wastegate disconnect
wastegate disconnect
Laughing Gas
Joined: Apr 2002
Posts: 1,007
Likes: 1
From: Newport News
If you look at the drivers side of the turbo from the front end of the truck, there is a red line attached to it. Take it off and stick on the little plastic stud on the front of the intake pipe. The only real side effect is more boost because your wastegate doesn't open until much higher boost levels. Typically, it will partially start to open at 5 PSI, and be almost fully open by 8 PSI. With the red line disconnected, it will open at higher boost levels when it is forced open by boost pressure. I wouldn't do this unless you have guages so you can monitor how much boost you're actually pushing.
Terry
Terry
Posting Guru
Joined: Feb 2004
Posts: 2,248
Likes: 1
From: Elverson, PA
Well first off you'll probably get the SES light and de-fuel if the map sensor sees too much boost. And then, you will/can also shorten the life of the stock turbo with high boost levels. I have my wastegate line run through a little inline petcock switch so it's real easy to change - that way if I hook up to a trailer I just pop the hood and turn the petcock on, so the wastegate works and I'm not trying to watch the boost AND egt gauges. I also run a regulator before the MAP sensor so it never sees enough boost to trigger the SES light.
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
Originally Posted by Galatians 2:20
what damage can occur from to much boost?
Elder User
Joined: Dec 2001
Posts: 713
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From: C H I C A G O
Extra boost without adding more fuel isn't going to do anything for making more power, right ??
If I un-hook my wastegate , with the stock computer notice this and add more fuel ? By adding more boost by doing this , will the truck actually be faster ???
If I un-hook my wastegate , with the stock computer notice this and add more fuel ? By adding more boost by doing this , will the truck actually be faster ???
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
Extra boost without adding more fuel isn't going to do anything for making more power, right ??
If I un-hook my wastegate , with the stock computer notice this and add more fuel ?
By adding more boost by doing this , will the truck actually be faster ???
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Junior User
Joined: Mar 2004
Posts: 94
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From: Roscommon,Michigan
Galations 2:20,
If there were any REAL advantages to unhooking the wastegate,everyone would be doing it.Also,the factory would love to leave it off if there were no BAD side effects.It may take a few miles down the road for the consequinces to appear.Unless you are very familiar with the workings of a turbo and can adjust your driving to compensate for the dangers,I'd skip this idea.Leave this to the engineers.Call "Banks" or one of the other modifiers and go from there!Good luck!
If there were any REAL advantages to unhooking the wastegate,everyone would be doing it.Also,the factory would love to leave it off if there were no BAD side effects.It may take a few miles down the road for the consequinces to appear.Unless you are very familiar with the workings of a turbo and can adjust your driving to compensate for the dangers,I'd skip this idea.Leave this to the engineers.Call "Banks" or one of the other modifiers and go from there!Good luck!
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
If there were any REAL advantages to unhooking the wastegate,everyone would be doing it
Also,the factory would love to leave it off if there were no BAD side effects.
It may take a few miles down the road for the consequinces to appear.
Unless you are very familiar with the workings of a turbo and can adjust your driving to compensate for the dangers,I'd skip this idea.
Junior User
Joined: Mar 2004
Posts: 94
Likes: 0
From: Roscommon,Michigan
Cookie88,
I wasn't refering to engine damage.That engine can take a lot! I was talking turbo life.
I've replaced my turbos before on different engines and there wasn't a cheap one in the bunch.I guess if I wasn't retired now,(Read:reduced income)I wouldn't sweat the turbo life either.I've become a little more cautious now-a-days.
I'm new to this diesel scene so I kind of put my foot in my mouth by bringing ungoverned gas turbo problems into the equation.
Right book,wrong page! I stand corrected on this one! Thanks,Huffer
I wasn't refering to engine damage.That engine can take a lot! I was talking turbo life.
I've replaced my turbos before on different engines and there wasn't a cheap one in the bunch.I guess if I wasn't retired now,(Read:reduced income)I wouldn't sweat the turbo life either.I've become a little more cautious now-a-days.
I'm new to this diesel scene so I kind of put my foot in my mouth by bringing ungoverned gas turbo problems into the equation.
Right book,wrong page! I stand corrected on this one! Thanks,Huffer
Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
cookie88 is right (as usual), there are no ill effects from unhooking the wastegate. Of course, if you are going to mod your engine you should also have gauges to monitor performance. People also said the same thing about shimming the fuel pressure regulater in the 1997 and earlier PSDs, but this isn't true either. The bottom line is that some people have been running with these mods for much longer than cookie88 with no ill effects. Not all mods will be so kind to the engine, but more boost will actually help to burn the fuel more efficiently and keep the engine running cooler.
New User
Joined: Mar 2002
Posts: 18
Likes: 0
From: USA
I hate to keep beating this horse up but I will. Will this have any effect on EGT's? I just put a predator programmer on my truck and I'm running the 60HP program(fuel economy). I also just installed a pyro and boost gauge. The highest boost I've seen is like 22 psi. The EGT was around 1150. I have a 2002 PSD and the only real mod I guess I have done is to get rid of the muffler. I want a new intake setup but I'm still searching for the one I want. Anyway, you guys sure know a lot about these trucks. I'm ready to learn some more. Later and thanks a lot.
wesley
2002 F-250 PSD
1998 Z28 Camaro
wesley
2002 F-250 PSD
1998 Z28 Camaro
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
Originally Posted by Huffer
Cookie88,
I wasn't refering to engine damage.That engine can take a lot! I was talking turbo life.
I've replaced my turbos before on different engines and there wasn't a cheap one in the bunch.I guess if I wasn't retired now,(Read:reduced income)I wouldn't sweat the turbo life either.I've become a little more cautious now-a-days.
I'm new to this diesel scene so I kind of put my foot in my mouth by bringing ungoverned gas turbo problems into the equation.
Right book,wrong page! I stand corrected on this one! Thanks,Huffer
I wasn't refering to engine damage.That engine can take a lot! I was talking turbo life.
I've replaced my turbos before on different engines and there wasn't a cheap one in the bunch.I guess if I wasn't retired now,(Read:reduced income)I wouldn't sweat the turbo life either.I've become a little more cautious now-a-days.
I'm new to this diesel scene so I kind of put my foot in my mouth by bringing ungoverned gas turbo problems into the equation.
Right book,wrong page! I stand corrected on this one! Thanks,Huffer
Johnsdiesel brings up an excellent point. Being able to properly monitor a modified engine is paramount.
Garrett spec's out the stock turbo's on the PSD for 25 psi. Generally running a medium chip (~80hp) with an intake and exhaust will yield low to mid 20's. Unplugging the wastegate will add 3-5 psi on top of that. I was able to push mine to, and often past 30 psi for many thousands of miles, and that turbo is sitting on my workbench now with less play in the shaft than the ballbearing turbo that replaced it.
Obviously there is some inherent danger involved with performing any modification, but unhooking the wastegate is pretty low on the scale. Installing the chip in the first place is far more dangerous than unhooking the wastegate on the PSD.
Z28 puller: Don't even worry about 1150. No danger there.
Last edited by cookie88; May 24, 2004 at 05:27 PM.