GDS Fuel Pressure Spring? - Ford Powerstroke Diesel Forum
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  #1  
Old 05-18-2009, 07:36 PM
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GDS Fuel Pressure Spring?

GDS Fuel Spring, has anyone tried this, does it throw lots more fuel to the motor or is it even worth buying, how easy is it to install?
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Old 05-19-2009, 03:51 PM
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NOT. I tried one and the thing pegged my fuel presure gauge 100+psi spring is way to stiff.
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Old 03-14-2012, 05:04 PM
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I understand this is an old thread. However, I want to know if anyone has actually blown O-rings running the GDS Fuel Pressure Spring? My understanding from reading and searching for hours is the O-rings have a 130psi burst rating. Since this spring runs between 90psi and 110psi what is the problem?
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Old 03-15-2012, 05:49 AM
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I ran one for awhile in my 6.0. never had any problems. i have never heard of blown o rings. I have emails from Gilette about the spring and there is a ton of psi on the oil side of the same oring.
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Old 03-15-2012, 02:08 PM
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Sounds good, thank you for the response. Starting tomorrow I will be running one in my truck.
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Old 12-29-2012, 04:19 PM
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I have had one in my truck for over 2 years now with no issues. I see a lot of people talking down on it but haven't heard of anyone have actual problems with it. Has anyone else ran one for any length of time?
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Old 12-29-2012, 05:11 PM
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I gave the one I had to my buddy years ago as the 100 + psi made me very nervous and about a month ago he's had injector cup start to leak fuel into the coolant. Is that because of the high fuel pressure IDK but that's what the mechanic that worked on his truck had said was why it cracked. It's an expensive repair job all due to a $25 spring if that's the case, not worth the risk IMO. Besides, there is some dyno evidence that shows high fuel supply pressure actually hurts HP output.

Last edited by Term3; 12-29-2012 at 05:29 PM.
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Old 12-29-2012, 05:19 PM
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Here's what my pressure was just before I took it out of my truck. I did like how it gave faster starts and made the engine a little quieter. 99+ PSI YIKES.........
GDS Fuel Pressure Spring?-imageuploadedbyautoguide1356833979.219296.jpg


Sent from my iPhone using AutoGuide.com App
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Old 12-29-2012, 05:27 PM
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I have foolishly been running the GDS spring without a FP gauge until today. Under WOT should the fuel pressure drop below 50psi with this spring.


Btw Term what gauge pod do you have in that pic? I see your gauges and what a insight possibly.
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Old 12-29-2012, 06:07 PM
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On the spring I had the pressure never got under 92 psi (stock injectors and no tunes). The gauges were custom made for me by Dakota Digital. The top gauge is my tire pressures, the next gauge is my HPOP and fuel pressure, next gauge is my EGT/boost/trans temp, the bottom gauge is my oil pressure/oil temp/volts. All the gauges except the tire pressure gauge can be switched to show only one large readout at a touch of a button on the face of each gauge, plus they have low/high alarm points that can be sent to a buzzer of some sorts. I LOVE them as I found the Autometer ones I use to have were too distracting at night.


Sent from my iPhone using AutoGuide.com App

Last edited by Term3; 12-29-2012 at 07:32 PM.
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