Announcement

Collapse
No announcement yet.

Let's talk timing

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Let's talk timing

    I've heard conflicting opinions on optimum timing advance under difference load conditions. Let's post up or share what your experiences are with spark timing.

    I'm curious if anyone knows what the timing advance is on a stock NA and GTX ECU.

    #2
    I'm currently working on an article/post discussing this very issue. I could put it in here if you'd like.

    It covers the actual reasons for why an engine needs ignition advance, the issue of whether more advance is better or not, and an explanation for why you need less advance with boost.
    Ask me about engine management!

    Comment


      #3
      Sure, post it up Matt. I read that the EVO runs 21-23 degrees of advance at WOT under full boost at redline.

      Of course this is not directly applicable to every motor, but it does show a glimpse of what an OEM setup is like.

      Comment


        #4
        [article cut out and moved to sticky thread "What does ignition timing really mean?"]
        Last edited by matt_fulghum; 06-27-2007, 02:44 PM.
        Ask me about engine management!

        Comment


          #5
          once you finish that writeup... i think it would be a good idea to post it as a new thread and make it a sticky
          Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
          ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
          Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

          Comment


            #6
            do you want me to move it to a new thread to keep it clean? that might be a good idea... tell me what you think of the article so far and I can just delete this thread in the interest of keeping the subforum clean.
            Ask me about engine management!

            Comment


              #7
              Matt, let's say the cylinder pressures are doubled above your figure of 1 BAR (so we are running 30psi). Do you know the kind of curve or equation we should use to determine what the maximum advance should be.

              Comment


                #8
                the article looks good so far... i'd say keep this thread around but copy the article in its complete form and make a new thread/sticky out of it.
                Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
                ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
                Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

                Comment


                  #9
                  I created a stickied thread with the article in it... let's move technical discussion into it.
                  Ask me about engine management!

                  Comment


                    #10
                    Originally posted by Lex View Post
                    Matt, let's say the cylinder pressures are doubled above your figure of 1 BAR (so we are running 30psi). Do you know the kind of curve or equation we should use to determine what the maximum advance should be.
                    could you repost this question in the other thread?
                    Ask me about engine management!

                    Comment

                    Working...
                    X