Holley 650 rebuild kit

Discussion in 'Technical' started by dspr, Jul 5, 2011.

  1. baddad457

    baddad457 Member

    Joined:
    Feb 24, 2007
    Messages:
    5,861
    Likes Received:
    141
    Trophy Points:
    171
    Location:
    Opelousas La.
    Stopping suddenly? That's an ignition problem. If it were a carb problem, it wouldn't just "stop" all the sudden. The rubber tip ? That's more'n likely up inside the idle circuit now and if you'r fuel has alcohol mixed into it, that's likely why the rubber tip is missing now. You didn't answer my question, are you still running points ?
     
  2. dspr

    dspr Member

    Joined:
    Jul 6, 2007
    Messages:
    248
    Likes Received:
    16
    Trophy Points:
    62
    Location:
    Trondheim, Norway
    Vehicle:
    1971 Comet GT
    Yes, I am running points :)
     
  3. baddad457

    baddad457 Member

    Joined:
    Feb 24, 2007
    Messages:
    5,861
    Likes Received:
    141
    Trophy Points:
    171
    Location:
    Opelousas La.
    There's most of your problem. Replace them with an electronic module (Pertronix, etc)
     
  4. dspr

    dspr Member

    Joined:
    Jul 6, 2007
    Messages:
    248
    Likes Received:
    16
    Trophy Points:
    62
    Location:
    Trondheim, Norway
    Vehicle:
    1971 Comet GT
    Noted :) I'll probably do a few modifications when I put the car away for the winter :)
     
  5. baddad457

    baddad457 Member

    Joined:
    Feb 24, 2007
    Messages:
    5,861
    Likes Received:
    141
    Trophy Points:
    171
    Location:
    Opelousas La.
    Points are fine once they're set PROPERLY but they do not stay that way for long with the wearing of the point block againnst the distributor cam, add in the wearing of the point contacts to that mix too. As all this wear occurs, the dwell angle continually changes throwing the adjustment off. This affects the overall tune of the engine and is often mistaken for the carb tune changing. This is where multiple carb setups got their bad reputation. Once a Holley is set, it will stay that way for years. The only two things that'll cause it to change is bad and/or inferior fuel, and the slight wearing of the throttle shaft in the carb base. And that will take a long time as long as you don't use a return spring that's too heavy. Changes in the atmosphere will also affect the tune of a points ignition, another area that was incorrectly attributed to carbs.
     
  6. PaulS

    PaulS Member extrordiare

    Joined:
    May 3, 2004
    Messages:
    4,858
    Likes Received:
    11
    Trophy Points:
    0
    Location:
    Seattle area
    Vehicle:
    1966 Mustang, 1972, 73, 73 and 73 Mavericks
    Well, good parts properly installed in a points type distributor will run well for two years as long as the dirtributor breaker plate is not worn and the cam is lubed. I have two cars that currently run points without problems. I set them when I install them and don't touch them until I replace everything in the next tune up. My plugs last that long too - standard Autolite plugs gapped at minimum spark gap for smooth idle (.028 - .030").
     
  7. baddad457

    baddad457 Member

    Joined:
    Feb 24, 2007
    Messages:
    5,861
    Likes Received:
    141
    Trophy Points:
    171
    Location:
    Opelousas La.
    This depends on the quality of the points set used. Most are crap and seldom run six months in a daily driven car, before needing adjustment or changing. Pertronix ? Never needs adjustments. Nor does a Duraspark. Set it and forget it. Plugs last 4-5 years.
     
  8. PaulS

    PaulS Member extrordiare

    Joined:
    May 3, 2004
    Messages:
    4,858
    Likes Received:
    11
    Trophy Points:
    0
    Location:
    Seattle area
    Vehicle:
    1966 Mustang, 1972, 73, 73 and 73 Mavericks
    I did mention good parts - standard Blue streak works well for me.
    My cars are daily drivers.

    Leave the ignition on without starting the car and the DSII burns out - but a new one. Pertronix has its own problems - as some here have experienced.

    No system is perfect but the one in your car at the time. :)
     
  9. dspr

    dspr Member

    Joined:
    Jul 6, 2007
    Messages:
    248
    Likes Received:
    16
    Trophy Points:
    62
    Location:
    Trondheim, Norway
    Vehicle:
    1971 Comet GT
    I bought a pertronix set, so I'll try that out as well :)
     
  10. baddad457

    baddad457 Member

    Joined:
    Feb 24, 2007
    Messages:
    5,861
    Likes Received:
    141
    Trophy Points:
    171
    Location:
    Opelousas La.
    Never had a problem with a Pertronix I or II, nor with the Crane XR-1. Left the ignition on many times too. Duraspark ? Can't beat it either.
     
  11. dspr

    dspr Member

    Joined:
    Jul 6, 2007
    Messages:
    248
    Likes Received:
    16
    Trophy Points:
    62
    Location:
    Trondheim, Norway
    Vehicle:
    1971 Comet GT
    Mounted the pertronix today, but the car wouldn't fire with it.. Did some measuring and found that I only had about 6 volts at the + on my coil.. Do I have to mount the + for the pertronix somewhere else, where I'm able get 12 volts or is it just something that I've overlooked?
     
  12. baddad457

    baddad457 Member

    Joined:
    Feb 24, 2007
    Messages:
    5,861
    Likes Received:
    141
    Trophy Points:
    171
    Location:
    Opelousas La.
    You need to remove the voltage resistor segment in the ignition wire. This is supposedly somewhere between the firewall and the coil.
     
  13. dspr

    dspr Member

    Joined:
    Jul 6, 2007
    Messages:
    248
    Likes Received:
    16
    Trophy Points:
    62
    Location:
    Trondheim, Norway
    Vehicle:
    1971 Comet GT
    So I can just replace the entire wire with a new one? The original one wasn't looking too good..
     
  14. baddad457

    baddad457 Member

    Joined:
    Feb 24, 2007
    Messages:
    5,861
    Likes Received:
    141
    Trophy Points:
    171
    Location:
    Opelousas La.
    Yes. :thumbs2:
     
  15. dspr

    dspr Member

    Joined:
    Jul 6, 2007
    Messages:
    248
    Likes Received:
    16
    Trophy Points:
    62
    Location:
    Trondheim, Norway
    Vehicle:
    1971 Comet GT
    Awesome, cause it was broken and spliced 3 places just in the engine bay.. All the wiring in the engine bay actually looks like that :oops: I'll have to change most of the wiring this winter :p
    I actually think I found out why the car would just randomly stop when the carb was tuned perfectly: The wire going from the points in the distributor to the coil was just twirled together with tape on the outside, and they were just hanging on with like 3 or 4 (!) copper threads :p
     

Share This Page