Another boost problem

[ssn11]

had a look thro the search bit but with no luck so plz help me...
 
leeking boost from some where but only when 2nd turbo kicks in huge noise of air coming out...
 
have twin hybrid turbos, race ported, apex ecu runing at 0.6bar...
 
driving thro the gears every thing works fine and boost is up on the gauge but soon at 2nd turbo comes in at 5g get huge rush of air coming out and lose power..
 
toke the 2nd dump vv off and got a rush of air escaping??? there sealed units so cleaned out with wd40 and all was moving fine. went for spin same prob still, so change vv round with each other still same prob, toke all intercooler pipes of and cheacked for cracks and did all the pipes up tight again still got same prob of leeking boost....
 
there no oil under the car of nasty blue reek out the bk as if a had a blowen turbo
 
new to all this so any help would be ace thanks again
 
regards sean

[shaggy]

I had this problem after i fitted my bovs. Can\'t remember what it was. I know it was a vacuum pipe on wrong, i\'ll try and remember which one.

[ssn11]

I had this problem after i fitted my bovs. Can\'t remember what it was. I know it was a vacuum pipe on wrong, i\'ll try and remember which one.

thanks man.. what you mean bovs???
 
want to get it sorted befor ma wee bro comes to see it tonight haha

[shaggy]

blow off valves. I fitted two bailey dump valves in the stock positions and had that problem. I think a vacuum pipe had come off at the front of the manifold just underneath the pressure chamber. Have a quick look, if it\'s a pipe off you will probably see it, you will need to lift your strut brace (2x 14mm nuts per side) and remove the pressure chamber (2x10mm bolts) which should just about clear the throttle cable. You can see most vacuum/pressure control pipes from there.

[ssn11]

ok strut brace is off, but presure chamber??? er bit stuck there
also toke top intake pipe out so more room

[Bobbit]

HAVE A LOOK HERE BUD, I FOUND IT VERY USEFUL: Turbo help
And here: Rob Robinette

[ssn11]

av found it haha, in there is a few pipes with open ends on but then there one that looks to of had a cover on it and there a open ended rubber pipe nx to it trying to up load a pic jsut now

[ssn11]

what do you think?
 

[shaggy]

That\'s the one. Plug it in and see. From memory it\'s the same as mine. You may need to replace it at some point though, once they pop off they will keep coming off. Will be ok temporarily while you show off to your lil bro. lol

[shaggy]

I am currently trying to diagnose another boost control problem with mine but the only vacuum diagram i have is for a 1996 car and mine has certain changes which i am just having to guess what they do!!

[shaggy]

From memory all the 2nd turbo control is through pressure from the 1st turbo so if you are leaking pressure at that pipe you will have no second tub.

[ssn11]

it worked, and wee bro loved the car so put foot down again and it blow it off again aarrgg, new pipe reckon... is it best to uprate em all???

[shaggy]

Yeah most people recommend replacing the pipe once it has popped off once, also i\'ve heard it mentioned that it\'s wise to use small hose clips on the pressure ones.