Ted Eaton has data that shows that the widening of the plug gaps didn't help his dyno engines - probably just as good a result from using the standard gap set-up. That being the case - why stress the parts with a forced higher voltage?

 
 Steve Metzger       Tucson, Arizona

Thanks guys for all your suggestions.  I think I will go with the higher output ignition coil with this dual point distributor and might even try opening up the spark plug gap to forty to forty five thousandths.  I know, I could go with electronic ignition but I just like to tinker with the old stuff.

buddy

The dwell of the single set of points should be 26°-28°, the same as the single point distributor. When the second set is in play, dwell should extend out to about 34°-35° if I remember correctly. The additional set of points increases the coil charge time between plug firing by the proportion of 35/27 or roughly 30%. This change in duty cycle will make the coil run a bit hotter than the single point set-up.

 
 Steve Metzger       Tucson, Arizona

I read somewhere that a Hi-Po 289 duel point breaker plate will work in a Yblock dist. This could be the reason for the C0 part #. I can never find one so I cant confirm it. I found an aftermarket duel point breaker plate on Epay for 57 dist. Works fine. The guy must have had a few of them because he raised the price after I bought one. It was a Dyna-Flyte model 378-D.

Dan      Kingman Az.      86409

I'm not trying to make a hotrod but I would like to get the maximum performance out of what I have, so I wonder if a hotter or higher out put ignition coil and increasing the spark plug gap just a little would be advisable with the dual point distributor? 

buddy

Ford did make a dual point distributor for Y blocks, but it was for the '57 supercharged engines.  But it would not have a '60 part number.  The rotovance distributor was made by Holley, could have been available at Ford parts counter.  I bought mine in about '60 from Honest Charley's Speed Shop, I don't remember if it had casting marks.

John - "The Hoosier Hurricane"

We used to just put a thin piece of cardboard between one set of points and measure dwell on other.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

I thought I read somewhere that Ford made an over the counter distributor with centrifical advance available in 1956, (?) which I think was called a "Rotovance" distributor. Or is my memory failing me again?...

Paul

If I remember correctly the point gap is suppose to be .015 with dwell of 26 to 28 degrees.  Is there a way you can check individual dwell of each set of points and what would total dwell be for the dual point? 

buddy

Buddy, its never been hard to add 2nd point set, it has been done here for years and i have several dists with it done.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia