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  1. Join Date
    Nov 2006
    Posts
    45
    #1
    mga idol baka meron kayo ng manual ng 4k engine, baka pwede po pa post ng mga value ng mga sumusunod para maset ko sa tama..

    1) ignition timing = degrees BTDC in relation to respective RPM

    2) valve clearance = INTAKE & EXHAUST

    3) stock jettings = pilot/slow jet, primary & secondary

  2. Join Date
    Feb 2012
    Posts
    605
    #2
    1) ignition timing = 52 degrees BTDC

  3. Join Date
    Feb 2009
    Posts
    5,130
    #3
    Quote Originally Posted by sotel View Post
    1) ignition timing = 52 degrees BTDC



    i doubt any engine will run at this ignition timing, not even the computer controlled ignition. some ignition system go as high as 36 degrees at higher revs. when you check igniton timing, it is set at idle speed with electronic spark advance disabled or both the vacuum and centrifugal advance disabled.please check again.

  4. Join Date
    Feb 2009
    Posts
    5,130

  5. Join Date
    Feb 2009
    Posts
    5,130
    #5
    try 7 degrees BTDC first and test drive, if memory serves me right it is between 7 to 9 degrees BTDC at idle with vacuum and centrifugal advancers disabled

  6. Join Date
    Feb 2009
    Posts
    5,130
    #6
    Tech:Engine/K Series/How to build a tough K motor - Rollaclub


    in this website, the factory ignition timing is at 8 degrees BTDC

  7. Join Date
    Feb 2012
    Posts
    605
    #7
    Quote Originally Posted by jick.cejoco View Post
    i doubt any engine will run at this ignition timing, not even the computer controlled ignition. some ignition system go as high as 36 degrees at higher revs. when you check igniton timing, it is set at idle speed with electronic spark advance disabled or both the vacuum and centrifugal advance disabled.please check again.
    iba pala nasabi ko hehe

  8. Join Date
    Feb 2009
    Posts
    5,130
    #8
    Quote Originally Posted by sotel View Post
    iba pala nasabi ko hehe


    you might have been talking about ignition points dwell angle. 360 degrees divided by number of cylinders multiplied by 60% +/- 2 degrees

  9. Join Date
    Feb 2012
    Posts
    605
    #9
    ah un nga sir heheh

  10. Join Date
    Jan 2011
    Posts
    642
    #10
    i used to have this engine on my owner jeep before. bulletproof engine, as in matibay. medyo advanced ang timing ko dito, 10 BTDC. ang valve clearance ko, parehas lang ang i/e at 8. ang jet ko naman 80/95. hope this helps.

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4k engine valve clearance, idle speed, ignition timing