Steve just curious why you picked the vc223 for duraspark use.

Thanks,Kenny

Kenny  Onalaska, Texas

Thanks Steve, I put the 925 advance springs in and left it as it was. Got her running ok and set it up with 7.5* at idle no vac, this gave me 40* mech advance, hooking up the vac put it at around 50* It took her for a spin and all was well, so uped it to 10* I think that gave me somewhere around 45* mech advance and with vac say 55* Now this seems alot but it runs well and doesn't ping at all...

The Petronix was a lot more acurate under the timing light, hence its very smooth, can't say there has been revelation since fitting it but it's probably decieving as it is so much smoother..



"Came too close to dying to stop living now!"

No worries, Mate....Don't give up the ship!....This is how the "old school" Autolite dizzy gets its advance stops changed.......braze or silver solder in the ends of the slots to shorten the travel....

Then opened to a predetermined length with a 1/4" diameter rat tail file......

If you want a different number of degrees of travel - send me a PM - and I'll figure it out on the CAD drawing i have in my computers.

(The one in the photo has had its cam cut off to fit a Duraspark reluctor)

 
 Steve Metzger       Tucson, Arizona

Today I have finally opened up the dissy to do the mods.. Looks like I am outta luck here too! There is no adjustment for changing the timing internally, no slots marked 13 or whatever.. nothing, just has two slots the same. . Guess I will fit the 925D springs and see how it goes with the Pertonix kit fitted. I take it that those slots should top out at 36* ??  God knows what the vacuum advance is gonna do......



"Came too close to dying to stop living now!"

hi there

gawsh  i feel silly  it was 3/32" not 3/16"  as i said previously

i don't think Crane do these anymore i can't find them on their website.

(note to self   engage whats left of brain first)

stuey

I think the "STANDARD" brand of vacuum pots use a 3/32" hex which is a bit  smaller than 2.5 mm  - in case maybe you just haven't tried a small enough instrument. This picture isn't the one I want but its better than none.....its a Motorcraft type distributor, which I hope you've got.

You remove the vacuum pot attachment to the swiveling point plate (small "C" clip) and two screws and it comes off easy enough. The point plate only has a pair of screws that mount it down into the dizzy body - off over the point cam, and you end up with a view much like this one. The upper rotor shaft is retained by a clip hidden down in the bore under the point where the rotor fits. Cleaned up - you'll see a pair of "whisker" sized legs coming up the bore - they spread to release the clip on the shaft. When the clip is gone - and the two flyweight springs are removed - the upper rotor shaft will come up out of the dizzy. This would only be necessary if you want to change the advance "curve".

 
 Steve Metzger       Tucson, Arizona

I had no idea crane did them ? ...

Shakey it is a late model recoed dissy thats why I thought I would come standard with adjustable vac advance, and I have springs on the way to do the curve.

Now I am going to have to work out how to disassemble soon.. Tips guys?



"Came too close to dying to stop living now!"

Talkwrench   good morning

i've a Crane version and it uses a 3/16" allen key

stuey

I thought that throttle responce controlled the amount of vaccum at the dist. weather it,s taken from the intake or carb. if you are looking for better response get a dist from a 57 ford and get it set up on a dist machine to get the advance curve set for your application then you have the best of both worlds just my thought shakey Pete

This photo shows the "STANDARD' part I came up with for my Duraspark II conversion dizzy - but you would want a different part number I'm sure for the points style of pivot plate. Somehow I keep thinking the one you want is the STANDARD VC-221 - but don't take that as accurate without checking it out.

How late did they use points on the "down under" Ford big sixes and v8's? The vacuum pot is virtually unchanged in mounting and function over a huge span of years here. You might take the dizzy to a parts house and have a look at what they've got right there in Perth. Your outfits don't run backwards do they?  

Choice of the "live" and "ported" vacuum turns out to be a sort of religous experience. I think it just turns out to be which method results in the best tuning for the individual (man or motor). I like the "live" because the engine idles cooler and (my opinion here) starts quicker with lower initial advance. Gives a nice idle vacuum reading too.

 

Searched around a bit and it looks like the STANDARD VC-198 is the point distributor version. Its for a '69  302 I believe.

 
 Steve Metzger       Tucson, Arizona