Duramax Diesels Forum Truck of the Week
  #1  
Old 06-05-2017, 12:55 PM
Hahns069 Hahns069 is offline
FNG
 
Join Date: Jun 2017
Posts: 1
Default Why use a RACE FUEL VALVE

Hello I'm kind of new to this forum thing. My son bought a PPE Race Fuel Valve for my LLY. I'm Try to understand why I would need to install this in my truck. What would be the benefit of installing this? Also what is the down side using this Fuel Valve plug. Will it damage anything? Does it make more horse power? I get kind of nervous messing with the stock items in the truck. If anyone out there can shed a little light of info on me.
Thanks again................
Reply With Quote
  #2  
Old 06-05-2017, 01:09 PM
WolfLLY's Avatar
WolfLLY WolfLLY is offline
Making Chips
 
Join Date: Nov 2006
Location: AL
Posts: 4,098

Default

Keeps rail pressure up. Factory valve can be weak and allow fuel to leak to the return side, thus causing low rail pressure during power enrichment. It's a safe mod.
__________________
LMM CCSB LTZ Z71. SoCal motor, s485/68r, 1078 Limitless converter, S&S 200s.


LB7 ECSB 4X4

Thanks to Evan@Limitless, Mark@Danville Performance, Josh Harris@Top Notch, and Corbin(crussel)
Reply With Quote
  #3  
Old 06-05-2017, 01:11 PM
D1rty-max's Avatar
D1rty-max D1rty-max is offline
Spare some change?
 
Join Date: Jul 2015
Location: Longview, TX
Posts: 80
Default

Does away with the relief valve which can pop open at higher rail pressure it won't hurt a thing installing it! The stock valve gets weak after popping a couple times it should help fix low fuel rail pressure codes if you are having issues with the stock relief valve opening
__________________
2006 LBZ
HSP S366/73/.91-T4 Single, HSP single kit w/3" Y-bridge, Arp studs/grade C gaskets, PPE stage 5 trans, egr delete, PCV reroute, Fleece 10mm cp3/Fass 150, 60% Injectors, efi live by Kory Willis, HSP Cold Air intake, 2 inch up pipes/lml manifold, 4 inch Flopro, kryptonite tierods/motor mounts, PPE fuel race plug, 7 inch BDS lift with fox shocks on 37s
Reply With Quote
  #4  
Old 06-05-2017, 01:12 PM
Chevy1925's Avatar
Chevy1925 Chevy1925 is offline
don't know sh!t about IFS

 
Join Date: Oct 2009
Location: Phoenix Az
Posts: 12,896

Default

the plug goes in place of the fuel pressure relief valve. on 04.5-10 trucks, the fuel pressure relief valve (FPRV for short) has a tendency to pop open when running larger tunes or higher demanded fuel rail pressure. once it pops, it becomes very easy for it to pop again and again even on a stock tune. There is a test that can be performed called a "bottle test". do a search on here and it will explain that.

the plug effectively stops the issue as it replaced the FPRV but you no longer have a "safety device" to protect injectors or the CP3 from too high a rail pressure and hurting parts. in all the years ive played with these trucks ive only seen a handful of trucks have issues from a rail plug and it was back in the day when people were mixing larger cp3's with stock CP3s and not tuning things correctly or hard parts just were prone to fail from bad casting, etc. i run a race valve in my truck though.

so it wont make HP, it just makes sure you get all the power you could have
__________________
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
Reply With Quote
  #5  
Old 06-05-2017, 01:24 PM
NinjaMax's Avatar
NinjaMax NinjaMax is offline
WTF!

 
Join Date: Oct 2012
Location: Severance, Colorado
Posts: 1,150

Default

and it sucks balls to get the fprv out...on an epic level...
__________________
Wade

2017 Chevy "Sport" 2500hd CCSB ltz stocker

2006 Chevy LBZ - Deleted, 5" Magnaflow, Airdog II 165 4g.

2006 Chevy lbz LT ccsb 360,000 and counting..
5" exhaust, CAI...custom hail damage, peeling paint, etc...

2016 GMC 1500 slt 6.2ltr -wife's ride-

Sold
2016 Denali HD~tuned deleted
05 LLY CCSB~EPR compounds, cognito stuff, DDD Tuning, etc..



Reply With Quote
  #6  
Old 06-05-2017, 02:54 PM
LBZ's Avatar
LBZ LBZ is offline
Super Moderator
 
Join Date: Jul 2007
Location: Ontario
Posts: 9,695

Default

http://www.duramaxdiesels.com/forum/...read.php?t=267

Sent from my D5803 using Tapatalk
Reply With Quote
  #7  
Old 06-05-2017, 02:55 PM
LBZ's Avatar
LBZ LBZ is offline
Super Moderator
 
Join Date: Jul 2007
Location: Ontario
Posts: 9,695

Default

Personally I would just shim the factory valve and save my money.

Sent from my D5803 using Tapatalk
Reply With Quote
  #8  
Old 06-05-2017, 03:08 PM
Chevy1925's Avatar
Chevy1925 Chevy1925 is offline
don't know sh!t about IFS

 
Join Date: Oct 2009
Location: Phoenix Az
Posts: 12,896

Default

Quote:
Originally Posted by LBZ View Post
Personally I would just shim the factory valve and save my money.

Sent from my D5803 using Tapatalk
ive welded the hole shut on the back side of the fprv before. use it as a test plug to see if the race plug is leaking due to a bad seal on trucks. ive contemplated just welding them
__________________
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
Reply With Quote
  #9  
Old 06-05-2017, 04:40 PM
zf>allison's Avatar
zf>allison zf>allison is offline
you never had your car.
 
Join Date: Apr 2013
Location: elsberry mo
Posts: 2,765

Default

Mine was welded on the crew cab, I think it's safer to have a plug than loosing rail pulling out in traffic or passing someone for sure.
__________________
04.5 single cab lly zf6 barely not stock.(the jalopy)
05 single cab lly zf6
Arp studs, welded water pump, 100 overs, dual fuelers, s475/87/.90, weighted Dual disc south bend, danville efi live, fass 150, custom single s400 kit,
serious weight reduction
285/60/17 toyo proxes on lmm wheels
Down on 2 leaves, t bolts gone.

best
11.28 at 126 mph, 1.8 60 foot
dynoed 743 hp 5340 raceweight
Instagram-636zf6
Reply With Quote
  #10  
Old 06-05-2017, 05:09 PM
Ne-max's Avatar
Ne-max Ne-max is offline
I like turtles
 
Join Date: Nov 2011
Location: omaha ne
Posts: 2,348

Default

Most guys throw them on hoping it fixes a rail issue caused by bad injectors. Usually start with rail plug. Then lift pump the trucks for sale. I have only had 1 test out bad in the last 4 years. Then fought getting race plug to seal.
__________________
2006 ccsb Lbz Tow rig
2006 rclb 6.6
The fun stuff. Built motor, trans, triples
Reply With Quote
  #11  
Old 06-05-2017, 05:34 PM
Dozerboy's Avatar
Dozerboy Dozerboy is offline
Hotrodder
 
Join Date: Jun 2009
Location: TX of course
Posts: 2,885

Default

I like a little safety factor on a street truck. A truck could become a fire ball real fast if you split something in the fuel system. And injectors aren't cheap if you overpressurized them.


Sent from my iPhone using Tapatalk
__________________

06 GMC 2500 CCSB SLT LBZ 4X4





These views expressed on this post are not my own, but rather randomly generated computer gibberish, and in no way should be used to judge the author's IQ or mental health.
Reply With Quote
  #12  
Old 06-05-2017, 05:44 PM
IOWA LLY's Avatar
IOWA LLY IOWA LLY is offline
Yes, its really me
 
Join Date: Feb 2007
Posts: 1,817
Default

Quote:
Originally Posted by Dozerboy View Post
I like a little safety factor on a street truck. A truck could become a fire ball real fast if you split something in the fuel system. And injectors aren't cheap if you overpressurized them.


Sent from my iPhone using Tapatalk


I totally agree with this statement, however, I honestly don't believe that the pump is capable of making enough pressure to burst anything.

I've tried my share of stupid things, and had some problems over the years on various trucks that caused some wicked high rail pressures, but have never broke anything on an LLY and newer fuel system from to much pressure.

I install a ton of race valves. Never once had an issue. But there is a trick to installing them.


Sent from my iPhone using Tapatalk Pro
__________________
2003 GMC CCSB LLY
Built by me, tuned by me.

2009 ECI Diesel Truck Points Champion
2010 ECI Diesel Truck Points Champion
2011 ECI Diesel Truck Points Champion
2012 ECI Diesel Truck Points Champion

Big thanks to everyone who helps me.

Best 1/8th, 7.29, 98.6MPH (Street tires, fuel only, single Journal bearing GT42 charger) (2010)

Best 1/8th, 6.93, 104.24MPH (Street tires, fuel only, single HX60 turbo) (2016)
Reply With Quote
  #13  
Old 06-05-2017, 05:50 PM
zf>allison's Avatar
zf>allison zf>allison is offline
you never had your car.
 
Join Date: Apr 2013
Location: elsberry mo
Posts: 2,765

Default

I bet I spike pretty high rail going from a fully loaded engine, then just stab the clutch and shift and never let off the throttle. I bet it spikes up pretty good. On the other hand I've never ran dual fuelers, but will be soon.
__________________
04.5 single cab lly zf6 barely not stock.(the jalopy)
05 single cab lly zf6
Arp studs, welded water pump, 100 overs, dual fuelers, s475/87/.90, weighted Dual disc south bend, danville efi live, fass 150, custom single s400 kit,
serious weight reduction
285/60/17 toyo proxes on lmm wheels
Down on 2 leaves, t bolts gone.

best
11.28 at 126 mph, 1.8 60 foot
dynoed 743 hp 5340 raceweight
Instagram-636zf6
Reply With Quote
  #14  
Old 06-05-2017, 06:27 PM
Chevy1925's Avatar
Chevy1925 Chevy1925 is offline
don't know sh!t about IFS

 
Join Date: Oct 2009
Location: Phoenix Az
Posts: 12,896

Default Why use a RACE FUEL VALVE

If you split a line, there won't be anything being sprayed anywhere, MABEY for a split second but nothing but a dribble after that and an engine about to die off cause of it. It would have to be a hell of a tiny hole or split to make it spray with any kind of pressure and I've yet to ever hear of anyone have that happen. The pumps just don't have the volume
__________________
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
Reply With Quote
  #15  
Old 06-05-2017, 06:48 PM
Ne-max's Avatar
Ne-max Ne-max is offline
I like turtles
 
Join Date: Nov 2011
Location: omaha ne
Posts: 2,348

Default

Isn't Mark running 30k plus rail on some of his builds?
__________________
2006 ccsb Lbz Tow rig
2006 rclb 6.6
The fun stuff. Built motor, trans, triples
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 01:37 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
vB.Sponsors