Still trying to find why my car wont make full boost I have now stumbled across this:



Its a VF23 turbo. How bad would this affect the boost level in the car and what should I do about it?

 

I have a vf24 turbo which i removed when i took my engine out and was hoping to sell for funding towards other parts and i have the same as you. I have two nicks out of my impeller but i never had any running problems, boost (1.4 bar i think) was fine and was running around 320/300 on my type r mapped by JGM and he said it pulled well. I'll try and get some pics up at some point. A bit gutted as i was hoping to sell the turbo.

 

Yeah I must say I'm not convinced this is the problem I'm searching for.

 

In my view yes is problem matey...


Jura

 

Yes is A problem or yes is THE problem though?

 

A bit concerning as to where the broken bit went? Just hope it's stuck in the intercooler and not lurking too close to the inlet manifold!

JohnD

 

http://www.hipermath.com/engines/turbo_size

At 30000 RPM I don't think the chip will reduce boost to any great extent......


Shaun

 

I've never had a problem with boost and mine is similar

 

Mines worse than phil.s turbo

 

it is likley it is the issue, the fan wont be as efficeint with damage to the vanes

 

Oh yes looks worst if anything. Is VF24 a bigger turbo then? Just wondering how you can make 1.4 bat when mine wont barely go over 0.8 on wot.

 

Here are my RR graphs





On the road it seemed to hold about 1.4 bar but tailed off slightly at higher revs but its difficult to keep an eye on the gauge all the time.
The summer before mapping i fitted a silcone inlet pipe and ported my headers and upipe and i first noticed that there was one nick in the blade then.

 

Ignore that other line in the 1st graph just after 5000 rpm as i think it maybe a nad hair that may of dropped off me

 

Just removed mine and it had a light metallic rattle. Gave it a shake and little bits of wire were falling out the exhaust side??? Reckon it might be mig wire. the guy before I had it said he had his headers welded so I recon its got thrown up into the turbo. Not looking good for the poor old thing all in all. If I shake it right it causes the turbine to go a bit stiffer. Rebuild on the cards me thinks.

 

i think vf turbos cannot be rebuilt but i may be wrong

 

Bugger. Not sure what to do now then

 

Im no expert on turbos but the lack of balance will effect boost a bit,the turbo tying up would be the bigger worry.

 

Im not 100% but i think ive seen vfs listed on turbo rebuild sites?

 

OK check this out...

I have found the boost problem:





Big **** off piece of scrap metal stuck in the exhause housing, theres my boost problem!! No damage to the turbine though. Question now is do I put it back together with the bust comp wheel or not??

 

The compressor wheel must be well unbalanced and bearings will be taking extra strain. Surely life will be reduced and only a matter of time before a bigger failure?

Anders

 

Have you any idea what the bit of metal is or where it could of come from? I may strip mine down to see if i can find anything

 

The guy I bought it off said he had his headers welded because they split. They then split again so he changed them. I reckon this is the aftermath of the welding. Whoever did it has made this mess hence the mig wire also falling out of it.

 

Turbo dynamics can rebuild your turbo,but in my opinion is not worth,because £400 for rebuild 10-15 year turbo is waste of money..



Jura

 

Whats my options then? Dont wanna spend a fortune.

 

If you buy used VF23 is again risk,on older VF you must run OEM recirc or DV due older VF are very fragile,and trust some sellers is not very wise(i brought mine and later we are found,turbo is fcked)

You have several options,like buy VF35,VF30,VF34 but if you buy one from this turbos you will need remap as well...

Good luck matey


Jura

 

Bugger. Gotta find VF23 then as its the stock (unmappable) ECU

 

You could buy a later vf turbo as suggested above and you could still have it fail if something makes it into the compressor housing . If you look around, there are still a few decent older vf23/28's out there,going for 1/3 of the price of a vf34 .

http://cgi.ebay.co.uk/SUBARU-IMPREZA...item415997c4e7

The one above imho is a bit pricey ,but try offering them £220 - £250 ,as most of the stuff i have bought off them in the past has been excellent

 

I see these chips all the time on brand new turbos I fit to trucks,

They are normally made when produced by the manufacturer to balance the impellors to prevent vibration and bearing failure

However it is on big turbos fitted to 7.1lt straight-6 diesel engines!!!