AFR

  1. Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)
    #1
    No idea about this kind of thing, What should it be around?

    Printout from RR below,
  2. Frequent Poster Joined: Oct 2005 Posts: 751
    #2
    max power is usually around lambda = 0.9. Yours is running closer to 0.95 (depending on fuel spec) so it is a tad lean however not enough to cause any engine damage
  3. Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)
    #3
    Anyone else?
  4. Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.
    #4
    Sure the rule is 14 parts air 1 part fuel is 'optimum' so 14:1.

    This was a good read - http://autospeed.com/cms/title_Tunin...5/article.html
  5. Established Member Joined: Oct 2004 Warrington Posts: 1987 AX VTS 57 3.0 TDI A5
    #5
    Quote:
    Originally Posted by saxova View Post
    Sure the rule is 14 parts air 1 part fuel is 'optimum' so 14:1.

    This was a good read - http://autospeed.com/cms/title_Tunin...5/article.html
    Optimum mixture isnt best for peak power
    1 user thanked this post:
  6. Frequent Poster Joined: Oct 2005 Posts: 751
    #6
    lambda 1 is best for economy, cat light off time, combustion stability, overall emission etc... but as said peak BMEP is often closer to lambda = 0.9
  7. Saxperience Forum Bum Joined: Dec 2008 Gloucester Posts: 3000 Citroen Saxo VTR Renault 5
    #7
    AFR is air fuel ratio. This is 14.7:1 (officially known as the stoichiometric ratio if you wanted to know )