does this sound like a wastgate problem???
#1
Burning Brakes
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does this sound like a wastgate problem???
I think i finnaly have my boost controller hooked up right, and this what is going on now. the car will boost to the set boost then quickly drop back to around 8 psi. I have a used Deltaget. Think this is the weak link?
#2
So how did you rectify the lbe? Are you controlling the Delta with it? I think you were getting some confused feedback in the other post from guys who weren't reading all the posts.
Your sig doesn't say what turbo you have - a worn 26/6 may naturally drop back to 7-8 pounds at redline because of its own limitations.
<img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />
Your sig doesn't say what turbo you have - a worn 26/6 may naturally drop back to 7-8 pounds at redline because of its own limitations.
<img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />
#7
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Hey Chris,
The Deltagate worked when I removed it from my car so I don't think that is the problem, but it is always a possibility.
I am sure you have checked for boost leaks around hoses?
Is the turbo in good shape? An original tired turbo may only hold 8 psi at redline.
The Deltagate worked when I removed it from my car so I don't think that is the problem, but it is always a possibility.
I am sure you have checked for boost leaks around hoses?
Is the turbo in good shape? An original tired turbo may only hold 8 psi at redline.
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#9
Race Director
How are you hooking up the Deltagate? It should only be used in single-port configuration with the LBE. The way this works is to have the top vacuum port open to the atmosphere. Then the control line from the LBE should plug into the side boost-port. If this is the way you have it hooked up, then we need to look at the wastegate itself.
"the car will boost to the set boost then quickly drop back to around 8 psi."
Konstantin had a similar problem last year. I think he resolved it by installing the stiffer spring and he may have even replaced the wastegate as well.
"the car will boost to the set boost then quickly drop back to around 8 psi."
Konstantin had a similar problem last year. I think he resolved it by installing the stiffer spring and he may have even replaced the wastegate as well.
#10
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Can a stiffer spring be used on stock wastegate or only aftermarket?
If so, how much difference from shimming?
If so, how much difference from shimming?
#11
Race Director
Shimming typically raises the opening pressure (at the diaphragm nipple) from 3-4psi to around 5-6psi. This is good enough to cut the high-RPM boost-drop in half (13psi with 15psi max-boost instead of 10psi stock).
Our upcoming wastegate upgrade installs a stiffer spring to have wastegate opening start at around 13-14psi; significantly stronger than a shimmed one. This will allow a stock turbo to hold max-boost to redline. However, due to the extensive precision machining required, these wastegates are only available on an exchange/core basis.
Our upcoming wastegate upgrade installs a stiffer spring to have wastegate opening start at around 13-14psi; significantly stronger than a shimmed one. This will allow a stock turbo to hold max-boost to redline. However, due to the extensive precision machining required, these wastegates are only available on an exchange/core basis.