GDS Fuel spring - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 29 (permalink) Old 08-23-2011, 07:31 PM Thread Starter
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GDS Fuel spring

i am looking at doing the GDS fuel spring upgrade and i started reading and they are saying that fuel pressure will be up to or over 100 psi thats nuts . or should i just buy the kit from ford and get the blue spring ??
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post #2 of 29 (permalink) Old 08-23-2011, 08:40 PM
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Re: GDS Fuel spring

get the oem kit.
This thread has a few different part numbers at different prices, post #8. But all of it is a good read.
Should a guy be afraid to install the blue spring without a fuel pressure gauge? - Ford Truck Enthusiasts Forums
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post #3 of 29 (permalink) Old 08-23-2011, 10:28 PM
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Re: GDS Fuel spring

max fuel pressure to the injectors should be 70psi the Gillet spring puts it at 100psi wayyy too high

anything higher you risk blowing out injector o-rings left and right
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post #4 of 29 (permalink) Old 08-23-2011, 10:38 PM
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Re: GDS Fuel spring

Greg have you replaced your fuel spring with the updated blue spring?

2004 F350 6.0 ECSB Lariat. All the normal stuff
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post #5 of 29 (permalink) Old 08-23-2011, 10:51 PM
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Re: GDS Fuel spring

yes I sure did, when did my 6.4 banjo bolts
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post #6 of 29 (permalink) Old 08-23-2011, 11:05 PM
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Re: GDS Fuel spring

Gotcha. I need to do this!

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post #7 of 29 (permalink) Old 08-24-2011, 03:55 AM
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Re: GDS Fuel spring

i ran the gds spring for sometime with no problems. my fuel pressure gauge was pegged at 100 psi though. With that spring I noticed a much crispier low end and better throttle response. hazed smoke a little more too

03 6.0 Full EGR delete, S&B CAI, 4in turbo back, 70hp injectors, Moded Banjos, fuel spring mod, GearHeads, RCD, IDP and TSD tuned, trans temp, boost, egt, fuel press, MIA
08 6.4 4in dp. 5in TBE. S&B, Studs, EGR delete, No limit elbow/CAC pipe, Spartan, TSD, QTP and IDP LW tuned
07 5.9 5in TBE, Goerend, Fass, EFI Anarchy Diesel Tuning
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post #8 of 29 (permalink) Old 08-24-2011, 06:08 AM
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Re: GDS Fuel spring

do the one from ford its cheaper with the whole kit new seals, front cover, etc.
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post #9 of 29 (permalink) Old 08-25-2011, 04:56 PM Thread Starter
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Re: GDS Fuel spring

i konw it sounds like a dumb question but whats the 6.4 banjo bolts and where are the located
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post #10 of 29 (permalink) Old 08-25-2011, 05:03 PM
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Re: GDS Fuel spring

Banjo bolts allow the fuel to enter the passage on the heads. The reason for using the 6.4 banjo bolts instead of the stock 6 liter bolts are because it prevents the back injectors from getting starved of fuel. They are located on the front of the heads. Follow the fuel lines down to each side of the head you'll find them.

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