legacycentral bbs

so what is the good and the bad of the vf10

it's not big enough

lol that is what is am thinking

isn't that one of the turbo's from the JDM twin turbo motor?

No, I don't think it is. I have 2 turbos from my EJ20H legacy twin turbo motor and they're VF13 and VF14 I believe. I thought VF10 was bigger, these ones are pretty small.

o hmmmm.... I think it's off of some JDM motor though isnt it? I havent heard of them very often

left--->RHB52XW (VF10) vs. GT3071R<---right i guess

Mattheww044 wrote:o hmmmm.... I think it's off of some JDM motor though isnt it? I havent heard of them very often

Yes. JDM Legacy GT single turbo 1989-1993.

ahh.... it doesnt look as small as the vf-11 in the pic but I could be totally wrong.

^ What do you mean? The turbo in the pic is a VF10, not 11.

VF10 is an EJ20G turbo off a Legacy RS with Automatic Tranny...


VF8 is manual tranny...


VF10 is a good turbo for quick spool and some power

Ah, ok. I have a VF8 on my hybrid setup. I was told it was slightly larger than a TD04, although it certainly doesn't feel any more powerful. I also suffer from some boost creep in the upper rpms.

impreza_GC8 wrote:^ What do you mean? The turbo in the pic is a VF10, not 11.

I know, thats why I said it doesn't look as small as the vf11. I just worded it wrong haha. I figured the VF10 would be smaller than the VF11, but that appears to be a little bigger actually.

lol dude i dont know i found that pic on google pics so i could be wrong but i saw a vf10 the other day at a friends house and it is not like the vf11

With the numbering system, size of unit doesn't correspond with number. It's the higher the number, the newer the unit.

The 8 came before the 10, and the 10 came before the 11...so on and so forth.

ahhh I see. Well there is an obviously large size difference between the vf11 and the vf39, and wasn't sure what exactly the numbers meant....

o ok cool

For example, I have a vf-12, its larger than the 8, 10, and 11. Are we clear on this now? Just trying to help.

Wait, so it does correlate with size?

i_c_the_light wrote:With the numbering system, size of unit doesn't correspond with number. It's the higher the number, the newer the unit.

The 8 came before the 10, and the 10 came before the 11...so on and so forth.

not trying to cause an argument or anything, but just something I have always wondered but never known. I always figured it correlated to size, but thats why I asked because I wasnt sure

that is what i am saying so is it just a number or is it the size?

thats what im trying to figure out haha

Someone mentioned this before, but the number doesn't relate to it's size. It relates to the release number, eg. MkIV, MKV, etc.

From this website:

http://www.rexnet.com.au/forum/index.ph ... opic=48293

you can see the VF-22,23 & 24 (among other turbos compared)

14.7 PSI:
IHI VF 23/24 423 CFM at 14.7 PSI
IHI VF-22 435 CFM at 14.7 PSI


18 PSI:
IHI VF 23/24 388 CFM at 18 PSI
IHI VF-22 460 CFM at 18.0 PSI < flows much more at 18 PSI

Doing a google search, VF8>VF10>VF11 in regards to flow rate, but I didn't see any numbers.

Here's a nice list for y'all. From our 'friends' @ NASIOC. I don't think it's 100% accurate, but pretty close:

IHI VF10
This is the standard equipment turbocharger used on the USDM Legacy 4EAT MY91-94. No other information known at this time <incorrect-VF10 is an EJ20G turbo off a Legacy RS with Automatic Tranny... Thanks, 555BCTurbo>

IHI VF11
This is the standard equipment turbocharger used on the USDM Legacy 5MT MY91-94. No other information known at this time. <And the 4EAT USDM Legacy EJ22T>

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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
Info

So as stated above it's not about size but age......the older numbers are lower, but some are more powerful than the newer/bigger numbers: VF22> VF39

ok cool
so then is you want up to 325whp you should get a vf22 and higher?

ahhh i see. Thanks

the vf22 seems like a VERY solid turbo