BBK Full compressor surge at only 27 psi?
Feb 21, 2011, 12:11 PM
#46
Rich,
are you running an o2 dump or standard gate?
also- what are you running for boost correction?
we have only seen creep on one car that had an o2 dump where when the flapper opened the inlet to the dump side was actually being blocked by the flapper and not allowing the WG gases to exit properly... we put a megan o2 housing back on.. and it went back to normal!
cb
are you running an o2 dump or standard gate?
also- what are you running for boost correction?
we have only seen creep on one car that had an o2 dump where when the flapper opened the inlet to the dump side was actually being blocked by the flapper and not allowing the WG gases to exit properly... we put a megan o2 housing back on.. and it went back to normal!
cb
Feb 21, 2011, 12:41 PM
#47
Rich,
are you running an o2 dump or standard gate?
also- what are you running for boost correction?
we have only seen creep on one car that had an o2 dump where when the flapper opened the inlet to the dump side was actually being blocked by the flapper and not allowing the WG gases to exit properly... we put a megan o2 housing back on.. and it went back to normal!
cb
are you running an o2 dump or standard gate?
also- what are you running for boost correction?
we have only seen creep on one car that had an o2 dump where when the flapper opened the inlet to the dump side was actually being blocked by the flapper and not allowing the WG gases to exit properly... we put a megan o2 housing back on.. and it went back to normal!
cb
Feb 26, 2011, 09:18 PM
#49
Incidentally, I can understand why CBRD voids the turbo warranty when you install this cover. There's obviously lots that can get messed up when you take the turbo apart, and that snap ring that holds the compressor housing on is quite a chore to mess with (though less so for me thanks to my kind wife giving me a hand with reinstalling it).
Feb 26, 2011, 10:41 PM
#51
Newbie
Join Date: Apr 2010
Location: Caribbean
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
Hmm...On throttle surge eh?
I just spent 8 months developing a new gizmo that can deal with that (even below WG crack) and lot's more....
Have a look?
https://www.evolutionm.net/forums/ev...roduction.html
I just spent 8 months developing a new gizmo that can deal with that (even below WG crack) and lot's more....
Have a look?
https://www.evolutionm.net/forums/ev...roduction.html
Mar 5, 2011, 11:04 AM
#58
Evolving Member
iTrader: (2)
Join Date: Dec 2009
Location: South Africa
Posts: 312
Likes: 0
Received 0 Likes
on
0 Posts
My bbk full failed... because of surge according to me... did less that 2000 miles...
The problem is also CBRD (Chad) get his turbos from Blouch...
Blouch said it over speeded.
I did boost it 2bar 29 psi... at 4500 feet altitude... it equals around 31 psi
Blouch said that the turbo over sped due to leaks in the pressure system.... funny they can make that claim without seeing a leak them self... I tested it and found no leaks.
The boost pipe on the intercooler did jump off a couple of times in a duration of 2 days. if its is the case... big if... I never would have thought a turbo is that fragile.
" What is compressor surge?
The surge region, located on the left-hand side of the compressor map (known as the surge line), is an area of flow instability typically caused by compressor inducer stall. The turbo should be sized so that the engine does not operate in the surge range. When turbochargers operate in surge for long periods of time, bearing failures may occur. When referencing a compressor map, the surge line is the line bordering the islands on their far left side.
Compressor surge is when the air pressure after the compressor is actually higher than what the compressor itself can physically maintain. This condition causes the airflow in the compressor wheel to back up, build pressure, and sometimes stall. In cases of extreme surge, the thrust bearings of the turbo can be destroyed, and will sometimes even lead to mechanical failure of the compressor wheel itself."
From Garret website:
Chad did try his best... but he does not build the BBK and is pending on blouch for support. Its also been months and no official report from blouch...and that is a bit low key if you ask me. Blouch also said the turbo is scrap and cant be repaired.
Then when I asked the turbo to be shipped to FP, they refused at first.
Long story short... Chad did get it shipped.
I got the turbo shipped to FP which said they can make it into a green HTA.
FP FTW! And I will support Chad again on getting some other products... but I will pass on the BBK's... in future.
The problem is also CBRD (Chad) get his turbos from Blouch...
Blouch said it over speeded.
I did boost it 2bar 29 psi... at 4500 feet altitude... it equals around 31 psi
Blouch said that the turbo over sped due to leaks in the pressure system.... funny they can make that claim without seeing a leak them self... I tested it and found no leaks.
The boost pipe on the intercooler did jump off a couple of times in a duration of 2 days. if its is the case... big if... I never would have thought a turbo is that fragile.
" What is compressor surge?
The surge region, located on the left-hand side of the compressor map (known as the surge line), is an area of flow instability typically caused by compressor inducer stall. The turbo should be sized so that the engine does not operate in the surge range. When turbochargers operate in surge for long periods of time, bearing failures may occur. When referencing a compressor map, the surge line is the line bordering the islands on their far left side.
Compressor surge is when the air pressure after the compressor is actually higher than what the compressor itself can physically maintain. This condition causes the airflow in the compressor wheel to back up, build pressure, and sometimes stall. In cases of extreme surge, the thrust bearings of the turbo can be destroyed, and will sometimes even lead to mechanical failure of the compressor wheel itself."
From Garret website:
Chad did try his best... but he does not build the BBK and is pending on blouch for support. Its also been months and no official report from blouch...and that is a bit low key if you ask me. Blouch also said the turbo is scrap and cant be repaired.
Then when I asked the turbo to be shipped to FP, they refused at first.
Long story short... Chad did get it shipped.
I got the turbo shipped to FP which said they can make it into a green HTA.
FP FTW! And I will support Chad again on getting some other products... but I will pass on the BBK's... in future.
Last edited by acssa; Mar 5, 2011 at 11:07 AM.