Boost droping on VL turbo

[SeD]

heya guys...

my friend owns a VL turbo and is having some problems with his turb

he says his boost drops from 15 to 5!?!

could that have sumfing to do with the cooler?? or turbo?

any advice apreciated

[turbomad]

Mine used to drop a little too but never 10psi, get some more details of exhaust, intercooler, boost control etc...and we can have a better diagnosis.

I read somewhere the wastegate opening and the exhaust wheel on the VL's are small and can benefit from being opened up a little, so at 15psi he would have alot of back pressure in the manifold which would literally push open the wastgate and hence the drop in boost, I would suggest not running more than 12psi and see if that's any better.

[qikr33]

i think he may have a problem with wastegate actuator or he has a leak somewhere in the piping and it is only leaking after 5 psi .Also could be a leaking vacuume hose somewhere.

[nitemare5]

he has standard exhaust, using a turbosmart bleeder, and a huge truck cooler (dimensions around 900x400x40). From what i saw of his car, the intercooler seems damaged and is leaking.

[SeD]

cheers jay

was thinking it was the cooler.. (piece of shit truck shit)

why 10psi tho?

[turbomad]

Standard exhaust on a VL turbo, he must be the only one left in Aus, that would explain why he can't hold boost though, can't feed the engine boost if the gas's can't get out.

[SeD]

any sugestions on how this can b fixed for minimum dosh and hasle

[Guest INASNT]

he has standard exhaust, using a turbosmart bleeder, and a huge truck cooler (dimensions around 900x400x40). From what i saw of his car, the intercooler seems damaged and is leaking.

bahhhh!!!

would a vl turbo owner do it any other way?

[turbomad]

Get rid of the truck intercooler and run 10psi without intercooling and I bet that it will run alot better than his current setup. I ran 13.6 in a Calais with just 2.5"exhaust, tiny AVO intercooler and 12psi.

[nitemare5]

haha yeah you're right