Welcome to the North American Subaru Impreza Owners Club Tuesday November 19, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC General > Newbies & FAQs

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 10-14-2019, 12:07 PM   #826
WRXnick16
Scooby Specialist
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default

Some details I found on the VF58 from Giorgio Provinciali at Advanced Sports Engineering Lab.

IHI VF58 twin scroll ball bearing turbocharger - ST14411ZR010
Used on the S206, S207 & S208
Larger turbo inlet ID (5mm larger = 54.2mm)
6 blade compressor wheel
Titanium turbine wheel (9 blade)
Modern version of the VF42 & successor to VF56
Compressor housing designed for DBW throttle body
~350 whp

Quote:
Originally Posted by Advanced Sports Engineering Lab
https://www.facebook.com/advancedspo...57374465019605
R205s dedicated high flow catalyzer and S208s IHI VF58 can now output a peak of power at about 7200 rpm (rpms are electronically limited to 8250) and an almost-zero lag twinscroll boost which peaks max torque from 2500-2800 to 4800 rpm. This is the ultimate iteration.
Quote:
Originally Posted by Advanced Sports Engineering Lab
VF56 (ST14411ZR000) basically was the DBW version of VF42. It was stock on R205.

VF58 (ST14411ZR010) is stock on s206/207/208.

Both have 9 blades TiAl exhaust wheel, ecc

VF52 has same compressor wheel diameter size as 56/58 and its compressor is 100% interchangeable over their CHRAs (housings are not)

56/58 are very rare
Quote:
Originally Posted by Advanced Sports Engineering Lab
New gen IHIs like VF49, VF53, VF56, VF58 have a slightly larger turbo inlet and a slightly different compressor angle to better fit new ICs and throttle bodies.

VF42 turbo inlet ID = 49.2mm
VF58 turbo inlet ID = 54.2mm
* Registered users of the site do not see these ads.
WRXnick16 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-14-2019, 12:38 PM   #827
WRXnick16
Scooby Specialist
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default

S209's HKS Turbo
Single scroll, thrust bearing
65mm compressor wheel
56mm turbine wheel
HKS' successor of the VF48 (6% larger turbine & 8% larger compressor)

Likely an exact match to the WRX STI TC 380 released in Japan last year. The TC 380 uses the HKS GT III RS turbocharger found in the STI Sports Turbine kit, part number 11004-AF013. It seems very likely that the S209 uses a similar kit with a few modifications.

The S209's peak power is carried 400 rpm further than the standard STI (310 hp @ 6,000 rpm vs 341 hp @ 6,400 rpm) while peak torque comes on 400 rpm sooner (290 lb-ft @ 4,000 rpm vs 330 lb-ft @ 3,600 rpm). Numbers are rated at 16.2 psi on VF48 vs 18.9 psi on HKS.

The advertised power numbers for the S209 imply that the S209's HKS turbo spools faster and carries power further.. that could be a worthy upgrade if it truly delivers more power without any low-end compromise.
WRXnick16 is offline   Reply With Quote
Old 10-14-2019, 01:29 PM   #828
WRXnick16
Scooby Specialist
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default

2015+ WRX FA20 turbo
Garrett MGT2259S
Twin scroll, ball bearing
Turbo Inlet ID: 47mm
59mm compressor 6+6 blade (unconfirmed size)
50mm turbine 9 blade (unconfirmed size)
WRXnick16 is offline   Reply With Quote
Old 10-16-2019, 12:30 PM   #829
WRXnick16
Scooby Specialist
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default

Some more on the VF56 & VF58:


VF58:




VF42 vs VF58:








VF56:
WRXnick16 is offline   Reply With Quote
Old 10-16-2019, 12:39 PM   #830
WRXnick16
Scooby Specialist
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default

Some interesting dyno charts from Subaru.


  • S206: EJ207 with VF58 (ELH, twin scroll, ball bearing turbo, titanium turbine)
  • GRB Spec C: EJ207 with VF53 (ELH, twinscroll, ball bearing turbo)
  • GRB: EJ207 with VF49 (ELH, twin scroll, journal/thrust bearing turbo)
  • GVB/GVF: EJ257 with VF48 (UELH, single scroll, 'advanced' journal/thrust bearing turbo)
Notice how late the torque curve comes on and how early it drops off on the EJ257. I know it's a single scroll, journal bearing turbo, but I expected the extra 463cc of displacement to help offset that a bit. The UELH certainly doesn't help the situation.

It would be interesting to see what the EJ257's power curve looked like in comparison with an ELH & twin scroll, ball bearing turbo.
WRXnick16 is offline   Reply With Quote
Old 10-16-2019, 12:45 PM   #831
WRXnick16
Scooby Specialist
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default

A comparison of the JDM S4 FA20 & EJ207 powerbands..

WRX S4 FA20

Max Power: 221kW (300PS) / 5600rpm
Max Torque: 400N・m (40.8kgf・m) / 2000-4800rpm
Engine upper limit rotation speed: 6500rpm

STI EJ207

Max Power: 227kW (308PS) / 6400rpm
Max Torque: 422N・m (43.0kgf・m) / 4400rpm (90% of maximum torque @ 2400rpm)
Engine upper limit rotation speed: 8000rpm

They both have a nice "table top" peak torque plateau thanks to the ELH & twin scroll turbo. The EJ207's peak torque band is a bit higher and narrower, but carries power higher into the RPM range developing a bit more peak HP.

It'll be interesting to see what Subaru can do with the next gen FA powered STI without having to worry about stepping on the EJ's toes. The FA has a lot of potential especially with some stronger rods, a larger turbo & tmic, and a higher flowing head package (intake manifold, ports, cams, valves, etc.). Especially if they use the FA24DIT to bump the displacement up to 2.4L.
WRXnick16 is offline   Reply With Quote
Old 10-20-2019, 10:25 PM   #832
WRXnick16
Scooby Specialist
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default



EJ257's VF48 - single scroll, journal bearing turbo
EJ207's VF49 - twin scroll, journal bearing turbo

Quote:
IHI VF48
(250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the USDM Subaru WRX STI MY08+. The primary difference between the VF48 and the VF43 used previously on STIs is the more advanced bearing design.

IHI VF49
(250-325whp, twin scroll)
This is the standard equipment turbocharger used on the JDM Subaru WRX STi MY08+, twin scroll turbine housing, thrust bearing. Compressor housing designed for DBW throttle body.
WRXnick16 is offline   Reply With Quote
Old 11-12-2019, 06:35 PM   #833
iKhmaiFoSho
Scooby Newbie
 
Member#: 494584
Join Date: Nov 2018
Default

Awesome!
iKhmaiFoSho is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Subaru Wagons listed first on 10 Used Cars that Seem to Last Forever pepperjack News & Rumors 74 07-14-2015 08:07 AM
is there a Subaru turbo list? housedj General Community 8 03-18-2009 01:48 PM
subaru forum list 949 General Community 10 11-02-2005 12:32 AM
Subaru wish list carrera News & Rumors 9 06-19-2002 09:45 PM
('93-'01) Subaru Mailing List rubadub Impreza Forum 3 08-18-2001 03:40 PM

All times are GMT -4. The time now is 09:33 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.