What did you do today?

[plastikosmd]

Made up some linkages and hit up the scrapyard for some parts to make a runner.

Got it spinning, a lot of afterfire and some backfire. Found the exhaust valves stuck open (common in this motor)


So now it seems the timing is 180 off or maybe 360 as the intake sounds like the exhaust. Switching the plug wires gets the puff out the exhaust. More to do

[plastikosmd]

Ok running like a top, I have to time it, cut shaft for pto and add a generator circuit


Video of it Running:

https://youtu.be/O_aFDIgM5pI

[3 Phase Lightbulb]

Ok running like a top, I have to time it, cut shaft for pto and add a generator circuit


Video of it Running:
https://youtu.be/O_aFDIgM5pI

Nice job getting her running! I assume you're running it without an exhaust? Looks like exhaust manifold into a SCH40 pipe for the test run? It must have been loud as hell

[Dave C]

I hope that crack in the fins does not extend into the exhaust port.

Made up some linkages and hit up the scrapyard for some parts to make a runner.

Got it spinning, a lot of afterfire and some backfire. Found the exhaust valves stuck open (common in this motor)


So now it seems the timing is 180 off or maybe 360 as the intake sounds like the exhaust. Switching the plug wires gets the puff out the exhaust. More to do

[3 Phase Lightbulb]

I hope that crack in the fins does not extend into the exhaust port.

It doesn't look like a crack to me, it looks like cosmetic casting ridges from the mold to me.

[Dave C]

Could be, and I thought so at first; but it looks like a section of some fins further back is missing. Maybe the block took a hit at some point breaking that section off, and possibly causing the crack. I hope you are right. My eyes are not what they used to be.

It doesn't look like a crack to me, it looks like cosmetic casting ridges from the mold to me.

[Willy]

It doesn't look like a crack to me, it looks like cosmetic casting ridges from the mold to me.

This would be my guess as well. If you look closely you can actually see the casting line extending down underneath the ridge into the remaining fins.

[Dave C]

Well, my mistake. If it's running like a top, it must be casting flash and not a crack. Just call me Debbie Downer.

[3 Phase Lightbulb]

Well, my mistake. If it's running like a top, it must be casting flash and not a crack. Just call me Debbie Downer.

[plastikosmd]

Will look, didn’t note a crack and runs well
Will follow up

[Mark Rand]

It's just a mould flash/misalignment from the mould segments that allowed the inlet and exhaust passage cores to be placed. Much the same as the one where the moulds were split to allow the cylinder cores to be placed.

[danlb]

Flashback 3 weeks: In order to answer a question about my "set true" stye chuck I took it off the lathe and promptly dropped it on the concrete. Nothing appeared broken so I put it on the shelf. For that last three weeks it haunted me that I might have bent something internally.

Today I mounted it again and ran it through it's paces. I turned a 4 inches of a 6 inch long bar down to .75 diameter to use as a test bar. After aligning the chuck with the bar I had about .0003 TIR. I remounted the bar 5 times and it was never worse than that. Just for grins I chucked up a 1 inch and a 1/2 inch ground bar. Both were within .001TIR without adjustment.


It looks like I lucked out and there were was no damage. I'd post pictures, they are pretty boring when you can't see the needle move. )

[Dave C]

Good one

[jdedmon91]

What did you do today?

Out hanging out in my shop this morning.

Finished up my clone tripod mount for my camera photo below
Also knocked out a tool tray for the mill. Since the mill and the lathe are so close it probably be used for both.
Also made a bushing to use a small insert boring bar on my Shars boring head. I didn’t take a picture of that.

Just hanging out

Sent from my iPhone using Tapatalk

[3 Phase Lightbulb]

Busted into a box of Lays Ketchup chips that arrived today. Cost well over $1 per bag, but so worth it