IHI VF 30/34/35
11 March 2003, 07:39 PM
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some information from www.nasioc.com
VF22: The VF22 is the largest VF turbo with a 48mm compressor housing and a 5 blade compressor wheel. The exhaust housing is a P20. This is the standard turbo on STi Version 2 (1996) and first 100 of the 22B (1998). This is a RHF5HB Ball Bearing type turbo. The VF22 has the largest potential for peak horsepower and highest boost levels in the IHI model range. It is capable of running up to 25 psi. Turbo lag is minimal, spool up is around 3300 rpm. Expect to max out the VF22 somewhere in the 400-450 hp range. Turbo is a direct bolt-in replacement for your WRX's factory unit, requiring no additional parts. This turbo breathes easier in the top and mid ranges, and has been known to give gains of about 20% in the horsepower department, and 30% in torque.
VF23: The VF23 is similar to the VF22 but the compressor housing is 46mm and incorporates a 7 blade design compressor wheel. The exhaust housing is the same as the VF22. This is the standard turbo on the STi Version 3 (1997). This is a RHF5HB Ball Bearing type turbo.
VF29: The VF29 is similar to the earlier VF28. The compressor housing is 46mm and incorporates a 7 blade compressor wheel. The exhaust housing is a quicker spooling P18. This is the standard turbo on the STi Version 6. This is a RHF5HB Ball Bearing type turbo.
VF30: The VF30 has a bigger compressor than the VF23 at 47mm. It incorporates a 9 blade compressor wheel. The core is a divided thrust bearing and has a P18 exhaust housing. This is the standard turbo on the New Age Sti.
VF34: The VF34 is similar to the VF30 but has improved spool up due to roller bearing design. This is the standard turbo on the New Age Sti RA Spec C.
VF35: The VF35 has identical internals as the VF30 and it uses divided thrust bearings. However, the exhaust housing is a P15 which means this turbo will have fantastic spool characteristics. This turbo is standard on the new WRX Type RA. LIMITED SUPPLY.
Now I know that the VF35 came with the euro STi but wonder if it really came with some of the WRX Type RA, since it is a fantastic turbo to be used on Group N applications with the 32mm restrictor were the expected power levels are near 280bhp .....
Carlos H.
[Edited by carlos_hiraoka - 11/3/2003 7:41:26 PM]
VF22: The VF22 is the largest VF turbo with a 48mm compressor housing and a 5 blade compressor wheel. The exhaust housing is a P20. This is the standard turbo on STi Version 2 (1996) and first 100 of the 22B (1998). This is a RHF5HB Ball Bearing type turbo. The VF22 has the largest potential for peak horsepower and highest boost levels in the IHI model range. It is capable of running up to 25 psi. Turbo lag is minimal, spool up is around 3300 rpm. Expect to max out the VF22 somewhere in the 400-450 hp range. Turbo is a direct bolt-in replacement for your WRX's factory unit, requiring no additional parts. This turbo breathes easier in the top and mid ranges, and has been known to give gains of about 20% in the horsepower department, and 30% in torque.
VF23: The VF23 is similar to the VF22 but the compressor housing is 46mm and incorporates a 7 blade design compressor wheel. The exhaust housing is the same as the VF22. This is the standard turbo on the STi Version 3 (1997). This is a RHF5HB Ball Bearing type turbo.
VF29: The VF29 is similar to the earlier VF28. The compressor housing is 46mm and incorporates a 7 blade compressor wheel. The exhaust housing is a quicker spooling P18. This is the standard turbo on the STi Version 6. This is a RHF5HB Ball Bearing type turbo.
VF30: The VF30 has a bigger compressor than the VF23 at 47mm. It incorporates a 9 blade compressor wheel. The core is a divided thrust bearing and has a P18 exhaust housing. This is the standard turbo on the New Age Sti.
VF34: The VF34 is similar to the VF30 but has improved spool up due to roller bearing design. This is the standard turbo on the New Age Sti RA Spec C.
VF35: The VF35 has identical internals as the VF30 and it uses divided thrust bearings. However, the exhaust housing is a P15 which means this turbo will have fantastic spool characteristics. This turbo is standard on the new WRX Type RA. LIMITED SUPPLY.
Now I know that the VF35 came with the euro STi but wonder if it really came with some of the WRX Type RA, since it is a fantastic turbo to be used on Group N applications with the 32mm restrictor were the expected power levels are near 280bhp .....
Carlos H.
[Edited by carlos_hiraoka - 11/3/2003 7:41:26 PM]
03 November 2003, 02:46 PM
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Hi guys,
Would like to know if the compressor cover of a IHI VF35 turbo is the same as that of the IHI VF34 ?
AFAIK the VF30 and VF34 are almost identical, except for the fact that one is roller bearing and the other one is sleeve bearing. But both have the same compressor cover and P18 exhaust housing.
Carlos H.
Would like to know if the compressor cover of a IHI VF35 turbo is the same as that of the IHI VF34 ?
AFAIK the VF30 and VF34 are almost identical, except for the fact that one is roller bearing and the other one is sleeve bearing. But both have the same compressor cover and P18 exhaust housing.
Carlos H.
03 November 2003, 06:49 PM
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I beleve it's identical to the VF30 and it's the turbine casing thats different between the 30 and 35. That and 35 is roller bearing. dunno if the 30 is or not.
Don't quote me on this though.
Don't quote me on this though.
03 November 2003, 07:25 PM
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All I know is that the VF35 (very nice 300bhp turbo) has a P15 exhaust housing ..... if the compressor cover of the VF 30/34 is the same as the one of the VF35 then I wonder what is the real difference, the compressor wheel must be very similar, or is it that the turbines are different ?
Carlos H.
Carlos H.
03 November 2003, 11:29 PM
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Mark (EMS), you seem to have a fair bit of experience with this VF35's ..... are they really ball bearing turbos or just sleeve bearing ? ..... other than that the VF35 just seems to be your regular VF30/34 with a P15 exhaust housing.
Carlos H.
Carlos H.
