Hey guys I got a vf34 from a very helpful member on here a while back and I'm just wanting to know whats the most boost people are/were running. I'm hearing that people are killing the seals with anything over 1.5 bar is this true would I not be able to go higher than this. I'm not running it on a Scoob either. Cheers for any help.

 

Anything over that is pointless. 1.5 bar and I'm assuming its on a VW of sorts will be planty rapid!!

 

Na its for a jdm shopping trolley.

 

That looks nice, any more info/pics?

 

i heard the boost drops off between 350-360bhp, i think thats 1.6 bar but not sure.

 

Gonna bump this up again is there any other vf34's users could give me some feedback I want to run it at 1.6 but abit iffy dont want to kill it pricey bit of kit lol. Done a lot of searching but no definite answers.

Many thanks

Corey

 

Hi there this depend on more factors,but you can run more than 1.5bar on VF34,on Impreza's you will be limited by your ECU,because standard ECU have limits,some people run around 23-24psi on VF34..

Jura

 

Cool thanks dude I have everything I need to up the boost just want to make sure I can without killing it. 24psi sounds sweet but could I take it to that and would it be still efficient at that also? Cheers mucho appreciated

 

Hi matey have look at this thread,where one guy run(from USA) 23psi on VF34,probably best will be if you find compressor map of VF34 somewhere on the net...
http://forum.ecutek.com/topic.asp?TOPIC_ID=1256

If will be effective beyond the 1.6-1.7Bar this don't know on my wagon i make on 1.5bar 350bhp on standard OE headers and decated up pipe.


Jura

 

Cool nice one dude I'll have a look at that. Seems a very gradual turbo does'nt come in with a kick as such very deceptive imo you dont think its pulling really hard until you look at the clocks lol. Full boost for me is 4600 rpm lol its a pretty big turbo for a 1300cc.

 

Hi there this depend on tuner,on mine VF34 has begin spool at 2.6k rpm,but hold the power all the way through.
On 1.3 engine i would suggest TD04 which will make good and drivable car with good power(i run Punto 1.4 GT with TD04)



Jura

 

Na td04 is to small looking to break 300 which should be possible with this td04 is only good for 260/70. TD04 is a good turbo for these but just not what I'm looking for. Having some det problems at the moment hopefully get them sorted. Thanks for your help mate really appreciate it.

 

What car is that?

 

Its a Toyota Starlet dude.

 

lol thanks got passed around the pub tonight trying to figure out what it is... had all sorts of comments including Pug 307 :O least you cleared that one up for us

 

they are rapid and a big powered one would give an impreza a run for its money!

 

Sure would, there's not a lot to them

 

i used to have a gt turbo at 203 with a tdo4 on and it surprised a lot of cars do not under estimate them! oh and they handle like a go kart there just a bit bigger than a 106 :-\

 

The VF34 is capable of 360 bhp on a 2 litre Subaru. That does not mean it will do 360 bhp but with all supporting mods it is capable of around that figure.
I don't know anything about seals being blown out at high boost and think you might have been in a pub or on the internet to get that crap.
High boost is not the be all and end all of getting power. If you put some effort in to it you might be able to find a compressor map which will show where the turbo is efficient. From my experience I would guess the turbo is efficient at 1.5 bar but if you go any higher than perhaps 1.6 bar all you will be doing is making the turbo work harder, creating a lot of heat and no additional power. That doesn't mean to say you cannot run a VF34 at 1.7 bar or even 1.8 bar. The only thing is there is no point and I suspect you will find that somewhere around about 1.5 to 1.6 is optimum. This is why you need a good mapper because he will see what is happening at various boost levels and will determine the best boost for your turbo on your car. On the same model car with slightly different modifications, particularly the headers, uppipe and exhaust the most efficient boost to operate at will change from car to car.

 

Cheers dude I'm not expecting 360 out of a 1300cc I'm just going by figures of vf35's on same car making 300+ so should have a small bit more with a 34. As for the seals I've being told dont run a ball bearing vf over 1.4 or it will **** iself bearings included.

I did'nt take it seriously tbh as I've looked into it a good bit and its running a bit more than 1.4 at the moment I just wanted some reassurance from people running these and at what kind of levels as its a pricey piece of kit but I do want to get the most out of it without being afraid it will die. I really appreciate your response dude cant find anything useful on other forums so I said I'd come on here and get proper info.

Many thanks

Corey

 

Your performance on a 1300cc will be greatly degraded over that on a 2 litre running to 7 or 8000 revs. Plenty guys on here will be running VF turbos at 1.5 and 1.6 bar and I guess a few may be running beyond that but possibly in ignorance but it does not appear to cause a failure on the cartridge.
How the turbo will work on your car I do not know but it will be interesting but I think you may find the VF34 is too big for 1300 cc.
Good luck with it and I hope you can push the boundaries of knowledge and performance. Please give us feedback when you have it.

 

Corey, I sold my STi 5's VF28 to a Starlet owner on this site. He went to go on to get it mapped to 302bhp!!! Not sure at what boost target though. On the Impreza, the VF30/29/28 are prob the next closest spooling options after the TD04L, closely followed by the VF35/34 and the TD05H 16g...

If you PM me, I can reply with the chap's contact details (I know he won't mind)...