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New Turbos On, Boost Leak?

IanB

By IanB,
in Engines & Forced Induction

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IanB Veteran

IanB

Posted
Posted

Hi all

I have just replaced everything from my exhaust manifold back and I seem to have a boost leak. I know this is a broad ranging question, but does anyone have any surgestions for common places to check?

I have heard it may have something to do with the adjustable wastegates? The car barley makes boost and dies around 6000 RPM...

:)

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TTT Grand Master

TTT

Posted
Posted

bo you see nothing on the boost side of the gauge even on full throttle.

are the wastegate actuators connected to the wastegate flap?

if not, they will flap open easily under boost like a loose vagina in the wind.

then the exhaust gases will pass through the path of least resistance which will be the wastegate.

Not sure what else would cause NO positive pressure to be made.

TTT Grand Master

TTT

Posted
Posted

could be.

are they NEW as in out of the box? or new as in New to you but are actually off another car.

you could do a test..

Disconnect the wastegate vacuum lines off both turbo's and plug them up.

then "CAREFULLY" go for a drive. make sure you keep your eye on the boost gauge as you give it some accelerator to load it up in gear.

it it builds boost and gets up and boogies, then you know that the turbo's are fine and the wastegates working fine, and that they need to be adjusted.

put all the vacuum lines back as it should be, then adjust the wastegate actuators as required.

it would be easier on the dyno but can be done on the road..

a whole lot of driving, stopping, adjusting, then repeat till it is how you want.

Beer Baron Grand Master

Beer Baron

Posted
Posted

my god I would hate to have to adjust GTR wastegate actuators on the side of the road. I would say without removing a lot of surrounding gear it would be impossible unless your eyes can see through stuff and you have spanners that has a shaft like a bendy straw.

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