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Old 07-04-2006, 08:24 PM   #1
C89ZX7R
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Default turbo upgrade chart

think someone should create a turbo upgrade chart

size of turbo , cfm , place to buy from

go from stock to insane . would help out alot and stop having most questions like what turbo should i get
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Old 07-17-2006, 02:42 AM   #2
MonsterRallySport
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Look to the stickeys... I have seen it a couple of times..
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Old 07-30-2006, 02:54 AM   #3
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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 highes 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 midrange 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 drivability 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.

----------------------------------------------------------------------------------------------------


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.

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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Old 08-04-2006, 04:38 AM   #4
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Nicccce Eric...lotsa useful info there...Now reconsidering my VF22..but damn i got it sooo cheap lol
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Old 08-07-2006, 11:45 PM   #5
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Wow just read all of that. Good stuff dude.
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Old 08-14-2006, 02:00 PM   #6
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Nice, now lets get some stats for the VF40
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Old 08-15-2006, 06:12 PM   #7
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so the VF-22 flows more than a VF-39???
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Old 08-15-2006, 07:08 PM   #8
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VF 42 ftw!!!
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Old 08-16-2006, 07:12 PM   #9
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Quote:
Originally Posted by Boxer112
so the VF-22 flows more than a VF-39???
Yes...
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Old 08-18-2006, 09:26 AM   #10
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nice upgrade for cheap and not overkill...might have to invest in vf22
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Old 08-21-2006, 12:38 PM   #11
karr1008
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SO, the most balanced of all is the VF22? Is that correct?
How does the IHI compare to let's say...a FP GREEN?

Thanks.
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Old 08-24-2006, 11:45 PM   #12
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i'm thinking about going with 36 or 37, i'm trying to do about 350whp daily driver , what should i choose? (why does it have to be so hard?)
i would like some info. are there differences? in the long run is it pretty much the same thing? if i find a deal on a good vf37 am i going to regret not waiting on the 36?


-adam

p.s. sorry just a couple of things i had to get off my chest.
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Old 08-27-2006, 07:12 AM   #13
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kool good info
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Old 09-03-2006, 11:21 PM   #14
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the mitsubishi turbos are very good as well
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Old 09-04-2006, 12:19 AM   #15
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stick with the vf30.
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Old 09-04-2006, 01:11 AM   #16
whateverwrx
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Big16g imo
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Old 09-19-2006, 06:34 PM   #17
jakecpdracing
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Quote:
Originally Posted by LegacyGt05 View Post
Nice, now lets get some stats for the VF40
Anyone?
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Old 09-28-2006, 08:03 AM   #18
mRgUnN
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Default Sweet Post!

Thanks for taking the time to write this down!

Regards,

mRgUnN
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Old 10-13-2006, 05:41 AM   #19
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so if I'm correct, vf 30, 34, 35, 36, 37 all has same compressor housing similar to vf22. vf22 has p20 exhaust housing, 34 has p18 exhaust housing with ball bearing. is it possible to make vf34 a p20 exhaust housing? that would give you quicker spool up than vf22 and more power than vf34

If i understand correctly, twinscroll turbos spool quicker and more top end, but need jdm down pipe and other parts because they need to be divided for twin scroll.

what is the difference in spool up between roller bearing and ball bearing, are they the same? what is thrust bearing, are they the ones on none ball or roller bearing turbos?
vf42 probably is the best ihi turbo then huh? probably too hard to find.
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Old 10-15-2006, 11:32 PM   #20
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is the vf42 a direct bolt on or does it require a different down and up pipe and manifold etc...??
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Old 10-20-2006, 02:00 PM   #21
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yeah in order for twin scroll to be effective, the air pulses from piston has to be divided so from exhaust manifold to up pipe to turbo needs to be divided in 2 piping. I'm not sure but i think you can custom the none-twin scroll down pipe to fit twin scroll turbos. definetly need up pipe and exhaust manifold.
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Old 12-16-2008, 05:53 AM   #22
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I have a VF37 kit ill let go.

Great setup for sure.
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Old 12-31-2008, 12:55 AM   #23
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I think GTscoob used to run a vf 22 or maybe a vf 29
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Old 08-10-2011, 03:24 PM   #24
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someone should add the new VF turbos to this the VF52 & VF48
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Old 08-15-2011, 09:30 AM   #25
Vlad
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This list is on the stickies as well as all over the internet.

One could see how someobody at some point decided to put together a list based on some facts and then it just got copied to death.

Then it got embellished with people's opinions, stated as facts, as usual.

I've counted the turbine blades of the VF42, there are 9. I've counted the blades of the VF36, there are 11.

So, it should read:
VF42, titanium aluminide turbine and shaft, LESS blades.

As far as the compressor and compressor housing: There really are only couple designs, they should be listed.

As far as how it's listed in the stickies:
VF42 titanium turbine and compressor.
Why would you change a lightweight alloy like the one used for the compressor, with something heavier like the TiAl?
There barely is any heat there, as compared with the turbine.
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