Results 1 to 10 of 10

Fuel Management Units

This is a discussion on Fuel Management Units within the Forced Induction forums, part of the LSx Technical Help Section category; Does Anybody Know What Size Fmu I Should Use For A P6oob Procharger On A Sbc W/ 8 Lbs Of ...

  1. #1
    Junior Member
    Join Date
    Sep 2006
    Location
    COLORADO
    Posts
    39

    Fuel Management Units

    Does Anybody Know What Size Fmu I Should Use For A P6oob Procharger On A Sbc W/ 8 Lbs Of Boost, I've Heard Any Where From A 4:1 To A 16:1 And Now I Really Dont Know Wich One Is Best.

  2. #2
    ;) Packy's Avatar
    Join Date
    Apr 2001
    Location
    Surf City, NC
    Posts
    2,503

    Black/Screaming Yellow
    99 S/C TA WS6 & 04 Cobra

    I don't know I don't use my FMU.

  3. #3
    Junior Member
    Join Date
    Jul 2006
    Location
    Newport KY
    Age
    32
    Posts
    80

    Red
    1995 Chevy Camaro

    I dont run a FMU either. If you get one, just make sure its adjustable. You can find em on ebay all day long for $100. If you get a good tune on your car you wont need a FMU at all.

  4. #4
    Junior Member
    Join Date
    Sep 2006
    Location
    COLORADO
    Posts
    39
    Cool, Thanx For The Advice Guys!

  5. #5
    Junior Member
    Join Date
    Sep 2006
    Location
    BosserCity,LA
    Age
    34
    Posts
    7
    I just wanted to second on what evilLT4 said. If you are able to tune your car you wont need the FMU. It's basically a rising rate fuel pressure regulator. As boost increases so does the fuel pressure. So if you get it tuned your fuel trims will automatically supply the fuel needed so a FMU wont be needed. I think they are a waste of money IMO.

  6. #6
    Junior Member
    Join Date
    Sep 2006
    Location
    COLORADO
    Posts
    39
    Yeah, That Sounds Like The Same Thing Other People Are Tellin Me, Thanx Again 4 Tha Info!

  7. #7
    Junior Member
    Join Date
    Sep 2006
    Location
    COLORADO
    Posts
    39
    What Size Injectors Are You Guys Runnin? I Have 29# Inj. On The Edelbrock Proflo Mpfi, I Hear Tha System Is Good Upto 550 H.p. But I'm Still Wonderin If I Need Bigger Ones Or Not (instead Of Mfu)?

  8. #8
    Junior Member
    Join Date
    Sep 2006
    Location
    BosserCity,LA
    Age
    34
    Posts
    7
    I'm not sure if the chart is accurat or not but if I'm not mistaken 28# injectors are good for 407hp and 30# are good for 436hp this is crank hp. For 550hp you would need about a 38# injector.

  9. #9
    Junior Member
    Join Date
    Sep 2006
    Location
    COLORADO
    Posts
    39
    I've Talked To Other People Running The Same Mpfi System W/29# Inj. That Say They Are Getting 480 To 500+ Rwhp & If I Wanna Go Over That Then I'll Hafta Change Inj. & I Dont Know About "the Chart" Your Using, Wich Chart Is That Anyway?

  10. #10
    Junior Member
    Join Date
    Sep 2006
    Location
    BosserCity,LA
    Age
    34
    Posts
    7
    cool, if they are hitting that then obviously the numbers on "the chart" are off. Now "the chart" i'm using is for turbo cars so it may be a bit diffrent.

    http://www.turbonation.com/injector.htm

    Here is a conversion tool that says the same thing
    http://www.injector.com/injectorselection.php

    http://www.moddedmustangs.com/perfor...culators/#disp
    another as well.

    All of these charts/calculators are looking like if you want to touch 500whp your gonna need 30+# injectors now that also depends on what duty cycle your willing to run. 80% is the highest recommened by most tuners to run safely. The stock injectors (29#) are good for 390hp at 80% duty cycle which is the industry standard if your willing to exceed that and run 100% duty cycle then you can hit about 475hp. It's up to you what you want to do and how far you are willing to push the limits of your stock fuel system.

    I'm only quoting the formula's alot of times people get away with disproving what is known to be true so. Hopefully others will chime in with there personal expreince on the subject.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. C4 Upgrade Air Management to Improved Fuel Deliver
    By Ed Blown Vert in forum Corvette
    Replies: 0
    Last Post: 04-27-2010, 06:50 AM
  2. Who knows their Head units?
    By suede in forum Stereo and Electronics
    Replies: 21
    Last Post: 09-14-2009, 10:05 PM
  3. which head units?
    By bluefields88 in forum Stereo and Electronics
    Replies: 6
    Last Post: 01-19-2008, 11:08 AM
  4. DVD units
    By deception05 in forum Stereo and Electronics
    Replies: 11
    Last Post: 10-13-2005, 10:26 PM
  5. Stand Alone Fuel Management for LS-1?
    By MaxPlusTen in forum Computer & Tuning
    Replies: 3
    Last Post: 09-20-2005, 06:44 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •