5psi actuator hitting 10psi-GREDDY
#1
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HI Guys
I seem to be hitting like 165Kpa at about 5000rpm on a stock actuator which i believe should only be reaching 5psi.
I have been searching for a few hours on this matter, and have found a few threads with what sounds like the exact issue i am having.
I believe it is called "Boostcreep"? Yeah i am a![Noob](https://www.miataturbo.net/images/smilies/noob.gif)
The problem is no one ever seems to post up what fixed it.
The threads just end.
I am running a
DIYPNP
ETD MANIFOLD
GREDDY TD04H Turbo
P630 ACTUATOR (i believe it should be 5psi)
TURBO TONY DOWNPIPE
Stock EXHAUST
Here is a log with at least one solid pull.
http://www.mediafire.com/?j0k8rf2rdc3bc0h
And a quick screenshot.
![](https://www.miataturbo.net/attachments/megasquirt-18/35307-5psi-actuator-hitting-10psi-greddy-log-1.jpg?dateline=1330400890)
Any help would be much appreciated.
It appears the Wastegate opens fully when i disconnect the actuator arm.
The arm is quite tight, but i have left it how i received it.
Thanks guys.
I seem to be hitting like 165Kpa at about 5000rpm on a stock actuator which i believe should only be reaching 5psi.
I have been searching for a few hours on this matter, and have found a few threads with what sounds like the exact issue i am having.
I believe it is called "Boostcreep"? Yeah i am a
![Noob](https://www.miataturbo.net/images/smilies/noob.gif)
The problem is no one ever seems to post up what fixed it.
The threads just end.
I am running a
DIYPNP
ETD MANIFOLD
GREDDY TD04H Turbo
P630 ACTUATOR (i believe it should be 5psi)
TURBO TONY DOWNPIPE
Stock EXHAUST
Here is a log with at least one solid pull.
http://www.mediafire.com/?j0k8rf2rdc3bc0h
And a quick screenshot.
![](https://www.miataturbo.net/attachments/megasquirt-18/35307-5psi-actuator-hitting-10psi-greddy-log-1.jpg?dateline=1330400890)
Any help would be much appreciated.
It appears the Wastegate opens fully when i disconnect the actuator arm.
The arm is quite tight, but i have left it how i received it.
Thanks guys.
#4
Cpt. Slow
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Is it the actuator that came with the greddy kit? If so, it's garbage. I'd highly suggest replacing it with pretty much anything else that will fit before wasting your time trying to fix it.
My boost gauge was jumping all over the place, like, a blurr. I replaced the actuator and it was rock solid, although it tapered off towards red line.
I changed my boost source to Joe Perez's magical source and had rock solid boost all the way to red line.
https://www.miataturbo.net/diy-turbo-discussion-14/boost-sag-no-you-dont-need-ebc-47532/
My boost gauge was jumping all over the place, like, a blurr. I replaced the actuator and it was rock solid, although it tapered off towards red line.
I changed my boost source to Joe Perez's magical source and had rock solid boost all the way to red line.
https://www.miataturbo.net/diy-turbo-discussion-14/boost-sag-no-you-dont-need-ebc-47532/
#5
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
You say the actuator arm is very tight fitting onto the wastegate arm? Sounds like it may have a lot of preload on it. Adjust the length of the arm until there is no more preload on the flapper. If it rattles, tighten it just a little bit. TD04s shouldn't need any porting of the wastegate path.
#9
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![](https://www.miataturbo.net/images/smilies/bowrofl.gif)
MY BAD!!
Well it just started Pouring rain here in Sydney, so will go down to the garage and adjust tonight and go for a run tomorrow to test it out if it is not quite so swamp like.
Hopefully this sorts things.
Thanks ALL!!
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