Go back to home

FR33 kent cam what timing are people running.

Author
war
Enthusiast
  • Total Posts : 106
  • Scores: 1
  • Reward points: 3960
  • Joined: 2011/08/01 11:02:49
  • Location: Perth
  • Status: offline
2014/02/03 18:36:22 (permalink)
0

FR33 kent cam what timing are people running.

is the old rule of advance till it pings ok is that a bad idea?
engine build
10.5:1
ported head
twin 44idfs webers
pacemaker bore bore extractors
H&H dissy (no vac advance)
fr33 kent cam kit.
 
#1


6 Replies Related Threads

    Drewdog
    Deity
    • Total Posts : 1028
    • Scores: 118
    • Reward points: 5323
    • Joined: 2013/03/06 22:31:01
    • Status: offline
    Re: FR33 kent cam what timing are people running. 2014/02/03 19:32:17 (permalink)
    0
    Hey there War,
    Can't help with the timing but have a question, is the IDF manifold from Palmside? If so does it have a vacumn outlet for the brake booster?
    Cheers Drew........

    GT Cortina Project "The Ugly Duckling"
    #2
    war
    Enthusiast
    • Total Posts : 106
    • Scores: 1
    • Reward points: 3960
    • Joined: 2011/08/01 11:02:49
    • Location: Perth
    • Status: offline
    Re: FR33 kent cam what timing are people running. 2014/02/03 20:20:18 (permalink)
    0
    yes i got the rejetted 44 idfs carbs on the manifold, i drilled and tapped on number 3 round knob thingy, i can take a pic, if you want. I ran the heater hose to the head take off pipe back to the radiator. Just got it running on the week end.
    #3

    Drewdog
    Deity
    • Total Posts : 1028
    • Scores: 118
    • Reward points: 5323
    • Joined: 2013/03/06 22:31:01
    • Status: offline
    Re: FR33 kent cam what timing are people running. 2014/02/03 23:46:18 (permalink)
    0
    Ok cheers for that. Sorry to hijack the thread, back to the timing....................

    GT Cortina Project "The Ugly Duckling"
    #4
    Johnscapris
    Enthusiast
    • Total Posts : 98
    • Scores: 5
    • Reward points: 5609
    • Joined: 2011/08/01 11:02:49
    • Location: Morayfield Qld Australia
    • Status: offline
    Re: FR33 kent cam what timing are people running. 2014/02/05 09:33:13 (permalink)
    0
    Install the cam at the timing as specified on the spec sheet.  Dyno tests with this cam advanced and retarted 4 degrees, clearly show torque (HP) decreases with these timing changes.
    Hope this data assists with your timing choices.
     
    Regards
    John
    #5
    martymexico
    Deity
    • Total Posts : 2426
    • Scores: 274
    • Reward points: 5829
    • Joined: 2011/08/01 11:02:49
    • Location: Adelaide Sth Aust Australia
    • Status: offline
    Re: FR33 kent cam what timing are people running. 2014/02/05 18:44:20 (permalink)
    0
    I didn't have a fr33 cam in my motor yrs ago I had a Piper bp320 prolly very similar performance tho, I went with the 112°(I think) full lift as in spec sheet and dizzy timing worked best at 2° btdc. This engine was producing 109kw@wheels at 8900rpm Running twin 40dcoe with 36 chokes. Sold the head to a historic race driver many yrs ago. Hope this helps
    #6

    gazz
    Enthusiast
    • Total Posts : 139
    • Scores: 2
    • Reward points: 4043
    • Joined: 2011/08/01 11:02:49
    • Location: Adelaide S.A Australia
    • Status: offline
    Re: FR33 kent cam what timing are people running. 2014/02/05 21:45:18 (permalink)
    0
    depends when it is pinging? your probably going to ping all the time if you run bad fuel, or you put in 4th to labour up a hill in low revs. optimum ignition timing varies greatly from engine to engine.
    pinging is bad, and if you do it for too long you are going to put a nice hole in a piston or do some kind of damage. but if you advance it till it pings and then retard it a bit till it goes away, you should be fine, depending on how far you have to retard it of course.
     
    dynos are great for doing ignition timing, and you can change springs to alter advance curves easily id highly recommend it. too much advance on the static timing is going to make it harder to start also.
     
    my ignition timing which i setup on the dyno is pretty well standard as thats what worked best for my engine.
    im running 11:1 on 45's with a bf63 cam.
    #7
    Jump to:
    © 2025 APG vNext Trial Version 5.1