Announcement

Collapse
No announcement yet.

Cotten, I moved shovelhead operating temp here

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • ryan
    replied
    Originally posted by Peter Cooke View Post
    Isn't that why cars have the 'accessories' position on the ignition switch? So you can use the battery without charging the coil and risk burning it out.
    I was always taught to not leave the ignition switch in the 'on' position, without the motor running, for that reason.
    I was always taught that as well, but just happened to forget the switch was on. You did give me a thought though, I am not sure if starter can be used in accessories position on my bike or not, but I am going to check.

    Leave a comment:


  • Peter Cooke
    replied
    Isn't that why cars have the 'accessories' position on the ignition switch? So you can use the battery without charging the coil and risk burning it out.
    I was always taught to not leave the ignition switch in the 'on' position, without the motor running, for that reason.

    Leave a comment:


  • ryan
    replied
    Originally posted by pan620 View Post
    I have seen 3 or 4 coils do what happened to yours, can not explain why but it does happen.
    I think it is because the coil was charging, while the ignition was on, and could not release it's energy, so the energy built up and melted in down.
    It kind of sucks to, because a big bike show is going on today, a huge 30 mile Trump parade and it's my birthday. Could have been worse, it can always get worse.

    Leave a comment:


  • pan620
    replied
    I have seen 3 or 4 coils do what happened to yours, can not explain why but it does happen.

    Leave a comment:


  • ryan
    replied
    Originally posted by T. Cotten View Post
    Well then we gotta blame the coil, huh.

    ....Cotten
    So does that mean that the coil was going out anyway? It was an Andrew's coil from the early nineties. Lol

    Leave a comment:


  • T. Cotten
    replied
    Originally posted by ryan View Post
    It sure did drain the battery Cotten. The battery is not even a month old.
    Well then we gotta blame the coil, huh.

    ....Cotten

    Leave a comment:


  • ryan
    replied
    Originally posted by T. Cotten View Post
    I knew that if the points were closed, Ryan,...

    That it would drain the battery; If it cooked the coil, I'd guess that was one helluva battery.

    ...Cotten
    It sure did drain the battery Cotten. The battery is not even a month old.

    Leave a comment:


  • T. Cotten
    replied
    I knew that if the points were closed, Ryan,...

    That it would drain the battery; If it cooked the coil, I'd guess that was one helluva battery.

    ...Cotten

    Leave a comment:


  • ryan
    replied
    Originally posted by T. Cotten View Post
    Leaving the switch on cracks coils, Ryan!?!

    This is new to me, as is everything electrical.

    .... Cotten
    This was new to me as well Cotten, I was putting things back together after timing, compression testing and adjusting the front brake all while the switch was on. I was picking up tools and smelled something hot and then I started hearing something crackle, my eyes went straight to the coil and then it started cracking and splitting apart before my eyes, I looked at my switch and instantly turned it off, my coil was very hot and my ignition switch was pretty warm as well.
    Why did this happen, why did it take so long to happen and why didn't the breakers protect it? Oh, the points were closed.

    Leave a comment:


  • T. Cotten
    replied
    Leaving the switch on cracks coils, Ryan!?!

    This is new to me, as is everything electrical.

    .... Cotten

    Leave a comment:


  • ryan
    replied
    Oh my gosh, I make a stupid, stupid mistake. I left the ignition switch on, by mistake, for about 45 minutes after doing the compression test and cracked my coil in a few places. The circuit was protected by a 30 amp breaker and then went through a 15 amp breaker. I am so lucky I was beside my bike when this took place.

    As far as the timing went as far as comparing strobe light timing to static timing: Static timing was advanced so much that the line was just outside the window. I retarded the timing so the line was in the center of the window at or just over 2k rpm.

    Leave a comment:


  • T. Cotten
    replied
    That explains a lot, Ryan!

    So much for 'octane boosters', huh.

    ....Cotten
    PS: Somewhere I have a pair of 1/16" cylinder base shims I ran in the late '70s-early '80s.
    Suddenly they are worth something to somebody.
    Last edited by T. Cotten; 09-12-2020, 05:22 PM.

    Leave a comment:


  • ryan
    replied
    Originally posted by T. Cotten View Post
    The first thing I would do, Ryan,..

    Is to strobe it to where the line is in the front of the hole, and see if anything improves.

    If its clacking away from stop signs before the tank is hot, no cooler is going to help.

    Do you know what pistons are in it? Can you give us a compression reading?

    ....Cotten
    Ok, Compression testing: cyl one is 65 initial push and 143 psi Cylinder two initial push is 65 and 145 psi. This was tested on a warmed up engine.

    So my compression ratio is almost 10:1 (145/14.7=9.8)

    I just strobe timed is and going on a test ride.

    Leave a comment:


  • ryan
    replied
    Hopefully I can get it with the strobe light, if not the servicar weights and springs.
    How would I use a manual timer without the mounting at the block for the timer cable? Is there an adapter plate or would I have to fashion one? Boy !this is turning into some work.
    I do not have this much trouble with my hopped up 289 hipo with the same total timing of 35° and 2.5 points up higher on compression.

    Leave a comment:


  • Rubone
    replied
    Thinking out loud here, perhaps the Servi-Car weights and springs are set up for a slower advance due to the needs of the bike, and those needs somewhat mimic a sidecar tug...
    And simple compression plates under the cylinders could help with the ping.

    On a manual advance timer the rider can control the advance curve which I find quite handy in traffic or steep grades on my sidecar rig.

    Leave a comment:

Working...
X