Moin Leute,
die Infos habe ich im Netz gefunden und dachte mir, hier sind die auch gut aufgehoben.
VF22
This Turbo used on the V3 Subaru Impreza WRX and has the highest potential output of all of the IHI VF turbos thus making it a good choice for the tuner who is looking for lots of top end power.
You can with a good mapper/tuner and with the correct supporting modifications achieve 17psi by 3000rpm and is well capable up to +400hp.
As with all turbos the more top end power gained results in a slower spool up (more lag).This is because the VF22 uses the larger P20 exhaust housing, This the main factor in this spool issue and is not so much suited to daily driving than some of the other options available.
Although the VF22 is the largest VF series turbo, and can take highest boost levels of all the VF range it is not quite suited for stroked blocks running high boost of more than 20psi+
The VF22 is a ball bearing turbo using 485 comp wheel and as already mentioned the P20 Turbine Housing.
460cfm at 18.0psi
VF23
This Turbo Used on the JDM V3 Subaru Impreza WRX and was standard fitment choice on most 22B Subaru models.The vf23 is considered to be a great all-around turbo optimal for most applications from mild to slightly wild. You can with a good mapper/tuner Expect to achieve full boost anywhere between 2800-3300rpms and with the proper supporting mods is capable of power upto 350hp.
Like the VF22 above it uses the larger P20/18 exhaust housing. This housing is used with a smaller compressor housing of the of the VF24 for fast response (less lag) This is why it will not acheive the same top end power of the VF22, but spools up significantly quicker With great mid range power. The VF23 is a ball bearing turbo using 467 comp wheel and P18/20 Turbine Housing. 460cfm at 18.0psi
VF24
This turbo was used on the V4 Subaru impreza wrx sti, It uses the same compressor housing as the VF23 however, this housing is mated with a smaller (P1
exhaust side. The smaller characteristics of this turbo allow it to provide loads of bottom end power with very quick spool. This is why this turbo is very popular for Imprezas with automatic transmissions and Group N rally cars. Expect to achieve full boost with the correct supporting mods and a good map between 2800-3300rpms. The VF24 is not recommended for high performance engines, or if big boost is needed. Which makes VF24 better suited to mildly modified engines.The VF24 is a non-ball bearing turbo with a 467 comp wheel and P18 Turbine Housing.
VF25
This was the Primary turbocharger used on the JDM Legacy B4. Utilizes a thrust-bearing design and a P12 exhaust housing.
VF26
This was another turbo charger used on the JDM Legacy B4. Utilizes a divided thrust-bearing design and a P14 exhaust housing.
VF27
This is the standard equipment secondary turbocharger used on the JDM Legacy. Uses a ball-bearing design and a P18 exhaust housing.
420cfm at 18psi
VF28
This turbo came on the Subaru Impreza STi Version 5. In terms of its size, it is smaller than the VF22, VF30 and VF34, and about same size as the VF23. you would Expect to hit full boost with the correct supporting mods and a good map any where between 2800-3300rpms. 2002-2005 WRX owners will need fuel upgrades for this turbocharger and using correct ecu management is recommended for all vehicles.
425cfm at 18psi anything around 320bhp is achievable
VF29
This Turbo is basically identical to the VF24, having both the same compressor and exhaust housings. The only difference being the compressor wheel in the VF29 was changed slightly. The changes made to the compressor wheel in this model are generally viewed as improvements, Which makes this unit and as such this unit a better choice over the VF24. The VF29 also has a different location for the pressure hose on the wastegate actuator.As above it can reach power of around the 320bhp mark.425cfm at 18 psi
VF30
This is the standard choice of turbocharger used on the JDM V7 Subaru Impreza WRX STi.
The VF30 is commonly veiwed as the best pound for pound turbo in the IHI VF line.The VF30 features the same exhaust housing as the VF24 but a larger compressor side similar to the VF22. The combination of these two parts resulted in increased output potential without the lag often associated with the VF22. Although it doesn't offer the great top end power of the VF22, the VF30 is a great compromise between these units and the quicker spooling models. 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. 460cfm at 18psi and anything around the 325bhp mark is achievable.
VF31
Utilizes a P11 exhaust housing.