Someone explain this to me (fuel pressure regulator) - LS1TECH

Go Back   LS1TECH > LS1-LS2-LS3-LS6-LS7 PERFORMANCE > Fueling & Injection
Log In 
Search


Fueling & Injection
Fuel Pumps | Injectors | Rails | Regulators | Tanks


Someone explain this to me (fuel pressure regulator)

Reply
 
Thread Tools Search this Thread
Old 11-21-2009, 10:28 PM   #1
TECH Veteran
 
dhdenney's Avatar
 
Trader Rating: 53
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,436
Send a message via AIM to dhdenney Send a message via MSN to dhdenney
Default Someone explain this to me (fuel pressure regulator)

Never claimed to be very smart but how does this work if the pressure isn't regulated before it goes into the rails?

Click the image to open in full size.
__________________
*2012 Audi A3 TDI, Premium Plus, DSG, Ibis white
*1994 Pontiac Firebird Formula, Gt47-80 turbo, 580 rwhp/700 rwtq
*2004 Jeep Liberty Sport 4X4
dhdenney is offline   Reply With Quote
Old 11-21-2009, 11:44 PM   #2
LS1Tech Sponsor
 
FICINJECTORS's Avatar
 
Trader Rating: 30
Join Date: Sep 2008
Location: Cumming, Ga
Posts: 1,256
Default

Quote:
Originally Posted by dhdenney View Post
Never claimed to be very smart but how does this work if the pressure isn't regulated before it goes into the rails?

Click the image to open in full size.
the regulator releases at the set pressure so the whole input line from the pump to the end is the same pressure,,Its simple as soon as the pressure in the line reaches the set pressure the reg dumps the fuel back to the tank, but the input line has constant pressure
FICINJECTORS is offline   Reply With Quote
Old 11-22-2009, 07:54 AM   #3
TECH Veteran
 
dhdenney's Avatar
 
Trader Rating: 53
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,436
Send a message via AIM to dhdenney Send a message via MSN to dhdenney
Default

Quote:
Originally Posted by FICINJECTORS View Post
the regulator releases at the set pressure so the whole input line from the pump to the end is the same pressure,,Its simple as soon as the pressure in the line reaches the set pressure the reg dumps the fuel back to the tank, but the input line has constant pressure
OK I guess I see that. I had bought this regulator used with no instructions and was looking on their site and found the .PDF. I just had it in mind there was an "in," a "to rails," and the return.
__________________
*2012 Audi A3 TDI, Premium Plus, DSG, Ibis white
*1994 Pontiac Firebird Formula, Gt47-80 turbo, 580 rwhp/700 rwtq
*2004 Jeep Liberty Sport 4X4
dhdenney is offline   Reply With Quote
Old 11-24-2009, 08:53 AM   #4
Teching In
 
NobodyIsSlowerThanMe's Avatar
 
Trader Rating: 0
Join Date: Oct 2009
Location: in the dust of lsx swapped rx7s
Posts: 8
Default

Just so you know, to fine tune the fuel pressure:
Be sure the to adjust it while the car is idling but take the reference vacuum line off.
That's your static pressure, and that's the pressure you'll want to adjust for.
NobodyIsSlowerThanMe is offline   Reply With Quote
Old 11-24-2009, 09:03 AM   #5
TECH Regular
 
BLOWNBLUEZ06's Avatar
 
Trader Rating: 17
Join Date: Mar 2007
Location: Forney, Texas
Posts: 423
Default

Quote:
Originally Posted by NobodyIsSlowerThanMe View Post
Just so you know, to fine tune the fuel pressure:
Be sure the to adjust it while the car is idling but take the reference vacuum line off.
That's your static pressure, and that's the pressure you'll want to adjust for.
Don't use the vacuum reference unless you retune the car. You'll need to change the IFR table if you decide to use vacuum referencing. I see no need to use it unless you're running boost.
__________________
H Squared Racing RHS 427, Dallas Performance F2, MAST LS7 heads with Titanium valves, BTR springs and camshaft, billet Diamond pistons, Moran 275lb injectors. Assembled and tuned by yours truly.
-Scott Evans
I spend my money on Car Parts and Race Gas... The Rest I waste...
BLOWNBLUEZ06 is offline   Reply With Quote
Old 11-24-2009, 09:18 AM   #6
Teching In
 
NobodyIsSlowerThanMe's Avatar
 
Trader Rating: 0
Join Date: Oct 2009
Location: in the dust of lsx swapped rx7s
Posts: 8
Default

Good point.
I'm used to turbo cars..lol.

Last edited by NobodyIsSlowerThanMe; 11-24-2009 at 05:08 PM. Reason: grammatical error
NobodyIsSlowerThanMe is offline   Reply With Quote
Old 11-24-2009, 06:53 PM   #7
TECH Veteran
 
dhdenney's Avatar
 
Trader Rating: 53
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,436
Send a message via AIM to dhdenney Send a message via MSN to dhdenney
Default

It's turbo. After looking at some pictures in the fueling section, this setup looks pretty common. Thanks for the responses guys.
__________________
*2012 Audi A3 TDI, Premium Plus, DSG, Ibis white
*1994 Pontiac Firebird Formula, Gt47-80 turbo, 580 rwhp/700 rwtq
*2004 Jeep Liberty Sport 4X4
dhdenney is offline   Reply With Quote
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
Belt PN for smokinhawk alternator bracket dhdenney Forced Induction 2 03-16-2009 09:53 PM
Anybody done their rear brake lines all the way from distribution block to caliper? dhdenney LT1-LT4 Modifications 23 03-02-2009 07:42 PM
Smallest turbo oil return line with scavenge pump dhdenney Forced Induction 2 12-29-2008 05:37 AM
Throttle cable dhdenney Conversions & Hybrids 7 12-20-2008 04:15 PM
Why are my torque converter bolts so short? dhdenney Automatic Transmission 1 08-14-2005 11:52 AM


Tags
2004, 94, explain, fuel, input, jeep, jetta, ls1, ls1tech, ls2, ls3, mini, pressure, regulator, tdi

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are On
Refbacks are Off


 

All times are GMT -5. The time now is 08:37 PM.