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Old 12-03-2008, 02:55 AM   #1
Cortez
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Default VF34 setup advice for my 02 WRX

so heres my deal: i have an 02 wrx that i have been gathering parts for and sorting out exactly how big i want to go. I have a TurboXS UTEC, Perrin electronic boost control solenoid, K&N typhoon intake, Turboxs turboback, and i have decided on picking up a VF34 for the turbo.
so here are my questions:

1) obviously with the new turbo i will need to upgrade my injectors and fuel pump, i am planning to go with a walboro 255lph for the pump, and would sti pinks be sufficient for injectors?

2) upgrading the intercooler will also be on the list, will an STI top mount be sufficient if this is the full extent of my mods? or should i consider a front mount?

3) finally.... what kind of power am i looking at with a full pro-tune and dyno pull with pat richard at RocketRally 300 awhp?

i would appreciate the feedback!
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Old 12-03-2008, 03:06 AM   #2
DocLiv
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Yes, STi pinks and tmic will be fine. You don't need a front mount. I have a VF34, pinks, TurboXS tmic, and Cobb AP v.1. I put down 284 awhp on a superflow dyno without a pro tune.
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Old 12-03-2008, 03:07 AM   #3
Cortez
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just what i wanted to hear, so 300 at the wheels should be achieveable with a protune i would think. what are you running for PSI
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Old 12-03-2008, 03:26 AM   #4
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19 psi. My dyno sheet is in the sticky on pg.13. One of these days I'll get pro tune.
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Old 12-03-2008, 03:51 AM   #5
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The pinks will be fine, but for not much more money you can get some 650s. Like I said this isnt neccasary but if your doing the install yourself it will be worth it in the long run. Not only will you have more head room but if you ever wanted to upgrade to a evo III 16g or such it would be alot easier. The green brackets of death are a big pain on the injector install and I wish that I had gone bigger.

Like stated above the front mount isnt needed. A sti top mount will do fine.

For the tune itself... dont get caught up on the number 300. Would it be nice, of course but at the same time its not as important as getting a go smooth graph.
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Old 12-03-2008, 04:03 AM   #6
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sounds like a perfect auto cross car.....300whp might be a stretch..race gas like c16 or e85(not race gas) would also help get close to your goal......look for around 270whp but some good wtq with a 34.....good build like sounds like a nice ride
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Old 12-03-2008, 11:11 AM   #7
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yeah 300 will be pushing it. the vf34 is ~ a 35lb/min turbo IIRC, so you will be a little short of 300whp. get bigger injectors than the pinks, they will work but you will be pushing high duty cycles at high rpm and boost and wont have room for an upgrade.
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Old 12-03-2008, 11:17 AM   #8
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Im running one on my car with a fmic, pinks, etc. No numbers tho, road tuned.

300whp is a stretch.
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Old 12-03-2008, 11:24 AM   #9
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for injectors, IMO just go get them cut and flowtested for 200.00 at a speed shop. YOu get more bang for the buck pluss they will be 850cc lol
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Old 12-03-2008, 01:55 PM   #10
brendan_mac
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Rocket's Dyno will show you ~265 whp with that setup.
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Old 12-03-2008, 02:25 PM   #11
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Just curious, why are you worrying about the whp? In terms of HP at the crank, the various setups are pretty much tried and true and regardless of what whp you put down on the dyno, provided your motor's healthy you have a pretty darn good estimate of what it is actually making.

A basic vf3x setup with top mount and injectors is going to get you 340-360hp depending on your exhaust setup and just variance between cars and runs, and with all supporting mods (fmic, inlet, intake, headers, tgc, ewg, etc.) pushing *near* 400
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Old 12-03-2008, 02:32 PM   #12
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all that will work. I might skip the intake and put that money towards a tranny fund. How many miles are on the car? have you done timing belt/water pump/tensioner?
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Old 12-03-2008, 02:34 PM   #13
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ps. you should put this in the 2.0 liter forum instead of ppb
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Old 12-03-2008, 02:36 PM   #14
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Full exhaust: turboxs 4" downpipe, 3"midpipe, injen muffler.
Headers and uppipe: Fujitsubo 4-2-1 equal length headers and uppipe combo
Turbo: vf34 @ 19psi with 650 PE injectors, walbro 250 fuel pump, and AP.
Intercooler: MRT FMIC with a greddy bov and flange welded on, injen short ram intake.

made 305 whp tuned by Jorge and P and L Motorsports

It was a pretty agressive tune though.
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Old 12-03-2008, 02:36 PM   #15
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I'm running a VF34 and putting down 306awhp.

It's not a stretch.....it's all in the tune and the condition of your motor.
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Old 12-03-2008, 03:34 PM   #16
Cortez
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hey thanks for all the input guys, im not really stuck on the 300 whp number, just a nice figure i suppose. the engine in the car is very strong, i got it used from a guy who never modded it and used it as his DD. i got it bone stock and it currently has 100K miles on it, and is going in for the timing belt service before any of this gets installed. I think i will probably go with the STI pinks just because i know i wont be modifying it further before i sell. i plan to keep it for a year or so before i get into an 06 STI. also, one more question, whats the major difference between a VF34 and a VF43? i know they are very similar just wondering if one is a better option. once again, thanks for the input guys!

p.s. as for the tranny fund comment... i fully expect that these mods will lead to bad news in the tranny department, but thats something i am prepared to pay to have fixed when it pops....
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Old 12-03-2008, 03:49 PM   #17
bebesito21
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vf34 is older, ball bearing and came on the japanese sti
vf43 comes on the 07 usdm sti

they are similarly sized and will produce similar numbers
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Old 12-03-2008, 03:50 PM   #18
Cortez
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cool, i didnt think there was much difference. i think im gonna try to get my hands on a low mileage VF43
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Old 12-03-2008, 03:52 PM   #19
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Old 12-03-2008, 03:57 PM   #20
Cortez
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damn, someone took alot of time to break down all the turbos there... so much info on this site, thanks again
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Old 12-03-2008, 03:58 PM   #21
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p.s. if anyone has a walboro 255lph pump, sti TMIC, or injectors to sell PM me!
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Old 12-04-2008, 04:02 AM   #22
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i would go with the vf34 instead of the vf43 but thats my 2 cents!
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Old 12-04-2008, 07:41 AM   #23
DanBelford
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The VF43 I just installed on my 03WRX gave me 311hp and 298ft/lds of torque. Im happy with the results and it was a cheap DD setup for me. If you can find a VF34 for a good price I would go that rout. The turbos are almost identical but the ball bearing in the 34 will be slightly better.
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Old 12-04-2008, 04:04 PM   #24
Cortez
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hmm, something to consider for sure, anyone else have input on 34 over 43 or vice versa? i was thinking the route of the 43 just because it would come off a newer vehicle and therefore would likely have less use on it, but im open to advice
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Old 12-05-2008, 05:49 AM   #25
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Quote:
Originally Posted by Iflysti06 View Post
i would go with the EvoIII 16G instead of the vf34/vf43 but thats my 2 cents!
fixord.

And yes, this thread belongs in the factory 2.0l turbo section, not PPB.
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