Results 1 to 7 of 7
  1. #1
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default Fuel pressure / flow rate / bhp equation.

    Does anyone have a rough rule of thumb for a fuel flow rate against possible bhp calculation?

    i.e. for 100bhp you need x liters of fuel per hour.

    Obviously its not going to give you an exact figure, I just need a ballpark.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  2. #2
    Join Date
    Dec 2012
    Location
    Switzerland
    Posts
    33
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    I think it's to difficult without information about the motor (i think you mean the 2.0 turbo) for a theoretic setting you need a lot of parameters.. Injectors, Lambda, etc... A lot more..

    Greets

  3. #3
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    This is just for a standard 2.0L Alfa twincam, so no lambda and carbs.

    I just want to make sure that the pump I'm hoping to use can supply enough juice.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  4. #4
    Join Date
    May 2009
    Location
    Melbourne
    Posts
    187
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    It depends on the brake specific fuel consumption (BSFC) of the engine.

    Turbos have a higher BSFC than N/A.

    The rough guide was from memory 4.5-6.5cc/min per HP depending on the BSFC.

  5. #5
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    Cheers for those figures, should be able to get a rough estimate of the flow needed from them.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  6. #6
    Join Date
    Apr 2012
    Location
    Pretoria, South Africa
    Posts
    131
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    I read somewhere that you need 6.5 cc/kW. My favourite dyno tuner for turbo cars is active in drag racing and do a lot of turbo modification, and his rule of thumb is 550cc/100hp on the wheels.

  7. #7
    Join Date
    Mar 2014
    Location
    Bulgaria
    Posts
    102
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    The rule of thumb that I know for injectors size vs horse power rating is:
    ( <max injector flow in cc/min> / 5 ) x <numbers of injectors>
    Here is the link, from which I have read this -> link.
    This is close to mentioned by SteveNZ and corriedw, just different representations. Their figures are for single injector. So for 1 hp: 1 = <injector size>/5 => injector size=5 cc/min.

Similar Threads

  1. Fuel Pressure gauge : Install
    By Steve Webb in forum Alfa Romeo Q4 Tech.
    Replies: 5
    Last Post: 14-03-11, 10:18
  2. Electronic fuel pressure gauge.
    By Steve Webb in forum Alfa Romeo Q4 Tech.
    Replies: 3
    Last Post: 02-03-11, 19:14
  3. Fuel pressure
    By jimnielsen in forum Alfa Romeo Q4 Tech.
    Replies: 3
    Last Post: 21-04-10, 12:46
  4. Boost control
    By Evodelta in forum Alfa Romeo Q4 Tech.
    Replies: 30
    Last Post: 29-09-08, 07:30
  5. Fuel Pressure gauge
    By Steve Webb in forum Alfa Romeo Q4 Tech.
    Replies: 3
    Last Post: 16-05-07, 10:16

Tags for this Thread

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
  •