parteepro

morning scooby lovers i have a vf48 turbo which is standard on a 2008 hatchback, i was told it has a crack near the waste gate valve.

my question is what power issues will i have with the crack, lots of people say it will run fine to 400 bhp with the relevant mods, yet other say not to chance it.
is it worth having the turbo overhauled or not

L.J.F

iTrader: (31)

It's pretty normal for VF turbos to get a crack near the waste gate and will not cause any performance issues.

parteepro

I had the following work done

> Modified Oil Pump
> ACL Race Bearing Kit
> Cambelt
> Genuine Engine Gaskets
> Cosworth 0.78mm Head gaskets
> Cosworth 11mm High Tensile Stud Kit
> Mahle Forged Piston Set
> Mahle Ring Set
> Fluids & Filters
> Bore & Hone
> Air Pump Delete Kit
> Decat Down Pipe
> Exedy Clutch Kit
> Labour
> Running In Map
> Oil & Filter @ 1000 miles
> Carry Out Dyno Run (done)
> Carry Out Compression Test (done)
> Carry Out Leak Down Test (done)
>
Yet it's still only doing 310 bhp........and its been fully remapped

parteepro

what other mods should i be doing in order to get somewhere near 400bhp

peter zippy reid

iTrader: (25)

If its still on running in map it will have restricted boost to play safe

parteepro

its not i had the running in remap taken off and the remapped to its full potential which was a disappointing 310bhp

is it because the mapper wants to air on the side of safe rather than pushing it up more, or am i missing a mod somewhere.......induction kit and turbo inlet hose

peter zippy reid

iTrader: (25)

What boost are you running to get your 310bhp

peter zippy reid

iTrader: (25)

Turbo might be causing low number due to crack what did mapper say

parteepro

i will find out from the mapper, thanks for your input

Dan wrx

iTrader: (2)

Think the main question here is who mapped it??

parteepro

Td racing in warwick and he has a very good reputation

super_ted

iTrader: (30)

No mention of uprated fuel pump Or injectors being used?

parteepro

Sorry forgot to add de-cat was done on standard quad exhaust system, but yep no fuel pump upgrade

peter zippy reid

iTrader: (25)

Seems low unless turbo has a problem

jura11

iTrader: (7)

Hi there

VF range is prone to cracking around the wastegate seal,this can be sorted too,but not sure on the cost there

Depends how big crack is it and if its hold the boost etc.But when you can't make more power with rising boost,then I would suggest get this sorted(I think someone here welded this successfully)

Sometimes more boost doesn't make power and sometimes more boost is needed to make more power,there is perfect balance,I would speak with mapper what he thinks,if he thinks this can cause low bhp numbers,then I would go with his advice

Thanks,Jura

parteepro

The waste gate I presume is a separate part I'm no mechanic, so surely the waste gate part can just be replaced

Infected by sti

iTrader: (6)

No it's part of the housing where the crack will be.

jura11

iTrader: (7)

I've mean this,wastegate port/flap,this usually cracks on the VF range turbo



Thanks,Jura

Bob99

If this is wheel BHP it is not far off as it would be about 380-390 at the flywheel?