max power for a vf30 turbo ??
27 November 2007, 09:48 PM
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They run to about the same as a VF22, 400 to 450hp (I'd say lower end) but the VF30 (journal bearing) and VF34 (ball bearing) have a much more efficient compressor wheel and run lower intake temps....very good IHI turbo.
27 November 2007, 10:02 PM
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27 November 2007, 10:17 PM
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Blouch Evo III TD05H-16G
(39 lb/min, 275-390whp, Bolt-On)
Forced Performance 18G
(605cfm, 275-390whp, Bolt-On)
Bunch of jokers the yanks! (sorry new owners from USA)
Anders
27 November 2007, 10:29 PM
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Was a little surprised at them figures !!!!!!!!
I was told with the right mods it would run up to 360 bhp with similar torg but would be one hell of a fast turbo on the run
tony
I was told with the right mods it would run up to 360 bhp with similar torg but would be one hell of a fast turbo on the run
tony
27 November 2007, 10:46 PM
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Ok then, theoretically a the VF30 and 34 should be able to provide around 420hp at the flywheel. If this is achieved or not is to do with the volumetric efficiency of your motor and a whole lot of other factors I have not got the time or typing skills to deal with here. Needless to say all IHI turbos are limited by their design for homologation (restrictor)....if you want consistent big HP get something else but expect to pay.
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27 November 2007, 11:14 PM
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420bhp is totally unrealistic on pump fuel, on a Subaru, from a turbo capable of 460cfm, that's 1.095cfp per 1 bhp.
As far as the US figures go, as a rule of thumb, we get at the flywheel, what they get at the wheels.
Mark.
As far as the US figures go, as a rule of thumb, we get at the flywheel, what they get at the wheels.
Mark.
28 November 2007, 12:01 AM
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I had one on a pretty much stock 95 WRX with a RA ECU and equal lengths on and it happily did 160kw at all 4 on a reliably set up 4 wheel dyno on 98 pump fuel (BP) at 1.1 bar. The same motor is currently in a guys RS and putting out 180kw with a lot more mods and a rebuild in sight.
The other nice thing about them is if you want to run anti-lag (don't know why anyone would), they won't die quick like a ball bearing turbo will.
If it's cheap, buy it, ceramic coat the exhaust housing and give it heaps.
29 November 2007, 12:50 AM
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But does anyone know what the vf34 tops out at then? I fitted one to mine a bit back
29 November 2007, 02:14 PM
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01 December 2007, 07:09 AM
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I'll let someone else field the max power side of this (it's less than a VF22 tho'), the main characteristic you'll notice with a VF23 is the taper away of boost from about 6500 rpm is quite pronounced in comparison to a VF22 or VF30/34.
The VF22 is very strong up top but a bit laggy for a BB turbo.
The VF34 is very similar to the VF23 as far as lag or lack there of, but much more like a VF22 up top. The VF30 because of the journal bearing centre suffers a bit of lag but essentially has the same driving character of a VF34.
I would suggest for power the VF23 (if you use what I said before) is just under 400hp (or if you use other estimations) about 320hp.
This (VF22 and 23) was essentially the standard used by APS and AVO etc to establish their base range of direct fit turbos for early Subarus, hence the names of their replacement turbos. They targeted the base model of their ranges at close to the max power of the corresponding IHI units with more reliability built into the wheel sets for consistent abuse, the remainder of the ranges went up from there into territory the IHI unit was not designed or intended to enter considering their primary purpose.
The VF22 is very strong up top but a bit laggy for a BB turbo.
The VF34 is very similar to the VF23 as far as lag or lack there of, but much more like a VF22 up top. The VF30 because of the journal bearing centre suffers a bit of lag but essentially has the same driving character of a VF34.
I would suggest for power the VF23 (if you use what I said before) is just under 400hp (or if you use other estimations) about 320hp.
This (VF22 and 23) was essentially the standard used by APS and AVO etc to establish their base range of direct fit turbos for early Subarus, hence the names of their replacement turbos. They targeted the base model of their ranges at close to the max power of the corresponding IHI units with more reliability built into the wheel sets for consistent abuse, the remainder of the ranges went up from there into territory the IHI unit was not designed or intended to enter considering their primary purpose.
01 December 2007, 09:31 AM
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Max power I have seen on a VF34 (In the UK and on Optimax as it was) was 362bhp with good quality supporting mods @ 1.5bar peak on a standard MY04 WRX....
Wouldn't expect the VF30 to be any different to this with similar mods and boost , just slower to spool....
Wouldn't expect the VF30 to be any different to this with similar mods and boost , just slower to spool....
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