Hi guys, I'm thinking of upgrading my standard turbo in my 2.0 WRX bugeye.

Eventually, i'll be looking at getting around 320 - 350bhp. I'm looking at the VF34 or VF35 turbos but don't know which one would be better. What do you guys think? Are there any pros and cons to either? or is there any other turbo i should be looking at?

Thanks.

 

The VF43 off the STi 9 can be bought quite cheaply compared to others and is worth considering.

 

Also worth considering a TD05-16g.

Cheaper and quicker.

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are these direct bolt ons for my car?

 

TD05-16g is off the older cars and comes as 90deg entry. You can pick them up quite cheap and buy a front entry cover for them.

 

VF34/35 is direct fit

 

The 35 is slightly faster spooling turbo but will not produce as much top end as the 34.

So it's Horses for course's really !! I loved my Vf35 on my wrx it made 320 bhp and 405nm of torque at 1.25 it made for a cracking drive on the road.

 

i'm liking the sound of this td05 16g now. any info on this turbo?

 

What info do you need?

It's cheap.

It's fast.

And will likely put your gearbox to sleep if you turn the boost up

TD05-16g + Headers @1.5bar =

There is always a fair few knocking around secondhand.

 

SUBARU IMPREZA TURBOCHARGER TD05 16G on eBay, also, Performance Tuning Parts, Car Tuning Styling, Cars, Parts Vehicles (end time 19-Sep-08 19:15:00 BST)

 

should be lots on there...

 

VF34 spools faster as its a roller(ball) bearing. I had a VF35, was ok but always regretted not going for the 34.

always could go td05 18g and not have the boost as high. you will always want more power in the future and you will have a turbo capable of 380 bhp with supporting mods. but there will be extra lag.

 

I vote for a td05 -18g gives you scope to upgrade in the future should you need too.
If you are on a budget then a 16g will surfice

 

Although the VF34 is a roller bearing turbo it doesn't spool as fast as the normal bearing Vf35 as the VF 35 is fitted with a much smaller exhaust housing then the Vf34.

 

Do you want driveability or rolling road figures?

As said just above the VF35 is faster spooling and was great on my car, unless you compared all of them back to back you wont regret either of them but my advise would be to go for the VF35 first as I prefered little to no lag

Next choise would be the VF34 and then the TD05.

 

it's for driveability. What do you mean by lag (i'm quite new this sorry)

At the moment i am running a decat but no remap, so when i get my turbo, i will be doing a remap on it to. would i feel a big difference?

 

My 18G, AVCR boost controller (you can set boost to also save fuel when required), PSi3 ecu monitor for the same and Ecutek original my53 sti ECU (mapped for the items here) will be up for sale. I will be looking at about £1100 for the lot and my car was doing 375bhp on a warm day on vPower only. The mid range torque for the 18G is quite a big difference to the VF35. Basically kicks in around mid 3000 and does not stop to redline. So you get pushed back in seat from 3500 - 7200.

These won't be for sale until about end of Oct I will be at Zen Performance to change over to my new setup. So anyone who wants to see it action and working could come then if they were interested in the sale. They could drive (or raather be a passenger) in the car with these items in and see for themselves (only serious buyers with insurance). I guarantee, you will want to buy it there and then.

 

ditto!!

i got one of these from ebay for £300 in about feb 2007. went onto my 03wrx (uk) and a great kick bit laggy but then it was only a wrx only mods were panel filter, 3" turbo exhaust system and ecutek which got 302bhp on 1.0 or 1.1 boost cant quite remember which.
nice whistling noise from the turbo ;-)

 

It's the time spent waiting for the turbo to kick in.

The Andy Forrest TD04 hybrid seems to get good reviews on here, that might be worth considering?

 

I had a vf35 and switched to the vf34..The spool is later on the 34 unit but carries on delivering power further up the rev range
My car feels much better with the 34 than the 35

 

There really isn't that much difference between the two: differences in supporting mods and between individual cars amount to more. 35 spools a bit sooner, 34 capable of a bit more top end. My 35 makes 338bhp and a chunky 343ft lbs. Tidgy, who has a very similar set up to me cracked 340bhp, but got less torque. Both very good turbos for the road, however, the VF35 can usually be had significantly cheaper and is thus the one to go for.

Ns04

 

I found that the VF35 started to tail off c5500 - 6000 rpm but the 18g just spins the needle round right to the redline....

 

I have a VF35 on my Bugeye Wrx and it makes 326bhp. The 35 does spool up quick but it does start to tail off at the top end, but I usually change gear at 6k max so it makes no difference to me.

 

All this talk of lag between the VF34 and VF35 is kind of pointless.
it will be a virtually unnoticeable difference. The VF34 is a stonking turbo. Quick spool up and reasonable top end power. A far better choice than the 35. I can't really comment on the 16/18G as I have had no actual experience with them. I would definately recommend the VF34 though.

I had one on my RB5 which made circa 350bhp on a built engine with some additional bolt ons.

 

I swapped from a Vf35 to a Td05-18g and the latter made me smile alot more.

 

agreed just based on price alone the vf35 makes it the better buy as the turbo's are so near each other in spec.

Trust me the mid range torque on the 18G is chalk and cheese to the vf35. You get a big pull that just keeps going as if it will go beyond the redline.

If I were you and knowing what I now know I would get the 18G but you will require more mods if you want lots more power. This will easily do 350bhp and go on to upto 30- 40bhp more with the right mods..... but the biggest thing about it is the mid range (the overtaking range) is just real good and you don't need to think about changing gears whilst mid way through overtaking.

Also note my mpg is circa 30mpg+ when required and can get over 320 miles from a tank!!! Thats at 375bhp!!!

 

To clairfy: I was comparing the VF35 and VF34 mate, not the 18G sorry for the confusion!

The 18G is a step up in terms of output from both of the above. I'd have one....were it not likely to spell the end of my gearbox!

Ns04

 

It hasn't killed my gearbox 3 years on as a daily runner incl. trackdays.





<----- ignore this picture - actually blobeyed wagon.

 

if i were to go for the 18g, would i need other mods to support it such as gear box etc...? I'm not willing to go into spending lots just yet...

 

Yes, would recommend:

• Bigger Injectors
• Intercooler (STi 8 TMIC or FMIC)
• Uprated Clutch
• Headers
• Air filter/induction
• Remap

Am sure I've missed a few bits...

Gearbox will be on borrowed time IMHO.

Best to set out a budget.