Rollmaster Timing Set
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Rollmaster Timing Set

  1. #1
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    Default Rollmaster Timing Set

    Hello,

    I need some help with my new Rollmaster timing set. I installed the cam straight up and found that is is 3 degrees retarded from where I want to be. I could make the mods with the cam gear drilling the bolt holes a bit larger and installing an offset bushing, but with the crank gear having 9 keyways for different installations I would like to give that a try. Here is the problem. The crank gear has two marks on it. One "O" directly above the keyway I used for the straignt up install, and one "O" in the throat of the gears three teeth to the left. There are a total of 9 keyways and that is the only markings on the gear. To top it off the instructions are vague to say the least. I think I could use the second keyway to the left of the keyway marked with the "O" and it will be 4 degrees crankshaft advance or 2 degrees cam advance. I also think the dot on the cam gear should be pointing toward the throat of the gear teeth directly above the crank keyway I choose to use, but I don't know for sure. They didn't teach this chit at Purdue Engineering School Can anyone provide assistance before I have this thing on and off 15 times?

    Thanks,

    Craig

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  3. #2
    steelcomp was here
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    Craig, the dot above the key way correlates to the dot between the teeth. The key ways to the left of the dot will advance the cam timing, and the key ways to the right will retard the cam. For every groove you move the key way, you need to essentially move the dot between the teeth two teeth in the same direction. For your needs, you can either advance two, or four degrees. I'd go four to allow for a little chain stretch/play. To do this, move the crank gear to the second key way to the left of the dot (zero). Now take a sharpie and make a new dot between the fourth and fifth tooth (fourth throat) on the crank gear, to the left of the original dot (zero) This new dot you made will align with the dot on the cam gear when they are both straight up and down, respectively. This will advance the cam 4 deg.
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    Steel,

    Thank you for clarifing as that is what I thought. The directions that came with this set could not be more poorly written and after studying it for a while and looking at their website I got confused.

    Thanks,

    Craig

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  6. #4
    steelcomp was here
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    Quote Originally Posted by WETTE VETTE View Post
    Steel,

    Thank you for clarifing as that is what I thought. The directions that came with this set could not be more poorly written and after studying it for a while and looking at their website I got confused.

    Thanks,

    Craig
    No problem. Glad to help.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  7. #5
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    Craig,
    The instructions in Rollmasters catalog are a little better, if you need a copy I can fax them to you, but it seems Scott has got you lined out.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

  8. #6
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    Quote Originally Posted by WETTE VETTE View Post
    Steel,

    Thank you for clarifing as that is what I thought. The directions that came with this set could not be more poorly written and after studying it for a while and looking at their website I got confused.

    Thanks,

    Craig
    You ain't kidding! I spent a whole day tryin to figure it out. That was my first time doing it with the crank gear. Never had problems degreeing in with bushings.
    Quote Originally Posted by One More Year View Post
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