GDS FUEL SPRING UPGRADE
Elder User
Joined: Jul 2005
Posts: 716
Likes: 0
From: memphis
I installed the 9t517 kit yesterday and fuel pressure went from a rough 52-55 to a soild 58psi. after about 10 minutes it dropped to 57. since my target fuel pressure was 60-65 psi I performed a BB mod, which increased my pressure to 65. Maybe I had problems by my truck is more responsive off idle and the injectors are a little happier going do the road. Most improvements are at light throttle. Now I can hear that the drive shaft needs some attention.
I hear turbo and tail pipe
I hear turbo and tail pipe
Senior User
Joined: Mar 2009
Posts: 172
Likes: 0
From: SENECA
Have to ask, what is the BB mod?
BRANDON
06 F250 PSD CC 4X4 FX4 XLT
SCT (DP TUNER)/EDGE INSIGHT MONITOR
ARP STUDS/EGR DELETE (GILLETTE)
4" MBRP TURBO BACK EXHAUST
ZOODAD MOD/REAR AIR BAGS
35X12.5X20 NITTO MUD GRAPPLERS
XD MONSTER WHEELS
BRANDON
06 F250 PSD CC 4X4 FX4 XLT
SCT (DP TUNER)/EDGE INSIGHT MONITOR
ARP STUDS/EGR DELETE (GILLETTE)
4" MBRP TURBO BACK EXHAUST
ZOODAD MOD/REAR AIR BAGS
35X12.5X20 NITTO MUD GRAPPLERS
XD MONSTER WHEELS
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
I just did the BB mod, it was free and bumped my fuel pressure from 52 idle to 63 idle. Also, WOT used to drop to 44, not it drops to 55, much better. For the BB mod just place a BB between the brass cup and spring in the regulator, but only do this if you have a fuel gauge and have verified low pressure.
Thread Starter
|
Elder User
Joined: Feb 2009
Posts: 649
Likes: 2
From: PA
I hear ya. I read about guys shimming this spring and I thought what could they shim it with? Didn't even think about a BB, oh well I got the kit and a GDS spring. If I wouldn't have spent it on that, the wife would have spent it at Walmart.
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
this matchs exactly my findings. if you drive loaded and boosted it would drop to 48-52. still great
Elder User
Joined: Jul 2005
Posts: 716
Likes: 0
From: memphis
You think I would have been ok with the 57 psi?
I never drove the truck after the kit install. I had 60+ psi in my mind
because I read that somewhere. The new spring was stiffer so it should recover from a
pressure drop quicker. There is a major difference in the way the truck feel now.
It may be in my mind because the RPMs are still @ 700 but the vibration at idle is different. It feels like it's ready to run, like when you put a aftermarket exhaust on a BB chevy.
I never drove the truck after the kit install. I had 60+ psi in my mind
because I read that somewhere. The new spring was stiffer so it should recover from a
pressure drop quicker. There is a major difference in the way the truck feel now.
It may be in my mind because the RPMs are still @ 700 but the vibration at idle is different. It feels like it's ready to run, like when you put a aftermarket exhaust on a BB chevy.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Senior User
Joined: Mar 2010
Posts: 153
Likes: 0
From: Kearns, UT
I installed the GDS fuel spring upgrade on my 04 F350 6.0 with 127,000 miles on it. Since the install I've noticed the engine runs smoother, crisper, and maybe a little peppier at part throttle. The idle is now smooth and consistant, whereas before it was a little rough most of the time and somewhat smooth sometimes. It's well worth the $20 they charge. Simple install too.
Elder User
Joined: Aug 2009
Posts: 905
Likes: 0
From: Inverness, Fl
I installed the GDS fuel spring upgrade on my 04 F350 6.0 with 127,000 miles on it. Since the install I've noticed the engine runs smoother, crisper, and maybe a little peppier at part throttle. The idle is now smooth and consistant, whereas before it was a little rough most of the time and somewhat smooth sometimes. It's well worth the $20 they charge. Simple install too.
Fleet Owner
Joined: Nov 2003
Posts: 27,900
Likes: 3,617
I installed the GDS fuel spring upgrade on my 04 F350 6.0 with 127,000 miles on it. Since the install I've noticed the engine runs smoother, crisper, and maybe a little peppier at part throttle. The idle is now smooth and consistant, whereas before it was a little rough most of the time and somewhat smooth sometimes. It's well worth the $20 they charge. Simple install too.
Mountain Pass
Joined: Mar 2007
Posts: 147
Likes: 0
From: North Pole, AK
Do you have to have a guage to do the BB mod? Is the purpose of the BB mod to make the spring longer or stiffer? I havent looked at where this spring is but is there any way it could block off any fuel from the engine?
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
the idea is to have a correctly calibrated spring. to calibrate it takes a gauge. all aspects of the spring from length to coil diameter all effect its operation from the pressure it will hold to its ability to recoil and reseal once it pops to relive pressure.
it could casue a loss of pressure by being to weak and or venting to soon or often.
now so far as blocking off i guess you could somehow misinstall it and manage that but thats got to be near impossible.
it could casue a loss of pressure by being to weak and or venting to soon or often.
now so far as blocking off i guess you could somehow misinstall it and manage that but thats got to be near impossible.