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Old 10-02-2007, 01:41 AM   #1
jacktheripper
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Default vf 34 vs big evo 3 16g

i have a 02 wrx and i am throwing a new turbo into it, i will have all the supporting modds i just need to know which would be better for my car. any advice, and the price isnt a problem at this point
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Old 10-02-2007, 07:06 AM   #2
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Price WILL be a problem when you pooch your tranny.

This topic has been covered DOZENS of times. Search for "VF39" and "16G"
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Old 10-02-2007, 08:43 AM   #3
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The 39 will be cheaper, but the 16 will be more aggressive but it will cost you.
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Old 10-02-2007, 10:33 AM   #4
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Except that he said vf34.

From what I've read, the spool up on the big 16g is almost 18g-like without the bigger top end. I personally would buy the 34 for spool and good power, or skip to the 18g.
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Old 10-02-2007, 11:21 AM   #5
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What are you using for EM? If you have an Accessport, I recommend the VF34 b/c then you can use a free OTS map.
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Old 10-02-2007, 11:45 AM   #6
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like the other guys said 34 will get you the quicker spool and low to mid range power, the 16 still has good spool, is aggressive and get you a lil more top end
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Old 10-02-2007, 01:45 PM   #7
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I just went through the same research and considerations.

I went with the EVO III for a couple of reasons. It was a close call though. The VF34 is a nice turbo for the sub-'06 wrx's

Here was my reasoning:
1. I am less likely to now upgrade my turbo
2. Better top end than the VF34 (some say that's debatable)
3. It can be rebuilt

The other turbo I was considering was an 18g but I wanted a little quicker spool and this turbo suited my needs a little better.

Every car is different, different dynos, different tunes - you know that drill...
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Old 10-02-2007, 03:13 PM   #8
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I run a vf34 and its perfect for street driving. Fast spool up with pro tune and good top end power. The vf34 is definatly a good choice. PM me if you want other info etc...
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Old 10-02-2007, 03:52 PM   #9
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The rebuildable/upgradable aspect of an MHI turbo is extra nice. If you want more power just ship it back and have an 18g wheel put on there, or a 20g if you are really crazy. Plus a rebuild kit is only $120 or so, if you kill it.
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Old 10-02-2007, 04:08 PM   #10
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I'm loving my VF34 with Prodrive solenoid and tune by Ed at Eq Tuning.

Very nice!
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Old 10-02-2007, 04:47 PM   #11
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from everything I have read, (almost) nobody rebuilds their MHI turbos. They sell them and buy a replacement. Also, very few of these turbos fail if properly oiled from the start, so that's not much of an issue either.

Vf34's are def more proven than 16Gs in the Subaru world, and many tuners are far more familiar with them. I still think the type of EM is important with the free VF34 AP maps.
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Old 10-02-2007, 04:53 PM   #12
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they're both nice. flip a coin.
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Old 10-02-2007, 04:58 PM   #13
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^ agreed. Or get the cheaper and use the leftover $ for more mods. Price may not be an issue but you can never have enough $ for modding.
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Old 10-02-2007, 05:00 PM   #14
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the VF34 is garbage.... the 16g is soooooooooooooooooo much better of a turbo, it can push 25psi, it can make over 350whp (on a 2.5ltr, but can brake 300whp on a bugeye), it holds boost better to redline, it can be rebuilt, it can be upgraded internally....

dont waste your money on IHI garbage, do it right the first time... and btw, the 16g spools just a bit slower than the vf34 on the 2.0... i had a vf30 on my old bugeye which is basically the same turbo and absolutely hated it... trust me, get the 16g
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Old 10-02-2007, 05:03 PM   #15
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Quote:
Originally Posted by All4bSpinnin View Post
the VF34 is garbage.... the 16g is soooooooooooooooooo much better of a turbo, it can push 25psi, it can make over 350whp, it holds boost better to redline, it can be rebuilt, it can be upgraded internally....

dont waste your money on IHI garbage
Your statements are foolish. The VF34 is a very reliable and capable turbo. Members have made a lot of power out of them and ran some very fast 1/4 times. Also, Subaru doesn't use IHI turbos on their stock cars b/c they are garbage.
For every 16G plot from a 2.0L EJ engine you produce, there are 5 equal or better VF34/30/39 ones on NASIOC.
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Old 10-02-2007, 11:50 PM   #16
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Quote:
Originally Posted by WRXShawn View Post
Your statements are foolish. The VF34 is a very reliable and capable turbo. Members have made a lot of power out of them and ran some very fast 1/4 times. Also, Subaru doesn't use IHI turbos on their stock cars b/c they are garbage.
For every 16G plot from a 2.0L EJ engine you produce, there are 5 equal or better VF34/30/39 ones on NASIOC.
I agree with all4bspinnin.. on that the 16g is a better turbo than the 34. the 16g just makes so much more power + topend. we've all seen the comparison pics between the VF39 and 16G right.. and as long as your upgrading you might as well go bigger.. for not too much more lag. I think a lot of people here are stuck on IHI hype b/c they come stock on Subaru's...
Oh yeah I think you got it confused... Subaru does use IHI turbos stock.. the VF39 on the STi.. just to name one...
A 16G'd WRX will own a VF34'd WRX...
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Old 10-03-2007, 12:16 AM   #17
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Quote:
Originally Posted by pooster.online View Post
Oh yeah I think you got it confused... Subaru does use IHI turbos stock.. the VF39 on the STi.. just to name one...
*head through window*

"i think he was being sarcastic and meant that IHI makes very reliable turbos and that is why subaru uses them as stock components"

*leaves said window*
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Old 10-03-2007, 01:06 AM   #18
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lol, BINGO

edit: Also note that the stock turbo on the WRX, Forester, etc.. is a mitsubishi turbo so its not like IHI has exclusive contracts with Subaru. The VF30/34/39/... have been used because of their performance and reliability. Few can deny that stock Subaru intake components are very capable, so I think they know what they are doing. Certainly not garbage.

ps: I don't have an IHI turbo, I run a FPGreen which is a mitsu/garret hybrid.

Last edited by WRXShawn; 10-03-2007 at 01:20 AM.
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Old 10-03-2007, 08:46 AM   #19
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alright thanks alot guys, its a tough call but i went with the evo III 16g. and to answer the guys question above im running cobb stg 3
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Old 10-03-2007, 09:09 AM   #20
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another question, because im gong to be running the bigger 16g i dont think that pinks are going to be enough, any recommendations on what i should use...or any idea how modding the stock injectors would work for me?
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Old 10-03-2007, 09:40 AM   #21
WRXShawn
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get Deatschwerks injectors. 650cc or 750cc for extra clearance.
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Old 10-03-2007, 05:50 PM   #22
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STi's used to have 16g's. I believe version 5 or 6 used a 16g turbo with a 90* elbow.
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Old 10-03-2007, 08:27 PM   #23
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Quote:
Originally Posted by sharkmonkey View Post
Except that he said vf34.

From what I've read, the spool up on the big 16g is almost 18g-like without the bigger top end. I personally would buy the 34 for spool and good power, or skip to the 18g.
Except the 34 is more expensive than the 16g.
I was simply letting him know that the 39 is also a good choice.
The VF30/34/39 are all basically the same and will give you the same results. However the 34 spools quicker.
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Old 10-03-2007, 08:28 PM   #24
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Quote:
Originally Posted by WRXShawn View Post
lol, BINGO

edit: Also note that the stock turbo on the WRX, Forester, etc.. is a mitsubishi turbo so its not like IHI has exclusive contracts with Subaru. The VF30/34/39/... have been used because of their performance and reliability. Few can deny that stock Subaru intake components are very capable, so I think they know what they are doing. Certainly not garbage.

ps: I don't have an IHI turbo, I run a FPGreen which is a mitsu/garret hybrid.
And since your so smart why dont you tell us why you took a mitsu housing over the VF34!?!??!

testing has proved the 16g is a much better all around turbo... the ONLY and i mean ONLY advantage the vf34 has is maybe price...

trust us dood, i have had a bugeye with a vf30.. its the basically the same thing as the 34 with a minor difference... dont let the guy who has absolutely no experience with this turbo effect your decision... he's only quoted what he's read on this forum and he's just arguing my point because he has nothing else better to do...

get yourself the 16g, and i promise you'll make more power, have a more reliable turbo, and you'll hold more boost to redline... trust me, do it right the first time

if you really want to get a garbage IHI i'll sell you my VF39 off my sti...
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Old 10-03-2007, 08:37 PM   #25
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All4bspiinin, I am sure he is not saying the the 16g is good, but to say that it is way better and yada yada, is not true, the HP difference between the 2 when properly tuned is not all that much.
The options are there, but really, I would prefer a 18g to the 16g, why, because the differnce is too close for me to spend that money. The 39 is cheap and gives damn good power. 300whp is achievable at about 20 or so psi with supporting mods, same mods and boost level on the 16g may give you about 20 more. but because it flows more, it can take more boost, but to the detriment of the engine. the lower the boost level, the better for your engine.
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