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Thread: Poor Performance When Hot

  1. #71
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    If you have an MSD box, then you have no need for the module in the RTR distributor. Just wire it so that the magnetic trigger wire pair goes directly to the box. Observe polarity - one way gives you rock sold timing - reversing polarity gives you a slight retard at a fairly low rpm (but it's well above idle).

  2. #72
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    Quote Originally Posted by Rick_L View Post
    If you have an MSD box, then you have no need for the module in the RTR distributor. Just wire it so that the magnetic trigger wire pair goes directly to the box. Observe polarity - one way gives you rock sold timing - reversing polarity gives you a slight retard at a fairly low rpm (but it's well above idle).
    The R2R has the electronics buried down below, covered by what looks like an almost regular distributor. At the moment I don't recall if the trigger wires are accessible unless it all comes apart. I know about the polarity thing. I had changed the pickup in the old distributor, it's just a Ford part. MSD said the wires are a guess, 50/50 chance on getting them right. I started it up and it was backfiring and acting all crazy, swapped the wires and it ran good enough to set the timing. Back when I bought the ford pickup for it, msd would tell you what part to buy anywhere but now they are selling them again.
    Tony

    1955 Bel Air Sport Coupe

  3. #73
    Registered Member chasracer's Avatar
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    Quote Originally Posted by 55 Tony View Post
    Also, I had swapped gears from the R2R to the old one. If I get a new one, is a melonized gear compatible with a roller cam? Or bronze, or composite.
    Yes for a street vehicle that is the one to use. Make sure it has the correct inside diameter for your distributor shaft.
    The problem is not the problem.
    The problem is your attitude about the problem.
    Savvy?” ~~ Captain Jack Sparrow ~~

  4. #74
    Registered Member chasracer's Avatar
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    Quote Originally Posted by 55 Tony View Post
    The R2R has the electronics buried down below, covered by what looks like an almost regular distributor. At the moment I don't recall if the trigger wires are accessible unless it all comes apart. I know about the polarity thing. I had changed the pickup in the old distributor, it's just a Ford part. MSD said the wires are a guess, 50/50 chance on getting them right. I started it up and it was backfiring and acting all crazy, swapped the wires and it ran good enough to set the timing. Back when I bought the ford pickup for it, msd would tell you what part to buy anywhere but now they are selling them again.
    You're right about the polarity. A lot of the differences you see in timing are also related to the type of MSD box it is. A 6AL normally just retards about 4* if wired in reverse, but I have also seen MSD 7AL-3 units not only retard a few degrees but also refuse to retard the timing no matter what timing chips were installed in it.
    The problem is not the problem.
    The problem is your attitude about the problem.
    Savvy?” ~~ Captain Jack Sparrow ~~

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