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TR65 cams

Discussion in 'Triumph (Classic)' started by Fast Eddie, Jul 11, 2019.

  1. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Chaps (and chapesses),

    Does anyone know what cams, and cam timing, were used in the late model short stroke TR65 Thunderbird engines?
     
  2. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
    There were no specific camshafts for the TR65 according to the '82 parts book (so same as T140, 71-7016 & 71-7017).

    TR65 valve timing according to the manual "CHECKED WITH NIL TAPPET CLEARANCE AT T.D.C.":
    Inlet - 0.151"/ 3.83mm
    Exhaust - 0.088" / 2.23mm
     
  3. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Thanks LAB.
     
  4. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
    Also, according to the factory manual, the standard TR65* cam wheel marks are:
    Inlet cam wheel dot aligns with intermediate dash.
    Exhaust 'X' aligns with intermediate dot.

    *Edit (Not TR65T)
     
  5. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    What was the difference with the TR65T? Different timing or different cams?
     
  6. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
  7. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Aha... I’m familiar with that cam, it’s somewhat like a higher lift 3134 profile. Makes sense. Thanks again LAB.
     

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