Important! : fuel pressure regulator for throttle bodies

1. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #1 1st October 2009, 18:58

   Right i got myself some AT power throttle bodies,
   
   i will be running them with PH3 cams
   
   just a few question, am i right in guessing that a vtr FPR will fit on the standard vts fuel rail?
   
   as i know that someone else with AT power throttle bodies and 708 with standard injectors is hitting 100% duty!!
   
   so if i got a vtr FPR will that help with the fueling duty?!
   
   thanks
   
   andy
2. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #2 1st October 2009, 21:25

   anyone?
   
   just want a few answer
   
   andy
3. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #3 1st October 2009, 21:26

   bigger injectors
4. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #4 1st October 2009, 21:35

   yer i know that one way, but that not what i am asking!! lol
   
   i wanted to asee if increasing the fuel pressure regulator pressure will that help with the duty!!
   
   as i was told but a few poeple on here that vts injectors are good for 180 bhp!!!
   
   also i asked john at gmc he also told me that the vts standard injectors should be ok for my set up,
   
   but i was told today that some one else on sort of the same spec hit 100% duty!!
   
   andy
5. willsy West Midlands Joined: Nov 2005 Nuneaton (West Mids) Posts: 13835 '64 Volvo V40 R’Design, '89 Ph1 309 GTi, ‘97 Mk1 S

   #5 1st October 2009, 22:00

   Andy i have the 3.5bar VTR FPR in my fuel rail currently (VTS one is less at 3bar)
   
   Its direct fit as the shape/housing is exactly the same size
   
   Im running larger injectors on mine aswel which i got from GMC
   
   Hope that helps
   
   PS You have a PM
6. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #6 2nd October 2009, 07:09

   thanks, i am wanting to know if a bigger FPR will help me getting a better duty on the injectors?
   
   i will be ring gmc today to talk to them.
   
   thanks
   
   andy
7. saxo_ron Saxperience Forum Bum Joined: Jun 2007 Newcastle Upon Tyne Posts: 3017 Honda DC5, Gruppe M and j's racing

   #7 2nd October 2009, 07:58

   If the injectors are already maxxd surely a bigger fpr won't make a difference
8. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #8 2nd October 2009, 08:08

   yer could be rite mate, thanks for replying.
   
   andy
9. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #9 2nd October 2009, 08:09

   yer could be rite mate, thanks for replying.
   
   andy
10. AT_Power L-plater Joined: Jan 2009 Norwich Posts: 54 Nissan Skyline

    #10 2nd October 2009, 10:42

    Going from 3.0Bar to 3.5Bar should bring the 100% duty down to 90% by my calculations at 180bhp.
    
    If the standard VTS injectors are 220cc then I agree my calcs say you will max out around 180bhp.
    
    You can actually crimp down on an FPR to increase the fuel pressure it holds, but I wouldn't reccomend that unless you know what you're doing.
    
    Clio 172/182 injectors are 250cc of course and would be a good upgrade when used with a 3.5Bar FPR would be good for 200bhp.
11. pjm300 Saxperience Forum Bum Joined: Jun 2005 Potters Bar United Kingdom (England) Posts: 2749 T/B'd VTS

    #11 2nd October 2009, 10:51

    if someone is hitting 100% duty with 708's then i'd check their fuel filter
12. AT_Power L-plater Joined: Jan 2009 Norwich Posts: 54 Nissan Skyline

    #12 2nd October 2009, 10:54

    Fuel filter is a good place to start. And I don't know whether the fuel pumps wear themselves out or not.
    
    I'd be very impressed if people were hitting 180bhp with just throttles and cams. Seems like it should be closer to 165bhp area from those who have given me feedback.
13. pjm300 Saxperience Forum Bum Joined: Jun 2005 Potters Bar United Kingdom (England) Posts: 2749 T/B'd VTS

    #13 2nd October 2009, 10:56

    indeed
14. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

    #14 2nd October 2009, 11:49

    ring thanks for the info.
    
    yer i rang gmc and was told that if i increase the fpr on standard injector that would help!
    
    i am only using ph3 and bodies so wil onlw be bout 160 at a push so a vtr fpr should do it.
    
    they told to get the 4.5 one with standard injectors should be ok with the duty.
    
    i am having my injectors cleaned and have a new fuel filter!
    
    thanks
    
    andy
15. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

    #15 2nd October 2009, 11:49

    ring thanks for the info.
    
    yer i rang gmc and was told that if i increase the fpr on standard injector that would help!
    
    i am only using ph3 and bodies so wil onlw be bout 160 at a push so a vtr fpr should do it.
    
    they told to get the 4.5 one with standard injectors should be ok with the duty.
    
    i am having my injectors cleaned and have a new fuel filter!
    
    thanks
    
    andy
16. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #16 2nd October 2009, 11:49

    180hp on 708s????