Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

vf34 vs big 16g

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Old Sep 13, 2007 | 09:03 PM
  #1  
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vf34 vs big 16g

Like the title says guys, PLEASE PLEASE i need your honest opinion or even better: an educated decision.....
i have almost everything ready to install when i hear about a great deal on a big 16g turbo.

which do you think is:

overall better?
more dependable?
spools quicker?
better topend/midrange?
and is overall best for my 2.5L running on **** poor 91oct?

please guys, i need opinions asap.
TIA
-Vlad
Old Sep 13, 2007 | 10:32 PM
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18g ftw. or VF22
Old Sep 13, 2007 | 10:41 PM
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c'mon man, im comparing 16g 7cm vs vf34 .......NOT any others....ive been searching for like 3 hours for a good educated answer or opinion but everyone is on the 18g bandwagon...i know its better and hella nice, but i only have money/opportunity to get one of these two, and 18g isnt an option...now that we have that out of the way, which one?
Old Sep 13, 2007 | 10:43 PM
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i heard that 16g spools very good similar to vf34 and most importantly: holds boost better at high rpm netting better topend...is this true?
also that it flows more and is rebuildable? doesnt that make it better?
im really curious which one would get me better performance numbers on ****ty 91oct fuel.....im a big fan of topend, so if it holds boost better up top thats a big plus....any ideas?
Old Sep 13, 2007 | 10:57 PM
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i had a big 16g on my 1 gen talon and it spool very well. my next upgrade for my wrx is big 16g.
Old Sep 13, 2007 | 11:13 PM
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nice nice....
anyone know how it compares to vf34?
im 50/50 split between ppl saying vf34 nets same number for cheaper, and people saying 16g nets bigger numbers and holds boost much better in high rpm
which would gain more power?
Old Sep 13, 2007 | 11:49 PM
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for a 2.5l go with at least a 18g and 700cc injectors
Old Sep 14, 2007 | 12:24 AM
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Is this for your 05 or 07 wrx?
Old Sep 14, 2007 | 01:41 AM
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common turbo on the 2.0L is a vf34. Very good IMO on the 2.0L. But if its for your 2.5L wrx, then Dont go with any, go with 18G atleast
Old Sep 14, 2007 | 03:14 AM
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if ur a 2.0l(whichur not) go for vf34

if ur a 2.5l, go for 16g. but i'd suggest you to go 18g or vf22.

Old Sep 14, 2007 | 07:26 AM
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VF22 or 20G for a 2.5.
VF30 for a 2.0.

Why pay hundreds more for a 34?
Old Sep 14, 2007 | 07:46 AM
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well i got a great deal on a vf34, and also found an awesome deal on a 16g, basically 100 bucks more...this is for my 2.5L, and i know 18g/vf22/etc would be better but these two are all i have to work with at the moment, and for quite some time actually.

oh and thanx for your guy's replies...
Old Sep 14, 2007 | 08:15 AM
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Great buy does not equal great performance.
Old Sep 14, 2007 | 08:33 AM
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I second that
If your car is still running and the stock turbo is not broken, chug that thing aroung for a few more months and save for the turbo you really want
don't settle on a "great deal" and regret later
my 2cents
Old Sep 14, 2007 | 06:03 PM
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ok, so the deal on the 16g fell though, wich is just as well because i wasnt very comfortable buying it after hearing that it wouldnt provide significantly more performance for the price difference over the vf34....
so for now my plans to run the vf34 are still a go, (since i got a great deal on one) and just like you guys said ill be driving around with this setup till i can get something larger/more suitable for my engine like the 18g....
btw, how do the vf22 and 18g compare?
i know both flow more than the 16g/vf34, but are they similar like the other two as well?
im curious..



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