Another one bites the dust

[Flyinhillbilly]

Me and my brother actually discussed patching the hole with flex seal and screen wire just to see what would happen. I have another piston. Rings and a rod and it would be back in business. I also have an extra block that I may transfer what's left of this one into. I'm not sure what I'm going to do just yet, but I feel a fit of hackery coming on since I have enough spare parts to throw something together for the heck of it. That welch clone should be here this week, so I'll have to see what I've got going on there too, so far it looks promising.

 

[chancer]

Now that it's been out in the rain, you can just forget about repairing it.

"It'll be fine"

 

[Whitetrashrocker]

Yeah, that rain will ruin everything.

 

[Flyinhillbilly]

Now that it's been out in the rain, you can just forget about repairing it.

This has my vote for funniest post of 2016.

 

[Hellion]

Me and my brother actually discussed patching the hole with flex seal and screen wire just to see what would happen. I have another piston. Rings and a rod and it would be back in business. I also have an extra block that I may transfer what's left of this one into. I'm not sure what I'm going to do just yet, but I feel a fit of hackery coming on since I have enough spare parts to throw something together for the heck of it. That welch clone should be here this week, so I'll have to see what I've got going on there too, so far it looks promising.

That's all fine and dandy and a hoot, but can we safely say it is your mission in life to destroy as many small engines as possible... and have fun doing it?

The financial side of all this just has me saying yikes, mang.

 

[chancer]

This has my vote for funniest post of 2016.

We should have that!

 

[Flyinhillbilly]

It's not that I'm actively trying to break them, I'm working on figuring out how to make them run. Sometimes they blow up.

yeah, the financial side of it blows, but I figure you have to pay for your education.

 

[KartFab]

It's not that I'm actively trying to break them, I'm working on figuring out how to make them run. Sometimes they blow up.

yeah, the financial side of it blows, but I figure you have to pay for your education.

Must be attending the school of hard knocks

 

[Flyinhillbilly]

The only school I've ever learned anything worth knowing from.

 

[chancer]

It's not that I'm actively trying to break them, I'm working on figuring out how to make them run On Strange fuels, at ridiculously high RPMs, to produce Maximum HP for a long Duration.. Sometimes they blow up.

There fixed that for you.

 

[Flyinhillbilly]

So I've been looking at the parts and thinking about what happened. I can see in the rod cap where the aluminum is smeared into the relief where the cap bolts to the rod going in the direction that it would if the rod were binding, and the cap broke at the oil hole.
What I think happened is this:
High RPM caused the rod to swell from the heat created. I think this because the middle of the rod is worn differently than the outsides, which would stand to reason that the middle of the rod would hold more heat not having oil directly splashed on it. Once the rod got hot enough to "grip" the crank, the heat very rapidly increased causing the rod to swell further, smearing the bearing surface and bluing the crank before it finally just broke at the weak point which happened to be the oil hole.

Just my uneducated hillbilly figuring, I figure I'll use spare parts to build an identical one except with more rod/ crank clearance and wind the snot out of it and see what happens.

 

[Whitetrashrocker]

Why don't you design an oil pump and then we can all wind the snot out of our engines...
Splash just doesn't quite make it

 

[Flyinhillbilly]

I think the arc rod is the closest thing to an oil pump as we'll see in these little engines. It's certainly good enough.

 

[chancer]

Aside form being Billet and all,
The ARC rods oil Flicker design. With bearing oiler hole. Is a HUGE improvement over the Stock Rod.
For its purpose it is a beautifully designed well thought out part.

 

[Whitetrashrocker]

Guess I'll have to see an ARC rod for myself then.

 

[Hellion]

Didn't Lee Majors document his ARC rod fairly well in his Briggs overhaul thread?

It is quite an attractive piece, that rod.

 

[chancer]

Yes that is the place! Thanks.

 

[Flyinhillbilly]

New (to me) motor came in today. Blueprinted clone with a raceseng S1 flywheel.

 

[Flyinhillbilly]

Zero deck

 

[Flyinhillbilly]

The cam says this. I haven't bothered with looking it up because I'm sure it's AKRA legal meaning "stock"


The plan is to put the ported 14cc head from the one that just blew up on it alcohol carb and all, set the timing for methanol and run it.