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Old 17 October 2011, 03:52 PM
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scooby_rich
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Default vf34 more power??

Hi guys,

Had my classic 2000 plate uk turbo mapped 2 years ago with a full decat afterburner system, uprated fuel pump vf34 turbo quikshift ind kit, the car made 325bhp on optimax ecutec mapped by powerstation, i was wondering what power you guys were getting from the vf34 turbos on classic imprezas? do you think it would be worth while if i put some 550cc injectors and a fmic and had it mapped again? what gains are their to be had..

Thanks for your help guys
Old 17 October 2011, 04:00 PM
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stewart1397
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350/360 out of my vf34
Old 17 October 2011, 04:07 PM
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happydude303
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yeah it would be worth fitting a fmic and some 550cc and you may make the 350 markior near there
Old 17 October 2011, 04:09 PM
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Ryan@Indigo-GT
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I had a VF34 on mine with 440 Injectors, I was running more than 325bhp, but that all comes down to the mapping and supporting mods. The next change for me would have 550 injectors to get the 360bhp mark.
Old 17 October 2011, 04:18 PM
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fingerscooby
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I've just brought a vf34 and was told that 550 injectors would help gain more useable power so I got fine Sti pinks from here along with Sti top mount, 3 port boost valve, Sti up-pipe, sports cat down pipe, walbro fuel pump should see 330-350 hopefully.
Old 17 October 2011, 04:36 PM
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i have a vf35 with 550 braided parellel fuel rails fpr @ 3bar tubular headers full de cat fmic running it all apexi power fc maped at 330 BHP was told that 350 was about all i would get so would a vf34 be a better turbo for me as you guy are talking 360
Old 17 October 2011, 04:41 PM
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scooby_rich
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thanks for the quick replys, yeah i was hoping for around 360bhp, i would go for a bigger turbo but just dont have the funds at the moment, what fmic are good both fittment wise and quality? i have heard of these ones called hybrid any views? als injectors wise do i just need the pink sti ones?

thanks guys
Old 17 October 2011, 04:47 PM
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Ryan@Indigo-GT
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Originally Posted by johnnybon
i have a vf35 with 550 braided parellel fuel rails fpr @ 3bar tubular headers full de cat fmic running it all apexi power fc maped at 330 BHP was told that 350 was about all i would get so would a vf34 be a better turbo for me as you guy are talking 360
The VF34 will give you more top end power, it doesn't tail off as soon as the 35. It's slightly larger than the VF35 but will spool a little bit slower, off the top of my head I'm sure the 35 has a P15 housing where as the 34 is a P18.
Old 17 October 2011, 07:22 PM
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can the vf34 make 360 bhp ? also does the front mount intercooler increase horsepower or is it just more efficient than t/m ?sti top mount good for over 400bhp . i have a vf34 , walbro ,550s etc etc on my 02wrx its going to be mapped at api using ecutek , can i expect over 330bhp ?? also would a fuel pressure reg help get the figures up ??
Old 17 October 2011, 11:13 PM
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Minjeeta
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I was 380 with a hybrid vf34, pinkies, fmic, headers, ecu. Once the ceramic bearings go, its goosed. Can't get replacements. About 5 months out the ej20 before it melted too.. vf35 had identical housings, flanges and actuator - never had that one to bits though so not sure about the internals other than the ball bearings were noisier. Had surge/chatter too when i swapped the engine and turbo unit before it was mapped to 350.

Last edited by Minjeeta; 17 October 2011 at 11:13 PM. Reason: eh
Old 18 October 2011, 01:02 PM
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you need to speak to harvey smith on here he will sort you out a hybrid intercooler and yes they are dam good for th emoney around the 350.oo mark to buy and i have one and many poeple use them on here and can run a lot of hp and they fit well
Old 18 October 2011, 01:22 PM
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The VF34 is not a 350-360 turbo, any car that produces that kind of power with the VF34 is at the top of what it can make.

IMO its a 330-340 turbo at best
Old 18 October 2011, 01:26 PM
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Originally Posted by jayallen
The VF34 is not a 350-360 turbo, any car that produces that kind of power with the VF34 is at the top of what it can make.

IMO its a 330-340 turbo at best
With right spec will make 350-360bhp,i was run on mine 350bhp WRX.

330-340bhp i would say is safe


Jura
Old 18 October 2011, 01:50 PM
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Originally Posted by jayallen
The VF34 is not a 350-360 turbo, any car that produces that kind of power with the VF34 is at the top of what it can make.

IMO its a 330-340 turbo at best
Quite happily makes around 330bhp+ on the S202 (quoted 316bhp standard), mapped on one of those and your looking at 360bhp without issues.
Of course it depends on the car but it is capable of 350/360 without problems.

Tony
Old 18 October 2011, 05:40 PM
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jayallen
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Originally Posted by TonyBurns
Quite happily makes around 330bhp+ on the S202 (quoted 316bhp standard), mapped on one of those and your looking at 360bhp without issues.
Of course it depends on the car but it is capable of 350/360 without problems.

Tony
I never said it can not make those numbers, im saying that by rule of thumb its not a 360bhp turbo....as with all turbos there are exceptions.

My VF34 made 341 on my STI RA
Old 18 October 2011, 06:16 PM
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I have a vf34 going on next month along with.. Sti tmic, denso 550s, walbro, 3 port, k + n panel filter, decat uppipe/downpipe/centre pipe. Being ecuteked at powerstation! Hoping for around 340/340 ish on my 2003 wrx
Old 18 October 2011, 08:16 PM
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My VF23 made 326, VF24 made 334 & VF35 made 352.
Old 18 October 2011, 08:24 PM
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Anger
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Originally Posted by jayallen

My VF34 made 341 on my STI RA
Exactly the same as what mine made on my RA mapped by JGM
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