Noob Cam Question

Discussion in 'Fox 5.0 Mustang Tech' started by Strype, Jun 30, 2013.


  1. Strype

    Strype Cuthbert catcher Founding Member

    Joined:
    May 11, 1999
    Messages:
    2,714
    Likes Received:
    371
    Trophy Points:
    104
    Location:
    Huntsvegas, AL
    I have no shame...

    So what should a b303 feel like? What should my timing be set at?

    I've read advanced all the way, I've read stock timing. It shakes the whole frikin car and backfires until warm at 14 degrees.

    I've never had a cammed car before. Should it shake enough to see the motor shake, the gear shifter shake, and rattle the interior at idle? As in I can feel it in the seat. The hood moves when it's up. I need to know so I can smooth it out if it needs it. I've been searching youtube but everyone posts videos of their exhaust pipes.
    #1
  2. f8tlfiveo

    f8tlfiveo My wife likes my spool and blow-off valve.

    Joined:
    Aug 9, 2007
    Messages:
    1,421
    Likes Received:
    74
    Trophy Points:
    49
    Location:
    Lancaster, PA
    Did you replace just the cam? If so is the distributor in correctly, if it is out 180* it will still run, but not right. I would say with the timing to start at stock and move it up a couple degrees until it feels right. I have never ran my cars more than 13*
    #2
  3. madmike1157

    madmike1157 the humor is still lost on me SN Certified Technician

    Joined:
    Nov 30, 1999
    Messages:
    3,808
    Albums:
    1
    Likes Received:
    928
    Trophy Points:
    154
    Location:
    Birmingham, al
    There is a difference between the way a car runs w/ a more radical cam and a car that has something not right. The cam will have a rougher idle, and you will hear the overlap at that time,.....but it wouldn't cause the car to backfire "until it's warm".

    A backfire is caused by one of two things:

    1.You have a vacuum leak, or 2. you (more than likely) have something wrong w/ timing. That can be either "cam" timing, or "ignition" timing. Who put the cam in? How did you/they install the timing chain?,...The distributor, Adjust the valves? Before you arbitrarily just start changing things (like your timing) let us know about the other things so somebody can give you proper advice.

    I've had mechanical roller cams in street driven cars that didn't backfire when winging the throttle even after 1 minute, and the lift and duration of one of those cams would make a B303 look like a stocker.
    #3
  4. 1200gt

    1200gt Member

    Joined:
    Nov 30, 1999
    Messages:
    305
    Likes Received:
    21
    Trophy Points:
    19
    I was considering running this cam too as I like the way they sound. I'm not so interested in dino points, just a street driven ride that I would enjoy a little lope in the bay.

    I'd like to hear how you work out this issue, even if you made a boo-boo on the install. :doh: It will help out the next newbe...
    #4
  5. mikestang63

    mikestang63 Mustang Master

    Joined:
    Aug 28, 2012
    Messages:
    3,803
    Showcase:
    20
    Albums:
    1
    Likes Received:
    1,051
    Trophy Points:
    144
    Dwayne, please don't run an alphabet cam. They are 25 year old technology. If you want a good off the shelf cam, call up comp cams or run an Anderson cam. Personally I recommend spending an extra 100 bucks and call Ed at FTI and let him grind you a cam.
    #5
  6. Strype

    Strype Cuthbert catcher Founding Member

    Joined:
    May 11, 1999
    Messages:
    2,714
    Likes Received:
    371
    Trophy Points:
    104
    Location:
    Huntsvegas, AL
    The self test said cyl 2 is out of whack so I'll chase that down first. Put it in dot to dot. We've already been 180 out but I'll check again. Hci job gt40x heads
    #6
  7. v8only

    v8only Active Member

    Joined:
    Jul 4, 2003
    Messages:
    2,370
    Likes Received:
    12
    Trophy Points:
    49
    nothing at all wrong with an alphabet cam..yea theyre old..but if we were looking for every last ounce of hp we wouldnt be bothering with gt40 heads...at the price of the anderson cam...ill just wait till i get real heads not gt40y heads...

    my b303 has a wicked little lope...but no backfiring..what is your idle speed set at? if its too low the entire car will shake...set your idle speed to 900-950, thats what it likes..i have my timing set at 18 initial 18 total but in a carbd application and it screams


    View: https://www.youtube.com/watch?v=AVCc1FWBJos&feature=youtube_gdata_player


    Sent from my SPH-L710 using Tapatalk 2
    #7

Share This Page