[Fot] Ignition coil for 6 cylinder with points (racing)

[fubog1]

 I agree, a lot of electrons going through there, and the red plastic rubbing block on the modern points has its limit.Points are fine on a 4-cylinder engine, if all is kept in order, but a 6-cylinder at those revs is pretty much at the limit; it has to do with coil saturation time, the amount of time that the points are closed.There's a limit to how fast the points can be made to open and close, just like a cam/valve action, and the modern optical & magnetic units are instantaneous and allow max saturation time for a good spark.A 6-cylinder @ those revs would likely benefit from a modern unit.Glen
 
 
-----Original Message-----
From: Bill Tobin via Fot <fot at autox.team.net>
To: fot <fot at autox.team.net>
Sent: Mon, Sep 9, 2019 1:18 pm
Subject: Re: [Fot] Ignition coil for 6 cylinder with points (racing)

 Jason, sounds like you have too much current going through the points. Maybe try an external ballast resistor. (Ask me how I learned this!). Why not go Pertronix or other pointless distributors? KISS. But always carry a spare!
  Cheers, Bill
  On 9/9/2019 11:07 AM, Jason Sukey via Fot wrote:
  
 
Had a wonderful time at the Glen, still chasing some gremlins, but getting closer! 
  I've been struggling with points on my GT6, before I throw them away and buy a 123tune dizzy, I'd like to survey the other 6 cylinder guys to see if anyone has found a good setup that works with points. 
  My engine is about 12.5:1 compression, typically shifting just under 7000 rpm, but will rev to 7300 rpm depending on the situation.?? Lucas 25D6 dizzy built by Advanced Distributors. NGK BP8ES plugs, .028" gap. Points are the ones with the red plastic that come in the green "lucas" box, gapped to .015" 
  The problem:?? I keep melting the plastic block on the points causing the point gap to close up to zero.?? At the suggestion of Jeff at Advanced Distributors, I replaced the 1.5 ohm coil with a 3.0 ohm coil (no ballast resistor).?? With the 3.0 ohm coil, the points??seem to last, but the car won't rev past 5000 rpm. 
  With the hotter 1.5 ohm coil, the car runs really strong, and as long as I don't let the engine idle for very long, the points will last a couple sessions.?? I've been thru three sets of points, tried two different condensers all with similar results. 
  The tow crew at Watkins Glen is very efficient, I pulled off behind the armco on the pace lap and was still able to watch all but the first two laps of the all Triumph feature from the stands! 
  Jason Sukey 
   
  
_______________________________________________fot at autox.team.nethttp://www.fot-racing.comDonate: http://www.team.net/donate.htmlArchive: http://autox.team.net/archive http://www.team.net/pipermail/fotUnsubscribe/Manage: http://autox.team.net/mailman/options/fot/william.tobin31@verizon.net _______________________________________________
fot at autox.team.net

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/fubog1@aol.com


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/fot/attachments/20190911/aca8d0c7/attachment-0001.htm>