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Old 10-12-2019, 01:44 PM   #2926
1qukSti07
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Member#: 326585
Join Date: Jul 2012
Chapter/Region: South East
Location: Florida
Vehicle:
2007 STi
WRB

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Quote:
Originally Posted by '05CrystalGray View Post
2005 STi, stock motor, Full Race EFR 7163 kit.

Does anyone have issues with the car going to wastegate boost when shifting really fast? If I shift normal/fast the car hits target boost each shift. But when I race or do flatfoot shifting, the car will hit target, shift happens and then sits at wastegate boost until I feather the throttle.

Could this be because I need the stiffer BOV spring?

As a side note, will a stiffer spring require a retune? Anybody switched between the two? I've heard it helps with spool and response.

I switched to the stiffer BOV spring at the suggestion of Full Race. There was no noticeable difference beside the reduction of the whistle/surge noise in vaccume (10inHg). That spring change will not require a retune, but a wastegate spring change will require a retune.
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Old 10-15-2019, 09:25 PM   #2927
Gipp8
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Member#: 507432
Join Date: Oct 2019
Default Bolt ons

What other bolt ons do you need to reach that 500wtq at the lower rpm range?
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Old 11-11-2019, 12:59 AM   #2928
RckyMtnGT
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Member#: 440549
Join Date: Feb 2016
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
2007 LGT EFR6758 6mt

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https://www.turbosmart.com/news/gen-...port-released/

Interesting stuff from Turbosmart. EFR focused actuator. Flexible rod and better sealing, sounds like? The position sensor is interesting, but not something I would be able or need to make use of.

Speaks about it here for a bit, along with the electronic wastegate stuff, which is pretty neat sounding -

I suppose as I'm still on a single port actuator, seems like a good opportunity to pick one up in Jan' 2020 release and go for a retune. Currently on a 14psi spring, and peak at 24psi, and tapers quickly. "Ran out of wastegate", per my tuner, definitely leaving power on the table.

@YamahaSHO, what spring pressure are you running on your twin port setup? Are you using the MAC 4port solenoid to control it? Did you settle on a preload setting?
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Old 11-25-2019, 08:25 PM   #2929
PrinceVegeta
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Join Date: Aug 2015
Vehicle:
2008 JDM WRX

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I would like to ask if it's possible to fit the T4 Twin Scroll 7163 in stock location?

Has anyone done it successfully?
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Old 11-25-2019, 10:32 PM   #2930
mazdan
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Join Date: Jun 2012
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Quote:
Originally Posted by PrinceVegeta View Post
I would like to ask if it's possible to fit the T4 Twin Scroll 7163 in stock location?

Has anyone done it successfully?
Yes it fits.
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Old 11-25-2019, 10:52 PM   #2931
kellygnsd
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Member#: 32669
Join Date: Feb 2003
Chapter/Region: SCIC
Location: Woodland Hills
Vehicle:
2007 2.34LR, EFR7670
LINK G4+ hybrid STi

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Quote:
Originally Posted by mazdan View Post
Yes it fits.
I don't know of anyone doing stock location twin scroll kits? KB only had single scroll kits right?
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Old 11-26-2019, 12:32 PM   #2932
mazdan
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Quote:
Originally Posted by kellygnsd View Post
I don't know of anyone doing stock location twin scroll kits? KB only had single scroll kits right?
Right, you have to make your own. If you start with an own twin scroll header then you only need to make an up-pipe.
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Old 11-26-2019, 01:07 PM   #2933
PrinceVegeta
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2008 JDM WRX

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Who can make a T4 Twin Scroll Up Pipe that fits with the JDM OEM TS Equal Length Headers in Stock Location for me ?
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Old 11-26-2019, 04:25 PM   #2934
kellygnsd
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Location: Woodland Hills
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2007 2.34LR, EFR7670
LINK G4+ hybrid STi

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Quote:
Originally Posted by mazdan View Post
Right, you have to make your own. If you start with an own twin scroll header then you only need to make an up-pipe.
I'm not sure about the smaller frame turbos but I run the Full-Race rotated 7670 kit and to me, it doesn't look like it would be possible to keep twin scroll with the T4 hotside in stock location.
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Old 11-26-2019, 10:19 PM   #2935
Homemade WRX
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Location: Mooresville, NC
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96 in the garage
search FIRST, then PM!!!

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Dig into the Borg Warner size sheets and see how much longer the housing is for the T4. It could be do-able.
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Old 11-26-2019, 11:19 PM   #2936
mazdan
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Quote:
Originally Posted by kellygnsd View Post
I'm not sure about the smaller frame turbos but I run the Full-Race rotated 7670 kit and to me, it doesn't look like it would be possible to keep twin scroll with the T4 hotside in stock location.
I'm sure you're right, the B2 frames are too big.

The B1 twin scroll frame turbos will definitely fit though. I've been running one for years. I've never posted results because I still haven't tuned it...

I have a couple of pics on instagram: solomotive
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Old 11-26-2019, 11:20 PM   #2937
yamahaSHO
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Member#: 73932
Join Date: Nov 2004
Chapter/Region: RMIC
Location: Denver
Vehicle:
2005 STi EFR 6758
04 S2000 EFR 7064

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I was running 12-13 PSI spring setup in my 2-port TurboSmart actuator, using the BW supplied 3-port EBCS.



I actually sold my car a couple weeks ago. The new owner, which is a car collector, wanted it on 91 octane. I swapped over the fuel and did some quick road logs and then put it on the dyno. I actually make something like 368 whp, but dialed it down a touch as the new owner didn't care for the extra power... He loved the way it was at 350whp. This tune actually made more power after some heat soak from a back-to-back pull. Sounds perfect for a street car.

Here is my E85 vs 91 octane dyno's.

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Old 11-27-2019, 02:22 PM   #2938
NighthawkSTI
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Default

Quote:
Originally Posted by 1qukSti07 View Post
I finally finished break-in and got the car tuned. So far the car is running amazingly, this turbo rocks!

Main components for the build:
-Built block (Darton sleeves, Manley pistons and rods, king bearings)
-Built heads (stock cams, Manley springs and titanium retainers, GSC valves, and in-house PnP)
-EFR7163 with external WG routed back into the downpipe
-Custom FMIC with rotated intake mani
-FIC 1650cc injectors with hardwired walbro 450


I do all my own fab and engine building, aside from the machining.

I mainly use the car for AutoX and track days. On the last build and tune (26psi) I ran 11.5 @123 (I'm not much into drag racing). I'll take the track soon and try to dip into the 10s.

The current tune is by Mikey Botti, peaks at 29.6psi and tapers to 27psi by redline. We pulled a few degrees out of the tune in the midrange to keep some kind of longevity for this engine lol

Below is the virtual dyno, I'll be taking the car to a real dyno in the next few weeks for a comparison.

I highly recommend this turbo for anyone from a daily to track car!



WOW! That car is amazing and engine looks great!
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Old 11-29-2019, 01:49 PM   #2939
yamahaSHO
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Member#: 73932
Join Date: Nov 2004
Chapter/Region: RMIC
Location: Denver
Vehicle:
2005 STi EFR 6758
04 S2000 EFR 7064

Default

Got some left over stuff that someone here might be able to use. Both are new, but I have a Boost Resource/Turbomotiv turbo blanket for a B1 frame and a Full-Race mount for a 4-port EBCS on a B1 frame.

Open to offers...



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Old 11-30-2019, 12:19 PM   #2940
NighthawkSTI
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$20 ?
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Old 11-30-2019, 01:09 PM   #2941
yamahaSHO
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Member#: 73932
Join Date: Nov 2004
Chapter/Region: RMIC
Location: Denver
Vehicle:
2005 STi EFR 6758
04 S2000 EFR 7064

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Open to more reasonable offers.
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Old 12-02-2019, 05:27 PM   #2942
Waddlz
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Member#: 395275
Join Date: Jul 2014
Chapter/Region: RMIC
Location: Brighton, CO
Vehicle:
2012 STi
SWP

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$10 ?
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