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Timing, Was: SU performance tuning... 1800

posted by Bennie on Mon Feb 28 21:28 CST 2005
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last visit: Wed Nov 28 03:03 CST 2007

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Point is, the old "advance until it pings and then back off slightly" method may or may not pertain to any particular motor.

Very true indeed, people tend to do all kinds of things to be able to run more advanced ignition timing, which is some cases will just be counter affective.

You need the burn to complete as the piston reaches about 10 degrees ATDC.

10 degrees? I would say you'd want peak presure at the point where rod vs crank-big-end-line is 90 degree, so you have maximum leverage. This is more then 10 degree and varies with different rod-stroke ratios. And offcourse peak presure again depends on burn rate which also depends on lots of variables, and oh, rpm offcourse, which is where the advance curve comes in. Anyway, why 10 degrees?

ben
--
P131, '65, B20B+M47. P131, '69, B20E+AW71L+LSD. (www.tinustechniek.tk)

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SU performance tuning... [1800]
posted by KLR142 on Mon Feb 28 09:19 CST 2005 >

SU performance tuning... [1800]
posted by Phil S. on Mon Feb 28 09:44 CST 2005 > V
- Timing, Was: SU performance tuning... [1800]
  posted by garyetie on Mon Feb 28 10:08 CST 2005 > V
  - Timing, Was: SU performance tuning... [1800]
    posted by Phil S. on Mon Feb 28 10:32 CST 2005 > V
    - Timing, Was: SU performance tuning... [1800]
      posted by Bennie on Mon Feb 28 21:28 CST 2005 > V
      - Timing, Was: SU performance tuning... [1800]
        posted by Phil S. on Tue Mar 1 05:54 CST 2005 > V
  - Timing, Was: SU performance tuning... [1800]
    posted by JohnMc on Mon Feb 28 10:34 CST 2005 > V
- SU performance tuning... [1800]
  posted by KLR142 on Mon Feb 28 12:46 CST 2005 > V
  - SU performance tuning... [1800]
    posted by Phil S. on Mon Feb 28 13:32 CST 2005 > V
    - SU performance tuning... [1800]
      posted by KLR142 on Mon Feb 28 13:57 CST 2005 > V

SU performance tuning... [1800]
posted by jparker3 on Mon Feb 28 15:47 CST 2005 > V
- SU performance tuning... [1800]
  posted by KLR142 on Mon Feb 28 16:30 CST 2005 > V
  - SU performance tuning... [1800]
    posted by jparker3 on Tue Mar 1 01:57 CST 2005 > V
    - SU performance tuning... [1800]
      posted by KLR142 on Thu Mar 3 00:31 CST 2005 > V
  - SU performance tuning... [1800]
    posted by Phil S. on Tue Mar 1 05:39 CST 2005 > V
- SU performance tuning... [1800]
  posted by Bennie on Mon Feb 28 21:34 CST 2005 > V
  - SU performance tuning... [1800]
    posted by jparker3 on Tue Mar 1 01:43 CST 2005 > V
  - SU performance tuning... [1800]
    posted by Phil S. on Tue Mar 1 05:46 CST 2005 > V
    - SU performance tuning... [1800]
      posted by Bennie on Tue Mar 1 06:07 CST 2005 > V
      - SU performance tuning... [1800]
        posted by someone claiming to be Rhys on Fri Mar 4 19:01 CST 2005 > V

SU performance tuning... [1800]
posted by CyaLater on Mon Feb 28 19:22 CST 2005 > V
- SU performance tuning... [1800]
  posted by jparker3 on Tue Mar 1 03:49 CST 2005 > V
  - SU performance tuning... [1800]
    posted by CyaLater on Sat Mar 5 14:01 CST 2005 > V
- SU performance tuning... [1800]
  posted by KLR142 on Thu Mar 3 00:35 CST 2005 > V
  - SU performance tuning... [1800]
    posted by CyaLater on Sat Mar 5 13:43 CST 2005 > V
    - SU performance tuning... [1800]
      posted by KLR142 on Sat Mar 5 14:23 CST 2005 > V
      - SU performance tuning... [1800]
        posted by CyaLater on Sat Mar 5 18:57 CST 2005 > V
        
        SU performance tuning... [1800]
        posted by KLR142 on Sat Mar 5 20:08 CST 2005 > V
        
        SU performance tuning... [1800]
        posted by CyaLater on Sat Mar 5 22:27 CST 2005 > V
        
        SU performance tuning... [1800]
        posted by KLR142 on Sun Mar 6 08:54 CST 2005 > V
        
        SU performance tuning... [1800]
        posted by Phil S. on Sun Mar 6 09:32 CST 2005 > V
        
        SU performance tuning... [1800]
        posted by JohnMc on Sun Mar 6 09:43 CST 2005 > V
        
        Vacuum [1800]
        posted by Phil S. on Sun Mar 6 10:16 CST 2005 > V
        
        SU performance tuning... [1800]
        posted by KLR142 on Sun Mar 6 12:32 CST 2005 > V
        
        SU performance tuning... [1800]
        posted by Phil S. on Sun Mar 6 12:41 CST 2005 > V
        
        good deal =D thanks again! (NT) [1800]
        posted by KLR142 on Sun Mar 6 13:12 CST 2005 > V
        
        good deal =D thanks again! (NT) [1800]
        posted by jparker3 on Mon Mar 7 10:52 CST 2005 > V
        
        good deal =D thanks again! [1800]
        posted by KLR142 on Mon Mar 7 21:34 CST 2005 > V
        
        good deal =D thanks again! [1800]
        posted by jparker3 on Thu Mar 10 03:50 CST 2005 > V
        
        good deal =D thanks again! [1800]
        posted by KLR142 on Thu Mar 10 08:50 CST 2005 > V
        
        good deal =D thanks again! [1800]
        posted by JohnMc on Thu Mar 10 09:13 CST 2005 > V
        
        There is nothing hooked up to my dizzy, no vacuum nothing =D (NT) [1800]
        posted by KLR142 on Thu Mar 10 09:23 CST 2005 > V
        
        SU performance tuning... [1800]
        posted by CyaLater on Mon Mar 7 19:00 CST 2005 > V

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Timing, Was: SU performance tuning... 1800