compensate for loss of peak HP by switching to the smaller turbine housing. sounds like I need 1.21 A/R housing |
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12-01-2022, 02:54 PM | #14 |
Scooby Specialist
Member#: 508105
Join Date: Nov 2019
Chapter/Region:
NWIC
Location: Greater Seattle Area
Vehicle:Link G4X flex tuned 02' EJ205 20G 6MT wagon |
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12-04-2022, 06:08 PM | #15 |
Scooby Guru
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Chapter/Region:
BAIC
Location: nomo splitting lanes LOL
Vehicle:2015 Wrx - fury kit silver duh |
I'm local to Snail Performance as well. I've heard from other guys who has tuned their cars well how conservative Travis can be as a tuner especially if M45 didn't build the car.
Nonetheless very healthy numbers, I think you have plenty of room life as well as mentioned. Turn that Bish up!! Any videos of the car in action? |
12-06-2022, 09:28 AM | #16 | |
Scooby Newbie
Member#: 494009
Join Date: Nov 2018
Location: CA
Vehicle:2008 LGT |
Quote:
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12-06-2022, 06:48 PM | #17 | |
Scooby Guru
Member#: 82745
Join Date: Mar 2005
Chapter/Region:
SCIC
Location: So Cal
Vehicle:2005 Subaru STI 2003 EJ207 S204 Wagon |
Quote:
It was a big problem before, hence closed decks was (still is?) the more desirable choice. |
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12-08-2022, 07:13 PM | #18 |
Scooby Specialist
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Join Date: Nov 2002
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Vehicle:2004 WRX wagon silver |
the best advice i can give you on bigger turbos is learn to drive in the upper portion of the rpm range, learn where the turbo really starts to make power and just learn to keep it there. most turbos only make power in a 3000-4000 range. so the best you can do is to know where that is and keep it around that range. driving a bigger turbo is different than driving a small turbo
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