|
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 |
Re: Slow building boost after external wg install.
bump
|
Re: Slow building boost after external wg install.
Where do you have the line for the wastegate getting its boost signal from?
|
Re: Slow building boost after external wg install.
Originally Posted by viper_boy403
(Post 42464129)
Where do you have the line for the wastegate getting its boost signal from?
|
Re: Slow building boost after external wg install.
Can you move the boost signal line closer to the wastegate? Like directly off the turbo housing?
Mike |
Re: Slow building boost after external wg install.
Originally Posted by 89efhatch
(Post 42464219)
Can you move the boost signal line closer to the wastegate? Like directly off the turbo housing?
Mike |
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 |
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
|
Re: Slow building boost after external wg install.
Originally Posted by 89efhatch
(Post 42464411)
Shortest possible line to the wastegate seems to work best. The boost signal off the compressor housing is right there and accurate.
Mike I changed the vac source to the compressor housing and it did not change anything. It must be a boost leak somewhere. |
Re: Slow building boost after external wg install.
How can there be a boost leak if when u take the vac line off it hits ur boost cut? Check the waste gate
|
Re: Slow building boost after external wg install.
Or maybe ur exhaust housing is cracked. Did ur turbo have a flapper before?
|
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. :) |
Re: Slow building boost after external wg install.
Do a boost leak on the car
|
Re: Slow building boost after external wg install.
Originally Posted by turbohatch96y7
(Post 42467936)
Or maybe ur exhaust housing is cracked. Did ur turbo have a flapper before?
|
Re: Slow building boost after external wg install.
Originally Posted by Honda Bull
(Post 42468408)
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. :) |
Re: Slow building boost after external wg install.
I would take it apart and recheck it..
|
Re: Slow building boost after external wg install.
did you install the fire ring on the wastegate?
|
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 |
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.
|
Re: Slow building boost after external wg install.
Originally Posted by tofast4uh22
(Post 42476235)
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.
|
Re: Slow building boost after external wg install.
It is a 4psi spring. Should i get an 8psi spring?
|
Re: Slow building boost after external wg install.
Bump
|
Re: Slow building boost after external wg install.
It is a 4psi spring. Should i get an 8psi spring?
|
Re: Slow building boost after external wg install.
yes. but only if that is the lowest target boost that you will want to see.
|
Re: Slow building boost after external wg install.
Originally Posted by 98exn20
(Post 42485272)
yes. but only if that is the lowest target boost that you will want to see.
|
| All times are GMT -8. The time now is 12:58 PM. |
© 2024 MH Sub I, LLC dba Internet Brands