Balancing - 3 Things You Should *Never* Do (Expo 2024 - Episode 16) 

Enlightening to the voodoo of engine balancing and the importance of finding someone competent to accomplish it.

Apparently... Randy is the man. I don't think I heard anyone mention drilling limitations in such detail before.

The "frequency" he mentioned is why most American inline 6s start shedding flywheels and balancers, over 7000rpm, go to fully counterweighted cranks with Titanium rods and light pistons and you can buzz the inline 6s to "10,000" rpm, but the counterweights must reflect the lighter parts.

Great video. As a long time engine builder, tech, racer, and shop owner. Subscribing to the lighten the reciprocating not rotating has been my argument for decades. However, this is new ideas and they are subject to a couple questions. Like 1st, when measuring for the weights and saying we split the rod into its two weights. The rod journal, throws, counters, and big end of the rod could be considered as reciprocating mass as it is subject to angular velocity as a whole. I agree with keeping the integrity of crank in status but some of the cranks we used in the days of old were not gun drilled as most are today. So we did a lot of that or replaced them if you had the doe in the budget to buy the upgrade. Racing in claimer class stuff usually doesn't allow. We used to lighten rods when aluminum wasn't allowed. Even get wrist pin and piston funny with JE or Wisco custom pistons making the reciprocating light. We even built measurable cylinders for the tech inspect that the math said was under CI limit but the other 7 were significantly larger. Ain't no replacement for. How does he feel about the rod getting lighter and how when aluminum or stock rods are required. Like "clears throat" grinding all the weights n stress off of stock rod like Vizard did to that grenade they built. Seems like this guy really has a handle on extended knowledge of the lower end. Love the technical term., " pissed off"

Smart... CWT machines are super cool.

Great info and content thanks for sharing

02:00 ....If that handy weight Spacer doesn't exactly Center the counterweight (Like Your rods Will), seems the Computed balance data & resulting Dynamic running engine balance will be Consistently wrong also (If 0.10" horizontal placement inconsistency has "Scary" effects)...I would use a custom Width spacer unique for Specific crank journal Centerline.....

Rpm is the reason for overbalance its changes the center of mass, when an Aluminum Rod stretches .050 changes the center of mass, or steel stretches .035, move the piston, pin, locks and small end that much and your bobweight is no longer accurate....example one rod is going up when the rod on the same journal is headed down on a V8 whether 90° or 180° configuration.

Good video on balancing I used to love to do the balancing on the engines Mercedes was probably the only engine that we would bounce it didn't even need any holes drilled. I was going to say don't drill The bouncing holes in the main journals or rod journals haha just a joke.

Heavy metal added to crank to balance assy. should be drill horizontal thru the counter weights...

The design of OEM crankshafts has overlap of the cross-section of the main journals and the rod journals. That’s why main journals get bigger as stroke gets bigger. This makes the crank stiff. Stroker cranks generally have less of this overlap and are less stiff.

MISSION IMPOSSIBLE's crankshaft is polished by yours truly😎

What about concentric bobweights and your ones, adding them up as vectors?

He’s not kidding, he talked me through the whole process a few years back when I called.

On race engines I have them balanced at 53%.

Lake should consider switching to decaf.

What percent are you balancing the crank?

Are the loads (misbalance) exponential to RPM?

We need a vid on 2nd order balance

How about a Vid. on ''Knife Edging'' Cranks? Good or Bad?

Bob weight location is critical but he doesn't tell us where it should be.

Thank you for your knowledge and videos USA 🇺🇸 TRUMP 2024 2024

lake speed ruins another good video

LOL.... you guys should sell stay sharp knives. WAY TOO yank for the rest of the world. I made it to 2 mins and the voices were just too annoying to listen to!