I was boosting 8.5psi 2 days ago.

Today i take my car for a spin. and it doesn't go past 5.5 - 5.8psi and at the high rpms the boost starts to lower.

Can anyone help me ??

 

i dont know too much but ill take a wild guess and say the wastegate is opening to soon?

 

So what can you do to fix that ?

 

99% sure its a boost leak. Are you running internal or an external wastegate?

 

external wastegate.... deltagate

 

Have you messed with it? My car was doing something like that because the head on the wastegate was loose.

 

I haven't touched it after the tuning.. I did like 6 runs with 8.5psi..no problems.... I took it out the other day... and just poof...5.8psi... just like that

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blaze45 &raquo;</TD></TR><TR><TD CLASS="quote">99% sure its a boost leak. Are you running internal or an external wastegate? </TD></TR></TABLE>

I would have to agree...check for a leak

 

WG gasket is leaking or charge pipe leak , check WG gasket first .

 

I think its the thrush bearings!!

 

Yep, is those darn thrust bearing again . Oh and how is Allan ?

 

what kinda intercooler are you running ??
my friend had the same problem
t25 on a z6 making 11psi, cracked intercooler and he was making 4ish psi

another friend with the same setup had the bov loose and was making 9psi down to 5psi

 

I just have a normal sized intercooler..I was just on the highway.. and now it doesn't boost in the 1st and 2nd gear and in the 3d gear it goes to 4psi.... heellpppp

 

Dude check for a boost leak! Then if you donthave a boost leak, Im willing to bet that its your deltagate, they are not the best WG from what I have herd and read... See if you can sell it and pick up a tial?

 

Call me tomorrow we'll take everything off and put it back together again. No worries it's probable something small like a leak or something.

I think it's the wastegate as well, we'll see.

 

Problem solved, intercooler pipe was loose.

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