Jump to content
Ultimate Subaru Message Board

IHI (RHB5) VF2-39 specs...


Recommended Posts

mine is the VF2, came off an XT

 

im curious if the VF7 came from wagons?

 

already know vf11 is the legacy turbo

already know vf39 is the WRX STi turbo

 

back to the point.. specs! specs!

what do you want to know? can you be more specific?
Link to comment
Share on other sites

Not sure if this is the same turbo in this chart but does this help?
If i can remember right, the RHF's are different than the RHB.

 

RHF = new school

RHB = old school

 

what do you want to know? can you be more specific?

 

Eh, such things as:

 

stock boost setting

max avail. boost setting

EGT tolerances

 

basically anything that can distinguish specs between a VF2, VF7, VF11, VF39, etc etc etc

Link to comment
Share on other sites

if it was, it would say VF7 then instead of the VF2 stamped on the thing :-\ (wouldnt it??)

Not trying to put words in Will's mouth, but what I believe he meant was that funtionally they are equivalent, that the number difference reflects more of an application difference... as in, slightly different mount flange.

Link to comment
Share on other sites

Eh, such things as:

 

stock boost setting

max avail. boost setting

EGT tolerances

 

7-9PSI

max depends on the boost controller you usebut over 11psi will start to be inefficient unless you do some porting on the exhaust snailshell.

EGT- skies the limit as hot as you can get it.

Link to comment
Share on other sites

... EGT- skies the limit as hot as you can get it.

There will be a practical limit due to turbine material, and it would need to be derated with increased speed caused by trying to up the airflow/pressure. I would get a baseline from a properly running application, and be very careful about significantly exceeding this.

Link to comment
Share on other sites

gotcha

 

Not trying to put words in Will's mouth, but what I believe he meant was that funtionally they are equivalent, that the number difference reflects more of an application difference... as in, slightly different mount flange.
Link to comment
Share on other sites

OK, here's the scoop, I've been looking for flow/compressor maps for the RHB5 for years... They don’t exist, Warner-Ishi (IHI) never released any for the VF series.

The only one I’ve found is from the book “Turbochargers” by Hugh Maclnnes, it show a very sparse map (no efficiency lines) for the 311A and 393B trims… whatever those are?

RHB51.jpg

If anybody ever finds others please let me know.

 

Some info and flow mapping of the TD04-13G (WRX) and RHB5 in this thread:

 

http://www.ultimatesubaru.org/forum/showthread.php?t=22146&page=1&pp=10&highlight=flow+map+tdo4%2A

Gary

Link to comment
Share on other sites

  • 6 years later...
FWIW, I have a spare turbo reportedly off a EA82T that looks just like the one on my RX and Turbo coupe (both EA82Ts) that is stamped VF2.

 

Gary

 

I looked around and one of the places I ended up was here. So on with the reserection:)

picture.php?albumid=285&pictureid=3167

That's Turbo Spec. VF2 8407. I made note of the 2 in the PartsNo. And that unusual for me Serial No.

picture.php?albumid=285&pictureid=3168

What I've learned is there was a VF1. 1 thru 8, no 9 that I've found, then 10, 11, and so on. This one is a like new survivor I guess by the looks of it. I got it off an '87 Turbo Traction Wagon. I suspect it is from 1985 tho. I have VF4 as the most common. One of them is barely magnectic with a super magnet.

 

Doug

 

This list in some variation is all over the world.

Mitsubishi TD04L-13T

(390cfm at 14.7psi, 200-275whp, Bolt-On)

This is the standard equipment turbocharger used on the USDM Subaru Impreza WRX. It can be found on all the current model years from 2002-2007.

 

IHI VF10

This is the standard equipment turbocharger used on the USDM Legacy 4EAT MY91-94. No other information known at this time.

 

IHI VF11

This is the standard equipment turbocharger used on the USDM Legacy 5MT MY91-94. No other information known at this time.

 

IHI VF12

This is the standard equipment turbocharger used on the JDM Legacy RS MY89-93. No other information known at this time.

 

IHI VF13

This is the standard equipment primary turbocharger used on the JDM Legacy MY93-95. No other information known at this time.

 

IHI VF14

This is the standard equipment secondary turbocharger used on the JDM Legacy MY93-95. No other information known at this time.

 

IHI VF18

This is the standard equipment primary turbocharger used on the JDM Legacy MY96. No other information known at this time.

 

IHI VF19

This is the standard equipment secondary turbocharger used on the JDM Legacy MY96. No other information known at this time.

 

IHI VF20

This is the standard equipment turbocharger used on the JDM Legacy MY97. No other information known at this time.

 

IHI VF22

(490cfm at 18.0psi, 250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the JDM V3 Subaru Impreza WRX and optional on the JDM Subaru Impreza WRX STi 22b. Of all the IHI models, the VF22 has the largest potential for peak horsepower, and is capable of supporting the highest boost levels. It is capable of running up to 25 psi. The VF22 is a roller bearing turbo that utilizes the P20 exhaust housing.

Expect to achieve full boost with the proper mods and a quality tune between 3200-3700rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

NASIOC Member powerlabs Results

Purchase $800

 

IHI VF23

(388cfm at 18psi, 250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the JDM Subaru Impreza WRX STi 22b. The VF23 is a ball bearing turbocharger that utilizes the P20 exhaust housing like the VF22. This housing is mated with the smaller compressor housing of the VF24 for fast response and excellent low and mid-range performance. It does not have the same top end power of the VF22, but spools up slightly quicker.

Expect to achieve full boost with the proper mods and a quality tune between 2800-3300rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

NASIOC Member ride5000 Results

NASIOC Member overboost Results

 

IHI VF24

(425cfm at 18psi, 250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the JDM V4 Subaru Impreza WRX STi. This turbo shares its compressor housing with the VF23, however, this housing is mated with a smaller (P18) exhaust side. The smaller characteristics of this turbo allow it to provide ample bottom end power and quick spool. This turbo is very popular for Imprezas with automatic transmissions and Group-N rally cars.

Expect to achieve full boost with the proper mods and a quality tune between 2800-3300rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

NASIOC Members Davenow & mbiker97 Results

 

IHI VF25

This is the standard equipment primary turbocharger used on the JDM Legacy B4. Utilizes a thrust-bearing design and a P12 exhaust housing. No other information known at this time.

 

IHI VF26

(400cfm at 18psi)

This is the standard equipment primary turbocharger used on the JDM Legacy B4. Utilizes a divided thrust-bearing design and a B14 exhaust housing. No other information known at this time.

 

IHI VF27

(420cfm at 18psi)

This is the standard equipment secondary turbocharger used on the JDM Legacy. Utilizes a ball-bearing design and a P18 exhaust housing. No other information known at this time.

 

IHI VF28

(425cfm at 18psi, 250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the JDM V5 Subaru Impreza WRX STi.

Expect to achieve full boost with the proper mods and a quality tune between 2800-3300rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

 

IHI VF29

(425cfm at 18psi, 250-325whp, Bolt-On)

This is the standard equipment turbocharger on the JDM V6 Subaru Impreza WRX STi. The VF29 is nearly identical to the VF24, with the same compressor and exhaust housings. However, the compressor wheel in the VF29 has been changed slightly. The changes made to the compressor wheel in this model are generally viewed as improvements, and as such, this unit is typically chosen over the VF24. Has a different location for the pressure hose on the wastegate actuator.

Expect to achieve full boost with the proper mods and a quality tune between 2900-3300rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

 

IHI VF30

(460cfm at 18psi, 250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the JDM V7 Subaru Impreza WRX STi. The VF30 is a thrust-bearing turbo that utilizes the P18 exhaust housing of a VF24 and the compressor housing sized between a VF23 and a VF22.

Expect to achieve full boost with the proper mods and a quality tune between 3000-3500rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

NASIOC Member itsawagon Results

 

IHI VF31

Utilizes a P11 exhaust housing. No other information known at this time.

 

IHI VF32

This is the standard equipment primary turbocharger used on the JDM Legacy. It utilizes a ball-bearing design. No other information known at this time.

 

IHI VF33

This is the standard equipment primary turbocharger used on the JDM Legacy. It utilizes a P11 exhaust housing and a divided thrust-bearing design. No other information known at this time.

 

IHI VF34

(460cfm at 18psi, 250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the JDM V7 Subaru Impreza WRX STi Spec-C. The VF34 is nearly identical to the VF30 but has improved spool up due to its roller bearing design. It also utilizes a P18 exhaust housing.

Expect to achieve full boost with the proper mods and a quality tune between 3000-3500rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

NASIOC Member wrx1905 Results

NASIOC Member Sports Wagon Results

Purchase $850

 

IHI VF35

(425cfm, 250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the JDM Subaru Impreza WRX. The VF35 is similar to the VF34. It utilizes the same compressor housing and the same compressor inducer size. The differences are in the divided thrust-bearing design and the P15 exhaust housing. This allows the VF35 to spool slightly quicker than the VF34 at the cost of less top-end performance.

Expect to achieve full boost with the proper mods and a quality tune between 2800-3300rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

 

IHI VF36

(430cfm, 250-325whp, Modification Required)

This is the standard equipment turbocharger used on the JDM V8-V9 Subaru Impreza WRX STI Spec-C Type RA. The VF36 is a twin-scroll turbocharger that utilizes a ball bearing design, a P25 exhaust housing, and Titanium (possibly TiAl?) compressor wheel for improved spool. It is essentially a fast spooling VF34.

Expect to achieve full boost with the proper mods and a quality tune between 2800-3300rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

NASIOC Member dug-e-fresh Results 1

NASIOC Member dug-e-fresh Results 2

 

IHI VF37

(430cfm, 250-325whp, Modification Required)

This is the standard equipment turbocharger used on the JDM V8-V9 Subaru Impreza WRX STI. The VF37 is a twin-scroll turbocharger that utilizes a thrust bearing design and a P25 exhaust housing. It is essentially a fast spooling VF30.

Expect to achieve full boost with the proper mods and a quality tune between 2800-3300rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

NASIOC Member deathinacan Results

 

IHI VF38

The VF38 is a twin-scroll that utilizes a Titanium turbine and shaft. This turbocharger yields tremendous spool-up but offers less top-end than the VF36/VF37. The spool capabilities of this turbo are demonstrated on the JDM Legacy GT, which reaches peak torque at 2400RPM.

 

IHI VF39

(250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the USDM Subaru Impreza WRX STI. It can be found on all model years from 2004-2006. The VF39 utilizes a thrust bearing design and the P18 exhaust housing.

Expect to achieve full boost with the proper mods and a quality tune between 3000-3500rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles that utilize this turbo aftermarket. Though they are prone to cracking, VF39’s can be had for very cheap if bought used.

NASIOC Member trbowrx Results

NASIOC Member javid Results

NASIOC Member downsti Results

Purchase

 

IHI VF40

This is the standard equipment turbocharger used on the USDM Subaru Legacy GT. It can be found on all the current model years from 2005-2006.

Deadbolt Upgrade

 

IHI VF41

This is the standard equipment turbocharger used on the JDM Subaru Forester STI. It utilizes a P18 exhaust housing.

Info

Info

 

IHI VF42

This is the standard equipment turbocharger used on the JDM Subaru Impreza WRX STi S203 and S204. The VF42 features a twin-scroll design with a slightly larger compressor than the VF36/VF37 turbos and different turbine design (more blades). The VF42 is a roller-bearing turbo and is similar in size to the VF22 turbo, but the twin-scroll exhaust housing yields faster spool-up and a superior top-end.

 

IHI VF43

(250-325whp, Bolt-On)

This is the standard equipment turbocharger used on the MY07 USDM Subaru Impreza WRX STI. It can be found on both base STI's and STI Limited's. The VF43 utilizes a thrust bearing design and the P18 exhaust housing. The primary difference between the VF43 and the VF39 used previously on STI's seems to be the stiffness of the wastegate. The VF43 has a stiffer wastegate designed to reduce boost creep issues. Info

Expect to achieve full boost with the proper mods and a quality tune between 3000-3500rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles that utilize this turbo aftermarket.

 

IHI VF46

This is the standard equipment turbocharger used on the USDM Subaru Legacy GT MY07. The VF46 utilizes a new five-arc scroll design to improve low and midrange performance over the previous VF40.

 

Working through sorting out what's what with IHI Turbos.

Edited by Quidam
Link to comment
Share on other sites

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now
 Share

×
×
  • Create New...