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Old 08-07-2006, 12:46 AM   #51
txl146
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02 WRX VF34
Junior Tuned 301whp

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Driving impression after 5 months of driving on VF34 (only 3000 miles!)

- Protune at XX-tuning resulted: 32whp and 35 wtq over OTS map (Cobb stage 2.5)
- Acceleration is slightly faster than stage 2 until 2nd gear, but car really starts to pull away from stage 2 WRX starting 3rd gear and on.
- spool is roughly 400rpm+ slower than TD04.
- My car gets better mileage since turbo is not used as often (slower to spool).
- My driving style has completely changed to accomodate for additional power (60+ whp). I check for engine oil weekly to watch for potential oil starvation before any spirited drive.
- No aggressive launch ever since turbo upgrade.
- No longer afraid of high trap speed cars like Accord V6, stock SRT4, 350Z, S2000 at the track (1/4 mile).
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Old 12-10-2007, 02:12 PM   #52
Fahren
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Quote:
Originally Posted by txl146 View Post

By gently bending the oil hard line, align it and use 14mm bolt to connect to turbo (circled in RED). Be sure to use a washer while putting it back on.


washers on both sides of the hardline?
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Old 12-10-2007, 03:40 PM   #53
txl146
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Junior Tuned 301whp

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IIRC, just on one side....
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Old 01-15-2008, 12:18 AM   #54
txl146
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02 WRX VF34
Junior Tuned 301whp

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Update after 18k miles since the install:

So far everything feels great and car put down similar whp when I went for a retune (same at ~280whp) today.

With german castol oil, car is no longer losing oil, which has been an issue with M1. In my opinion, VF34 is definitely a great turbo for a DD, especially with a custom tune.
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Old 04-18-2008, 11:54 PM   #55
txl146
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bump for people looking to step up to stage 4!

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Old 04-19-2008, 03:03 PM   #56
speedbuggy67
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lol always was a good post and im always looking to go stg 4 my 39 has sat on my shelf for 2yrs already.... One of these days...

Scott
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Old 10-30-2008, 03:23 PM   #57
bolderer
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I'll be replacing my blown vf39 with a vf34 this week. I did the last swap by myself as a total noob and had no problems but writeups like this one were the reason it was so simple. This time I'll at least have a buddy there to hand me tools/beer while I work. Thanks a lot for taking the time to make this write-up.

Edit: BTW, Oil inlet banjo bolt has TWO washers. One on the top, one on the bottom.

Last edited by bolderer; 10-30-2008 at 03:34 PM.
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Old 10-30-2008, 04:32 PM   #58
txl146
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Junior Tuned 301whp

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Good luck with the swap. Thanks.
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Old 11-12-2008, 05:37 PM   #59
wrxtacular
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Just did a VF34/pink injectors swap a few weeks ago (thanks for the write up). I still had a catted uppipe in my stage 2 set up, and I changed that out for an STi uppipe (catless) at the same time as the swap. For me, there wasn't much difference in lag between a stage 2 w/ catted uppipe and VF34 with catless uppipe, but the difference in power is amazing. All did not go well with my swap, so learn from my mistakes:
1) use NEW injector rubber o-rings/gaskets (my pinks were only used for about 1000 miles before I bought them, but I still had problems with a leaky injector)
2) watch out for the TGV sensor! Its a little black sensor that sits between the turbo and the engine, and if you smack it with the turbo or a tool, you will break it (and it is a PITA to replace once you have the turbo back in)
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Old 01-05-2009, 04:00 PM   #60
WRXerist
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Subscribed
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Old 01-05-2009, 06:50 PM   #61
felixk
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awesome write up, got my through my vf39 swap last week. also used his injectors write-up to do those. thanks!
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Old 03-25-2009, 12:42 AM   #62
txl146
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Photobucket placed a monthly limit on bandwidth... photos will re-appear in April again.

Last edited by txl146; 03-25-2009 at 05:30 PM.
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Old 03-25-2009, 02:13 AM   #63
snowlovinrex
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You mean April?
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Old 04-02-2009, 01:26 AM   #64
txl146
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Junior Tuned 301whp

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pictures are finally working!
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Old 04-02-2009, 03:22 PM   #65
AlucardR
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Thanks for your contribution
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Old 07-23-2009, 12:54 AM   #66
txl146
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Junior Tuned 301whp

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One thing I should mention is to use new gaskets when replacing turbo. I think one of my gasket maybe shot after 90k miles (could be any of pre-turbo gaskets).

Will find out soon as I plan to install Grimm speed crossover pipe shortly.

Will do write up on Xover pipe.
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Old 03-03-2010, 01:00 AM   #67
txl146
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Junior Tuned 301whp

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Update after 25k miles since the install of VF34:

Since the install of VF34, I have upgraded STI TMIC to TXS TMIC. Car was retuned after installing TXS TMIC.

Car put down 301whp with VF34 at 16psi. Could have made >20 more hp, but we decided to leave it at moderate 16psi. I think VF34 is a great little turbo for 2.0L WRX.
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Old 03-03-2010, 01:47 PM   #68
PCrowlz
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Really nice writeup. This will come in good use for me someday.
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Old 03-03-2010, 03:19 PM   #69
jstalford
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how many total miles are on your car now?
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Old 03-03-2010, 05:15 PM   #70
txl146
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Junior Tuned 301whp

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Around 95k miles - 25k miles @ >280whp power level with original glass transmission.
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Old 03-03-2010, 05:29 PM   #71
jstalford
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Sweet. I went stage 2 at ~75k and then Added a Grimmspeed 3 port and TurboXS TMIC and protune at ~90k. Doing an inlet/after MAF tube and ported heads/crosspipe soon. This makes me feel better about doing a turbo upgrade soon, with higher miles. I'm at 107k now.
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Old 03-13-2010, 09:44 AM   #72
txl146
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Junior Tuned 301whp

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jstalford, I also had exhaust manifold ported by GS right before Justin started his business.
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Old 06-14-2011, 02:55 PM   #73
Adamthomas625
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Quote:
Originally Posted by txl146
I think I need to get an upgraded turbo inlet hose. When I drove around I could hear this air sucking noise (barely noticeable), which appears to be coming from turbo - turbo inlet hose. When I put in the VF34, I noticed that turbo inlet hose where clamp sits was worn out.

I think stock hose may be worn out or maybe I am mistaken for a noise coming from resonator removal mod since VF34 turbo is sucking more air in. I was planning on getting a turbo inlet hose anyway. It gives me another reason to write up a procedure for turbo inlet hose.
Nice write up. I also found that my inlet hose was very worn out. I have a new one on the way. When it gets here and I put it all back together I will let you know if it starts haha I used your writeup on injector and turbo install. I just hope my injectors don't leak. If they do it will be a Pain to take them out and solve the problem

Last edited by Adamthomas625; 06-14-2011 at 03:12 PM.
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Old 08-12-2011, 12:48 AM   #74
txl146
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Junior Tuned 301whp

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Adamthomas625, how did your install go? I installed Perrin v2 turbo inlet hose and it fit like OEM hose.
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Old 08-12-2011, 08:52 AM   #75
SubieLuvin
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Subscribed. Rocking a pnp vf34 and pinks myself. Love it! Getting money together for grimmspeed exhaust manifold crossover pipe and ewg setup!
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