Disabling Wastegate
Senior User
Joined: Mar 2006
Posts: 171
Likes: 0
From: Houston, TX
If you just unplug the red vacuum hose you shouldn't have to worry about any thing.
With it unpluged you produce more boost.
The wastegate has a vacuum actuator. There is a spring in there as well that provides tension to the actuator arm. The vacuum relieves some of the force applied from the spring allowing the wastegate to open. With no vacuum the full force of the spring is holding the wastegate shut. Thus delaying its opening and producing more boost.
IMO unhooking the wastegate shouldn't hurt anything.
I keep mine unhooked and have shortened the actuator arm abit.
I hope that wasn't too confusing.
WB
With it unpluged you produce more boost.
The wastegate has a vacuum actuator. There is a spring in there as well that provides tension to the actuator arm. The vacuum relieves some of the force applied from the spring allowing the wastegate to open. With no vacuum the full force of the spring is holding the wastegate shut. Thus delaying its opening and producing more boost.
IMO unhooking the wastegate shouldn't hurt anything.
I keep mine unhooked and have shortened the actuator arm abit.
I hope that wasn't too confusing.
WB
Tuned
Joined: Dec 2005
Posts: 294
Likes: 0
Wastegate
Originally Posted by ponch37300
do you have to plug the end of the red hose you pull off or just leave it tucked out of the way. does this make a bigger whoosh noise when the wastegate finally opens? thanks
. The one thing you have to watch for is if you overboost, you get a ChecK Engine light that goes away after a few minutes. You probably won't see it unless you have a tuner, my DP chip will throw one right away. I did it, didn't notice any change to milage, but your truck will give you more seat-of-the-pants accelleration when you are into it. I didn't notice any more woosh, but I have an AIS so I already get LOTS of Wooosh.
Postmaster
Joined: Jun 2005
Posts: 3,438
Likes: 0
From: New Hampshire
You'll get faster spool up since the wastegate isn't being opened by the
pcm. The pcm starts opening the gate around 5psi. Shortening the actuator rod
will increase max boost. You should pick up a boost relief valve or regulator to
prevent throwing a code and having the engine defuel.
Keep in mind that this stuff will shorten the life of the turbo bearings and will
result in an earlier rebuld of the turbo. You won't see the full potential of a chip
unless u mod the turbo somewhat. I have my turbo fitted with a larger
exhaust housing to compensate for uneven drive pressures on the bearings.
Nut
pcm. The pcm starts opening the gate around 5psi. Shortening the actuator rod
will increase max boost. You should pick up a boost relief valve or regulator to
prevent throwing a code and having the engine defuel.
Keep in mind that this stuff will shorten the life of the turbo bearings and will
result in an earlier rebuld of the turbo. You won't see the full potential of a chip
unless u mod the turbo somewhat. I have my turbo fitted with a larger
exhaust housing to compensate for uneven drive pressures on the bearings.
Nut
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Senior User
Joined: May 2006
Posts: 316
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From: Elmendorf AFB, Anchorage
Trending Topics
Postmaster
Joined: Jun 2005
Posts: 3,438
Likes: 0
From: New Hampshire
Originally Posted by powerstrokin007
Are you talking about the red hose that is next to the green vacuum hose?
Kwik reconnected his because of what happened to Chad(Cat_man) and his
turbo leaking oil. Chad eventually invested in a Garrett GTP38R BB unit .Amongst other turbo goodies.
Nut
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Cargo Master
Joined: Jan 2002
Posts: 2,079
Likes: 11
From: LA and CO
Originally Posted by wbhinton
I keep mine unhooked and have shortened the actuator arm abit.
I hope that wasn't too confusing.
WB
Yes, very confusing! Why the shortened arm if the line is disconnected. Does it still actuate even with the tube disconnected????
Bear with me, I'm still new to the PSD's.....
Postmaster
Joined: Jun 2005
Posts: 3,438
Likes: 0
From: New Hampshire
Originally Posted by John7894
Yes, very confusing! Why the shortened arm if the line is disconnected. Does it still actuate even with the tube disconnected????
Bear with me, I'm still new to the PSD's.....
Bear with me, I'm still new to the PSD's.....
which keeps the wastegate closed longer.
Nut
Postmaster
Joined: Jun 2005
Posts: 3,438
Likes: 0
From: New Hampshire
Originally Posted by John7894
But, does the wastegate still actuate with the tube disconnected? Does it open just because of the boost pressures?
Nut
Postmaster
Joined: Jun 2005
Posts: 3,438
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From: New Hampshire
Originally Posted by John7894
Gotcha!
How will this affect the life of the turbo? Will it affect it because of the unequal pressures on either side of the housing?
How will this affect the life of the turbo? Will it affect it because of the unequal pressures on either side of the housing?
This is why the ball bearing unit is superior in dependability under higher boost pressure(upwards of 40psi sustained).
Nut
Elder User
Joined: Feb 2000
Posts: 737
Likes: 0
From: LAKE FORK TEXAS
I shortened my Wastegate rod and left the red line plugged in. My rod is pretty tight,i actually thought it might be too tight but with the line hooked up i can still set the CEL. 24lbs of boost for about 20 secs and the light will come on,without the line hooked up i can hit 27-29 depending on load. I did notice about a 50* increase in EGT when i hooked the line back up though.