Quick question on blue spring
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Mountain Pass
Joined: Aug 2013
Posts: 194
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Quick question on blue spring
I currently have a blue spring that I installed on my early 04, but my buddy has an 05 and I was mentioning it to him. I'm curious with the year change did the factory install a blue spring in later years? Or did it come with the weaker spring in all years?
I searched a bunch but no answer, thanks!
I searched a bunch but no answer, thanks!
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
I tried tracking this down once using searches of previous posts and found the very first mention of a "blue spring" to be well after the last 6.0's were put in the E-Series in 2008 if I remember right. Previously, there was mention of a mod where a "BB" pellet was put in with the spring to increase pressure and before that some savvy Techs would pull the spring out and stretch it a bit which could help for a while but didn't last. I don't think any production 6.0's had a blue spring.
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
My '07 had a bad original FP spring in it, ~35-40psig at WOT when I put a gauge on it around 50k miles. Blue Spring went in as fast as the brown truck could bring it to me. 43k miles and it's holding 62psig correctly just like the first day it went in.
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Mountain Pass
Joined: Aug 2013
Posts: 194
Likes: 0
Okay that answer I gathered, it wasn't in production of the trucks. I hope this thread helps some one out trying to search for the question.
Thanks guys. Btw I love mine. A nice seat of the pants boost. But the real benefit is protecting those expensive injectors.
Thanks guys. Btw I love mine. A nice seat of the pants boost. But the real benefit is protecting those expensive injectors.
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
I agree. It would seem to me the BB could restrict flow and the correct part is too inexpensive to make it worth the gamble.
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Posting Guru
Joined: Nov 2012
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As best I remember this was a stopgap measure until the blue spring mod came out.
I remember doing the stretch the spring thing but it did not last very long.
I remember doing the stretch the spring thing but it did not last very long.
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From: Houston, Texas
Then clay came out with the FRX and that fad quickly faded.
Hotshot
Joined: Jul 2005
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From: Middle Tn.
As I stated before "not on my engine"
Hotshot
Joined: Dec 2014
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From: Jersey Shore
Back in the day of my 7.3L I came up with grinding down a 4-40 Allen head screw to a specific size to increase the tension on the fuel spring. I've got a pictorial about it in my Facebook albums. It was a very consistent boost tested with out data acquisition equipment, and was more consistent then the BB trick. It worked with the 6.0L too.
Shimming a spring like that is done by machinists when they need to adjust valve spring tension as long as the spring does not achieve coil bind. Stretching a spring never works out long time as you are breaking the molecular bonds in the metal to get it to that length, so there is less integrity in the metal and it fatigues to a shorter length over time.
Shimming a spring like that is done by machinists when they need to adjust valve spring tension as long as the spring does not achieve coil bind. Stretching a spring never works out long time as you are breaking the molecular bonds in the metal to get it to that length, so there is less integrity in the metal and it fatigues to a shorter length over time.
Lead Driver
Joined: Jul 2004
Posts: 6,951
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From: Foothills, CA
This is the one I'm talking about:
Ford Fuel Pressure Regulator Blue Spring Kit - Riffraff Diesel Performance