Slow building boost after external wg install.
05-13-2010, 01:12 AM
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Slow building boost after external wg install.
I installed an external wastegate and when I WOT the car it sticks at 5psi for a long time then builds boost very slow. I removed the vacuum source to the Tial and it built boost very fast but of course hit boost cut. What would be causing this?
My setup:
D16y7
Greddy 15g 9psi
Tial 35mm
TurboXS MBC
My setup:
D16y7
Greddy 15g 9psi
Tial 35mm
TurboXS MBC
05-13-2010, 08:55 AM
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05-13-2010, 09:06 AM
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05-13-2010, 09:19 AM
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Re: Slow building boost after external wg install.
Shortest possible line to the wastegate seems to work best. The boost signal off the compressor housing is right there and accurate.
Mike
Mike
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05-13-2010, 12:42 PM
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Re: Slow building boost after external wg install.
It sounds like the waste gate isnt closed all the way. Or theres a leak.check to see if the wastegate is leaking or take off ur dump tube and see if its closed all the way
05-13-2010, 12:56 PM
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Re: Slow building boost after external wg install.
05-13-2010, 03:08 PM
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05-13-2010, 03:56 PM
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Re: Slow building boost after external wg install.
Was the TiAL wastegate new? Even if it was, did you even bother inspecting it internally to make sure the valve, diaphram, etc. are in fine working condition?
The excess vacuum line from back at the manifold to the wastegate has the potential to slow spool down a bit, but not how you describe, and it will account for any boost that is lost between the compressor housing back to the throttle body. Running the line from the compressor housing, the wastegate will still see 9 psi, but that doesn't always mean that's what is present in the intake manifold. Just food for thought for you.
The excess vacuum line from back at the manifold to the wastegate has the potential to slow spool down a bit, but not how you describe, and it will account for any boost that is lost between the compressor housing back to the throttle body. Running the line from the compressor housing, the wastegate will still see 9 psi, but that doesn't always mean that's what is present in the intake manifold. Just food for thought for you.
05-13-2010, 04:38 PM
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05-13-2010, 04:39 PM
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Re: Slow building boost after external wg install.
Was the TiAL wastegate new? Even if it was, did you even bother inspecting it internally to make sure the valve, diaphram, etc. are in fine working condition?
The excess vacuum line from back at the manifold to the wastegate has the potential to slow spool down a bit, but not how you describe, and it will account for any boost that is lost between the compressor housing back to the throttle body. Running the line from the compressor housing, the wastegate will still see 9 psi, but that doesn't always mean that's what is present in the intake manifold. Just food for thought for you.
The excess vacuum line from back at the manifold to the wastegate has the potential to slow spool down a bit, but not how you describe, and it will account for any boost that is lost between the compressor housing back to the throttle body. Running the line from the compressor housing, the wastegate will still see 9 psi, but that doesn't always mean that's what is present in the intake manifold. Just food for thought for you.
05-14-2010, 08:21 AM
#18
Re: Slow building boost after external wg install.
Have you changed your downpipe since you installed the external WG? I installed my turbo setup and I didn't run a downpipe and it took forever to build boost. Once I had one fabricated it hit the desired boost level much faster. Make sure that you have a properly sealed downpipe.
Good luck,
Blaze
Good luck,
Blaze
05-14-2010, 10:51 AM
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Re: Slow building boost after external wg install.
what spring is in the wastegate? it kind of sounds like it has a 5psi spring in it and then the additional boost that starts coming slowly might just be boost creep.
05-14-2010, 11:14 AM
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Re: Slow building boost after external wg install.
thats what it is i bet... my car spooled really fast with a 14lb spring... i put a 7.5 psi spring in it and it spools slower b/c it opens up quicker
05-15-2010, 04:01 PM
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