Maximum boost on a vf34
22 June 2010, 10:53 PM
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Maximum boost on a vf34
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. 
Last edited by Corey; 22 June 2010 at 10:57 PM.
31 March 2011, 07:11 PM
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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
Many thanks
Corey
Last edited by Corey; 31 March 2011 at 07:15 PM.
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31 March 2011, 07:40 PM
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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
31 March 2011, 07:50 PM
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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
31 March 2011, 08:05 PM
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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.
31 March 2011, 09:47 PM
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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.
31 March 2011, 11:33 PM
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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
31 March 2011, 11:49 PM
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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 :-\
01 April 2011, 08:31 PM
#19
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.
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.
01 April 2011, 09:29 PM
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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
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
02 April 2011, 09:11 AM
#21
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.
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.
02 April 2011, 11:37 AM
#22
If you PM me, I can reply with the chap's contact details (I know he won't mind)...
Last edited by joz8968; 02 April 2011 at 11:45 AM.
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