Depends what you want Coober...There various Sizes of IHI Some laggy Than others, Some with P18 & P20 Housings Ect....
I Went with the VF23 as it gives a Good 320-330bhp and is one of the best fast Spooling Turbo Around...And Fastest out of the IHI and an alround Street Turbo...
Heres a article from Andy Forrest Website Which gives a Good Understanding...
IHI turbo.
The VF series (VF22, VF23, VF24, VF29, VF30) are the most common direct replacement turbos. All VF-series turbochargers use the same roller bearing, water-cooled core assembly. The differences are in their wheels and housings to achieve different flows.
The VF22 has the largest potential for peak horsepower. In other words, in the IHI model range, the VF 22 supports the highest boost levels. It is capable of running up to 25 psi. Because it is a roller bearing turbo, turbo lag is minimal...the boost comes on around 3300 rpm. Expect to max out the VF22 somewhere in the 400-450 hp range.
The VF23 starts the middle ground. It comes on boost around 3100 rpm and is capable of running 20 psi of boost. Expect to max out the VF23 somewhere in the 300-350 hp range.
The VF 24 starts to come on around 2900 rpm and will significantly improve power through the mid range over the stock TD04 turbo. However, the VF 24 is only capable of running around 17 psi.
The VF23 and VF 24 are a great replacement for those who value driveability higher than maximum power.
The VF29 & VF30 delivers a very wide increase in torque over the standard TD-series turbos. It is important to note that the VF30 is not a roller bearing turbo.
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VF22
This turbo has the highest output potential of all of the IHI VF series turbos and is the best choice for those who are looking for loads of top end power. The top end power however, does not come without a cost. The VF22 spools significantly slower than the rest of the IHI models due to the larger P20 exhaust housing and is much less suited for daily driving than some of the other models. Although the largest VF series turbo, the VF22 is not quite optimal for stroked engines or those who wish to run more than 20PSI of boost.
VF23
This turbo is considered a great all-around turbo. Like the VF22 it utilizes the largest P20 exhaust housing. This housing is mated with a smaller compressor housing of the of the VF24. This turbo is considered optimal in applications with range from mild to slightly wild. It does not have the same top end power of the VF22, but spools up significantly quicker.
VF24
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.
VF28
This turbo came standard on the STi Version 5. In terms of overall size, it is smaller than the VF22, VF30 and VF34, and about same size as the VF23.
VF29
This Turbo is nearly identical to the VF24, with the same compressor and exhaust housings. However the compressor wheel in the VF29 is 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.
VF30
The VF30 is commonly considered the best bang for the buck turbo in the IHI VF series line. A relatively new model 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 results in increased output potential without the lag associated with the VF22. Although it doesn't offer the top end supremacy of the VF22, the VF30 is a great compromise between these unit and the quicker spooling models.
VF34
The VF34 is nearly identical to the VF30, with the same exhaust housing and compressor. However the VF34 goes back to the ball bearing design, and in doing so achieves full boost approximately 500RPM sooner than the comparable VF30. The VF34 is the most recent IHI design and as such costs slightly more than its counterpart. Top end performance and maximum output are identical to the 30.
VF35
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.
more info (TWIN SCROLL) NOT FOR AVAIBLE 1.8T Manifolds Yet
VF36
Roller bearing version of the twin scroll VF37, also has a titanium turbine and shaft for even quicker spool. Same compressor housing as VF30/34, however twin scroll P25 exhaust housing provides slightly better top end output due to reduced exhaust pulse interference. This turbo is good for 400HP and used on JDM STI Spec C from 2003 onwards.
VF37 (thrust bearing)
Enter the age of twin scroll IHI turbos. Same compressor housing as VF30/34, however has a new twin scroll P25 exhaust housing that provides slightly better top end output due to reduced exhaust pulse interference. Twin scroll also provides better spool up for improved low down response over the VF30/34. This turbo is good for 400HP and used on JDM STI from 2003 onwards.
VF38
Twin scroll turbo with titanium turbine and shaft. Smaller compressor housing than VF36/VF37 provides tremendous spool up capabilities but less top end than VF36/37. The spool capabilities of this turbo are demonstrated on the JDM Legacy GT, which reaches peak torque at 2400RPM.
VF39
Single scroll turbo used on USDM STI and latest 2.5L STIs released internationally. Smaller than VF30/VF34.
VF42
Exclusive turbo to the S203/S204 models, this features a twin scroll design with a slightly larger compressor than the VF36/37 turbos and different turbine design (more blades). The VF42 is a roller-bearing turbo and is likely of similar size to the VF22 turbo, but with twin scroll exhaust housing for faster spool and superior top end performance due to reduced exhaust pulse interference.
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have you got any pics of yours fitted so i can see the work involved in fitting this and your spec sheet of what i need?
You Best of Reading my Build Thread mate Page 64 onwards as theres a full Right up and Pics to go with it too...
Some pics for you of just some of the bits ....
All My Hard work complete Before i ripped it apart for the Engine Rebuild
as for the spec im Using
IHI Turbo
IHI Manifold
k03 Oil feed & Retainer
Custom water Coolant Pipes M10x1.5 k03 banjo bolts
Custom 3'' Downpipe
Revo stage 3
SPS3
Genesis 550cc Injectors
Custom 3'' TIP
Walbro Fuel Pump
Thats All you need for a ihi conversion well the main bits anyway and u'd just need to source bits to connect the pipes up ect...
Some pics for you of just some of the bits ....
All My Hard work complete Before i ripped it apart for the Engine Rebuild
as for the spec im Using
IHI Turbo
IHI Manifold
k03 Oil feed & Retainer
Custom water Coolant Pipes M10x1.5 k03 banjo bolts
Custom 3'' Downpipe
Revo stage 3
SPS3
Genesis 550cc Injectors
Custom 3'' TIP
Walbro Fuel Pump
Thats All you need for a ihi conversion well the main bits anyway and u'd just need to source bits to connect the pipes up ect...
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basdically need turbo, lines, mani and down pipe then ive got everything else any good links on where to get it from? mani and downpipe ?
Manifold would be Either Jabbasport Manifold or Tig-art one...As for the downpipe its a custom Jobbie im affraid as the room near the rear engine mount is prober tight....
Yeah you can use the k03 Oil feed and K03 Oil return which needs the holes in it slight widering which i simple enough as the holes on the IHI turbo a just that bit slight off key...As for the banjo bolt on the K03 Oil line on the IHI turbo is a custom one from jabbasport which is £20 Posted with 2 washers...
If you Deside to use Banjo Fittings on the Coolant side of things you can use the Oil K03 banjo Bolts which are 2x M12 x 1.5mm and fit perfectly in the turbo...Or you could go down the -AN fitting route..Saying that Ring jabbasport as they can make the lines for you but i desided to do my own with 12mm braided Coolant line 1x double barb end and 2x Banjos which i got for Utter penny off scooby net...
Yeah you can use the k03 Oil feed and K03 Oil return which needs the holes in it slight widering which i simple enough as the holes on the IHI turbo a just that bit slight off key...As for the banjo bolt on the K03 Oil line on the IHI turbo is a custom one from jabbasport which is £20 Posted with 2 washers...
If you Deside to use Banjo Fittings on the Coolant side of things you can use the Oil K03 banjo Bolts which are 2x M12 x 1.5mm and fit perfectly in the turbo...Or you could go down the -AN fitting route..Saying that Ring jabbasport as they can make the lines for you but i desided to do my own with 12mm braided Coolant line 1x double barb end and 2x Banjos which i got for Utter penny off scooby net...
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as ive got stage 3 revo already will it be a totally diff map? or will they just be able to tweek my old one?
Im Running Revo Stage 3 With Boost 9 And Timing 4 and it ran really well made 243g/s @ 5.9krpm And had more togo....
I ran logs with stage 3 and 0 cfs and so there for had room for improvement with the Timing...Boost was 1.45 via a MBC .....
Hi, i had a chat with Revo direct about this as i to am fitting an IHI set-up and was told it will run on the stage 3 map but for the best gains a standalone boost controler is required as the map was for a GT28 and they did not think there was enough adjustment in the map (only regarding boost, no other factors) to get the best from an IHI.
Will clive be mapping it for you if you change to IHI?
Yes lots he put the stage 1 on the car for the previous owner then he done my stage 2 and has tweaked it a couple of times since when i have changed the spec etc, also done the charity rolling road day there the other year.
I was chatting to clive and danny on the rolling road day, they asked what i had in mind next as the car is at the limits of the stage 2 set-up, so i said an IHI on stage 3 and thats when they said they had another customer doing stage 3 on a gt28 guess that must of been you as i think its only you and me that go there with ibiza's,
If its any help clive didn't think there would be any issues with running an IHI on stage 3.
vf22 making 400-450bhp?
aint going to happen, not even close
I thought the figures above had been pinched from a scooby site, so relate to 2-2.5l lumps not little 1.8t
, even then would have thought 450 would be a bit optamistic.If you are going IHI then I would choose a TD05 probably the 16G6 or 18G as the VF series does seem to go pop quite regularly and the TD series are rebuildable and are slightly better turbos imo. That could be people pushing the VF ones too hard though.
Yeah there no stock IHI that can make 400bhp But doesnt it say it in HP?
Pj Yeah the TD series would be a Awesome Shout tbh but they spool slightly later than the vf Series But if you wanted High Bhp and full boost by 3000rpm it aint gonna happen...
Suppose its take a little give a little,Like bill said Run them correclty and they will be fine sayin that some scooby owner have run the 34 @ 1.6bar and never had any problems but suppose its different on a 1.8T...
The k03 hybrid is a good shout if you want high 200's but thats were it will stop..With the IHI manifold & Garrett manifold theres always an ungrade without changin everything..If i wanted more power which i do in a few months when funds do allow il be putting a Td05H-18G on...But all il have to change would be Coolant Banjos And Silicone Hose On the compressor housing...Everything else will match up...
If you know how to use a spanner or no someone who does engine internals are not dear...If a Full engine build via Just Parts & tools isnt Uber expensive....
Mat
Guest
That's what I'm thinking. Do as much as possible myself/with the help of mates, and try to source as much as possible
I thought the figures above had been pinched from a scooby site, so relate to 2-2.5l lumps not little 1.8t
still not going to happen.
its just out of puff.
what IHI are on the 2.5ltr motors?
Not 100% sure Bill my VF38 is listed as ej25 fitment but its a legacy turbo and not from uk cars as far as i can see from the info i can find.
VF39 is the turbo on the 2.5 scooby not sure what year though.
Also seen a mention of VF36/37 being ej25 fitment and latest genaration Vf44 whatever that may be, most of them seem to relate to legacy fitment, and it seems as though there is also a 2.2 turbo lump fitted with an IHI unit but no idea which one.
VF22 seems to get quite a mention as a bolt on upgrade for the 2.2/2.5 but i have no idea what it is replacing.
My mate is running ihi vf34 on his mk3 and i'am running gt30 he made 338bhp and I made 460bhp mine spools up quicker than his and obviously goes quicker but when I have the boost controller on my lowest setting which at a guestamit would be around 360 it still leaves his for dead and mines running alot safer psi wise as his is maxed out it's realy worth doing alot of research to get the exact turbo for your set up air rotios hot side and cold side are very vital gettin it right will = good results and less lag as poss i've ran ko3s ,ko4 and gt28rs and the big gt30 is just mental on full chat!!!!
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