Can't get my engine to quit "pinging".

[boilermaster]

csgt428.
black = 9 degrees = 18 crankshaft= .373'' od.
you need slightly less
fbo ignition ebay sells slightly larger bushings (less crankshaft degrees)
they sell a 7, = 14 degrees crankshaft and a 10 kit
FBO ignition 1 541 942 5980
ps black, commonly sold in msd kit would allow you to get to 14degrees initial and 32 total.
Boilermaster

 

[Stanglover]

I've been following this along, but now I'm totally lost.
This post seems to be jumping from one car/engine to another.

For my money, I'd pull out that Mallory and ditch the thing. Buy a DuraSpark distributor from Performance Distributors (I think that's the name) that they can set up for your motor specs. (or do it yourself)
Failing that, find the best Motorcraft/Autolite 351C distributor from your 'stock' and rebuild it. On my 71 4V 351C with cc heads, I built mine with a 10L limit slot (had to weld a 15L and recut it, = 20 degs. crank) with one Ford heavy spring set slightly loose and one lighter Mr.Gasket 925D. The initial is set at 14 degs. This dist. has an adjustable vac can, which is about 4 degrees on top. This equals 34 mechanical to 38 (ish) all in at 3K rpm. This is powered by a Pertronix Ignitor II with matching coil, 8mm spiral wound copper wires.
Also, I would question that 850 carb, imo way too much carb for a 351C. I run a 670 Holley that's about perfect.

 

[csgt428]

csgt428,
sorry your math is wrong if you want 32 total and 16 initial you would want 8 distributor.
distributor degrees = X2c at the crankshaft.
I f you verify you have a replaceable type bushing, I think I can find my secret bushing paperwork
that C9ZX told me about.
Boilermaster

You must be measuring it some other way. I go off the degrees reading on damper with my light. When I set it at 8* idling it goes to 32* total on my damper when I rev it to 3k or so rpms. I have the damper marked also...so I can tell where it's at. I've just been subtracting 8* from 32* to end up saying my dizzy has 24* total mech adv in it. Isn't that the way you are supposed to do it?

 

[csgt428]

csgt428,
sorry your math is wrong if you want 32 total and 16 initial you would want 8 distributor.
distributor degrees = X2c at the crankshaft.
I f you verify you have a replaceable type bushing, I think I can find my secret bushing paperwork
that C9ZX told me about.
Boilermaster

OK. You must be measuring it some other way. I go off the degrees reading on damper with my light. When I set it at 8* idling it goes to 32* total on my damper when I rev it to 3k or so rpms. I have the damper marked also...so I can tell where it's at. I've just been subtracting 8* from 32* to end up saying my dizzy has 24* total mech adv in it. Isn't that the way you are supposed to do it?

 

[csgt428]

I've been following this along, but now I'm totally lost.
This post seems to be jumping from one car/engine to another.

For my money, I'd pull out that Mallory and ditch the thing. Buy a DuraSpark distributor from Performance Distributors (I think that's the name) that they can set up for your motor specs. (or do it yourself)
Failing that, find the best Motorcraft/Autolite 351C distributor from your 'stock' and rebuild it. On my 71 4V 351C with cc heads, I built mine with a 10L limit slot (had to weld a 15L and recut it, = 20 degs. crank) with one Ford heavy spring set slightly loose and one lighter Mr.Gasket 925D. The initial is set at 14 degs. This dist. has an adjustable vac can, which is about 4 degrees on top. This equals 34 mechanical to 38 (ish) all in at 3K rpm. This is powered by a Pertronix Ignitor II with matching coil, 8mm spiral wound copper wires.
Also, I would question that 850 carb, imo way too much carb for a 351C. I run a 670 Holley that's about perfect.

Sorry about that, I was getting confused myself by working on two cars at the same time. I will go to the Boss 302 site to talk about the other car. I've edited it and it's all about this 351/408 stroker in my 72 R code now. The big carb was suggested by the builder, or maybe it was 800cfm. It is a stroker with a roller cam. I told him I wanted it to be able to rev to at least 7500 and 8K rpm occasionally.
But looking at my cam specs, I listed them earlier, I might be running out of power by then anyway. Not sure...since my tach quit working. I'm not running headers yet either, though I have a set. I have lots of different carbs here I could try. 670 Holley, 750 Demon or 2 diff 750 Holleys one is DP street brawler, 800 DP, 850 DP on there now....

Not sure what to do about the dizzy yet. I have the 3.91 gears in it also so the 8* initial doesn't seem to bother it much...