Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

VF 22, VF 23, or VF 34

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Old May 30, 2005 | 08:31 AM
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Car Info: Subaru WRX 2002
Cool VF 22, VF 23, or VF 34

Hey guys,
Trying to decide on a new turbo for my 02' WRX. Should I go with either the VF22, VF23, or VF34. I know that the VF34 spools quicker then the other two but I heard it losses some top end. I wanna run around 17 psi as a daily drive and I want me car to be reliable. I heard the lag with the VF22 isn't bad. Let me know fellas and what kinda numbers can I expect with supporting mods and FMIC
Old May 31, 2005 | 11:34 AM
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i dunno about numbers but the turbo doesnt lose its breath on the top end like the stock turbo its fine

i boosted to 1.5 bar one time it holds its boost
Old May 31, 2005 | 12:12 PM
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Stock turbo can be boosted to 1.5 bar, but it is not efficient there at all. Just a bunch of hot air.

I would go with a 34. 22 is ok too, but not 23. 23 is too small.
Old May 31, 2005 | 05:19 PM
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Originally Posted by Imprezer
Stock turbo can be boosted to 1.5 bar, but it is not efficient there at all. Just a bunch of hot air.

I would go with a 34. 22 is ok too, but not 23. 23 is too small.
i boosted my stock to 1.5 before hehe man it was fast

i have a 34
Old Jun 2, 2005 | 04:55 PM
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How about a VF35? or 39?
Old Jun 2, 2005 | 08:05 PM
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i love my 34..couldnt compare it to anything, but it has great topend for sure
Old Jun 21, 2005 | 09:51 PM
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Originally Posted by Imprezer
Stock turbo can be boosted to 1.5 bar, but it is not efficient there at all. Just a bunch of hot air.

I would go with a 34. 22 is ok too, but not 23. 23 is too small.
thats weird that u say its " 2 small" this is the turbo that i would go with , and it will easily make as much power as the vf34 with minimal, but faster spool time.
Old Jun 22, 2005 | 06:57 AM
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Originally Posted by Skatemur
thats weird that u say its " 2 small" this is the turbo that i would go with , and it will easily make as much power as the vf34 with minimal, but faster spool time.
a 34 is capable of slightly higher power output than a 23.

i have a 23 and am very pleased with it.
Old Jun 24, 2005 | 02:16 PM
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I drove my buddies wrx with a vf22 it really comes alive around 3500 and pulls hard
daily driven 18psi with a vf34 you will come on at 3000 but drop off sooner.
Old Nov 23, 2005 | 07:32 AM
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maybe I have a VF23 in my car then. I got it tuned yesterday and it made less peak power but it made more torque at lower rpms (that is what Shiv told me). I have the plots but no floppy drive to put it on my comp. If I get a hold of another PC I will post them.
Old Nov 26, 2005 | 01:24 AM
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I have a VF-34 that was ported and polished by Deadbolt Industries, and ceramic coated, it spooled quicker and made good power. From what I have seen and read VF-22 is just laggy and un-responsive. I have not heard much about the VF-23.

My vote is definatly for the VF-34. Port polish and ceramic coat and you will be good as gold !

Austin
Old Nov 26, 2005 | 06:04 AM
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Originally Posted by WRX Rush
From what I have seen and read VF-22 is just laggy and un-responsive.
the 22 can make an honest 400chp though. no other ihi has the compressor that can efficiently go >20psi. the #1 reason to buy a 22 though has got to be the price per hp.
Old Nov 29, 2005 | 10:59 AM
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do you guys have the site for the place that ports and polish the vf34?
Old Nov 29, 2005 | 01:49 PM
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http://www.deadboltspeed.com/ is the place I got mine done. I had the exhaust side ported and polished, intake ported and polished and both sides ceramic coated. Shiv from Vishnu said that my spool time was down and power was up a little bit from the normal VF-34 setup. Definatly get the ceramic coating due to the fact that subaru's have their turbo side right under the intercooler, so as much heat resistance you can get is great.

Cheers,
Austin




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