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F head hop up debate on exhaust

Discussion in 'Early CJ5 and CJ6 Tech' started by Thunderpig, Jul 25, 2008.

Page 2 of 2
  1. Jun 19, 2009
    Lifesgoodhere

    Lifesgoodhere Like 6 Jeeps isn't enough

    Staunton, Virginia
    Joined:
    Feb 14, 2009
    Messages:
    265
    ride a 12 hp ridine mower, then ride a 18 hp riding mower...which gave you the nicer lawn?

    I believe the valve overlap angle is about 110* (might be 112*, don't Have my book in front of me) 110 is just about perfect. If it were 108* it would have lots of low end power like a diesel, and if it were say 115* it would have more high end power like a Honda...
     
    Lifesgoodhere, Jun 19, 2009
    #21
  2. Jun 19, 2009
    blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    Portland Tn.
    Joined:
    Sep 20, 2002
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    4,350
    Pretty much the only way to change valve overlap is to grind a cu$tom cam.......no?
     
    blevisay, Jun 19, 2009
    #22
  3. Jun 19, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Sep 22, 2002
    Messages:
    8,360
    I'd guess, unless you could alter it slightly with rocker arm ratios...But there again, I doubt anyone makes anything but stock.
     
    Patrick, Jun 19, 2009
    #23
  4. Jun 19, 2009
    Lifesgoodhere

    Lifesgoodhere Like 6 Jeeps isn't enough

    Staunton, Virginia
    Joined:
    Feb 14, 2009
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    265
    Clifford Performance will custom grind a hotter cam for about $600. I looked into it. Not worth it for me. though its brobbly an instant 25 HP and who knows hot much ft-lbs, not to mention a whole new power curve.
     
    Lifesgoodhere, Jun 19, 2009
    #24
  5. Jun 20, 2009
    blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    Portland Tn.
    Joined:
    Sep 20, 2002
    Messages:
    4,350
    There are other cam grinders.
     
    blevisay, Jun 20, 2009
    #25
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