Why Balance A Stock 396 Big Block Chevy?
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- čas přidán 23. 01. 2023
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We're getting closer to wrapping up all of the machine work for our customers 1966 396 Big Block Chevrolet. While it is going back together basically stock, does it make sense to balance the rotating assembly?
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Round tuit 😂🤣😂🤣😂 that's pure gold!
I laughed way too hard at that 🤣 had to rewatch it a few times also
Nickolaus, you are living the dream I pursued years ago. I started a motorcycle racing engine shop and as far as I got was boring bar, honing machine, Neway cutters, valve grinding equip, and press for the cranks. I couldn't make enough to cover overhead as we were in a deep recession here in Michigan. I ended up working for the Auto Industry and after 38 years, still love engines. Now retired, I'm going back to the same pursuit, and share your enthusiasm and videos. Thank-you Jim for enabling your son to progress past the basic day to day jobs and build on your accomplishment!
I'm always intrigued by machining. Probably because I am a helicopter mechanic so I am used to balancing rotor heads and drive shafts, but a crankshaft is a different skill set. All of the fine-tuning that you do on all the procedures is a lot of attention to detail. Always enjoy your content.
Ditto. Watching this, I was thinking of balancing the Astar TR driveshaft.
Uh, guys? It's the exact same skill set, you just do it on small parts and it's multiple iterations. The same vibe sets used on helos? Are also used on fixed wing and there is an adapter set for use on cars. I've only seen and used the vibe sets on aircraft, but sat in on a presentation where they mentioned it was used on high end sports car engines like Rolls-Royce and the like. Might be in manufacturing settings, let's face it cars and trucks have drive shafts.
Rolls Royce hasn't made there own engines in over 3 decades...
@@kruszinc.8555 Depends on the industry you speak of. Aviation, they most certainly make their own engines, and are one of the industry leaders.
Automotive, well the car company went under years ago, and today is just a glorified BMW ultra luxury 7 Series.
A cyclic on a helicopter is one of the most amazing pieces of engineering ever designed
Balancing the rotating assembly is usually the most time consuming piece of the puzzle, but it is the best investment you can make in your engine build for smoothness and longevity. Thanks for your time on this one!
Your Dad & his broom really crack me up! 😆😆😆
I love that you explained exactly what the law of diminishing returns is! In the aviation mechanic's industry we called it "unnecessary precision" when guys spent hours and hours going for that last *ONE thou* to get exactly within the center of manufacturer tolerance, that doesn't do anything to affect the performance & reliability.. These younger newer guys just don't grasp the concept of "within spec as best you can and you're done, don't waste time" and it pisses us experienced guys right off 🤬
On the tighter side of the spec is where one wants to be on a rebuild. However I agree, within spec is where one should be. Chasing a measurement error for that last thousandth is like collecting hen's teeth.
@@kevingalat4720 Yep. If spec is between 5 and 7 and it comes up 6.8 on first measure, you're done lol. If it came up 7.8 then I might shoot for 6, but if I landed on 6.8, out the door it goes. Especially in the aviation world where they're paying for maintenance & repair by the hour, not by job. It's balanced great and within spec. Just like this crankshaft
@@Drmcclung True - people forget the work that has already gone into arriving at the specs for safe margins. The specs provide the safety - not the obsession by the next guy to get into the middle of the specs.
@@andoletube Law of diminishing returns man.. it's been a long time since I've seen a machinst point that out on CZcams. Said it before I'll say it again; shops like THIS are so rare these days. Give them your business if you're in their area! 👍
Vibration....is heat/sound/ and impact.....but if it isnt measurable
So refreshing to see that some folks still take pride in doing a job well. Thank you for all the great videos!
I had my 1944 GMC 270 six in line balanced when I did my rebuild and it became a whole different engine runs so smooth and takes higher revs easy and became much faster as far as a truck does. Really like your channel and take notes as I build engines myself. Greetings from the Netherlands!
I definitely enjoyed the "round tuit" skit.
I enjoy your dad's sarcasm.
Every video I watch, I learn something about engines. I'm not a mechanic, don't own any "modified" cars, just own a pick up. Appreciate you attention to detail for what you take into account for everything you both work on. These videos are very well made and I think people who know much more about building engines still appreciate your concern for details.
Enjoy watching your work together. I miss doing stuff like this with my dad. Cherish the time you have with your dad because when they're gone, it hurts like hell. And you will always remember this time.
Round tuits are extremely rare and valuable.
The bob weights I worked with back when dinosaurs needed to be balanced were filled with shot. They had a cup that was secured to the half and internal threads a knurled cap with n o ring. Let me tell ya when the shop cleaning guy at MEM filled the cups and spun the crank without the o ring what a mess.
The balancer was an old analog n dial type but worked good for the dinosaurs. It did have a drill press combined so I 'm surprised yours doesn't given it is solely for that purpose.
Also love the meticulous albeit unnecessary in some view of making all three measurements on the rod less than a gram. For me the harmonics of the rod are more important than the piston package. But then circle track rubber band engines and street rubber band ( high rpm) engines was my focus in the engine shops. Taking stock looking engines for claimer classes and other racers edge was my fun. Angle plug SBC were regarded as boat anchor, MEM machinist and I began tinkering with them until the 450#' 500hp from a $3000 2 bolt block was achieved. Heat treating modified stock x or pink rods experimenting with 5.5 to 6.3 rods making the power curve move up n down the dyno graph.
Life of engine...and Smoother power....
I am glad to see there's still a shop like yours there's not enough of them left it takes that much time to do the job right
I've been a mechanic all my life but never got to hang out at the machine shop.
It's great to see how all of this work gets done.
I drop it off ... You get it done...
Your dad has a great sense of humor. You are a lucky guy.
Whether it's a street engine or a race engine, balancing "pays off in dividends" as you explained. Thanks for showing us how it's done right.
I've said before I like your voice over style.
I also want to commend you on the editing.
I don't make videos but I can tell you spend a lot of time putting together your story.
anybody else remember back in early math classes where we added fractions and decimals all the while wondering WHY? Well.... this video makes pretty darn clear the importance.
Love watching "dynamic-balancing". I built Harley Davidson drag racing engines for a good part of my life. I always "static-balanced" them myself, which is what S&S Cycle recommended. Then as years went on even they went "dynamic". Would have loved to have had a balancing machine. Never had any issues with the "static" builds though. Thanks, cool video.🏁🏁
Give the cleaning guy a raise.
When I get a round tu it 😂
Good to see a young man and his dad working together .
I had a forged and stroked LS3 balanced to less than 2 grams. It easily spun to 7k without any problems. Good work on that 396, they need it since they come apart too easily.
Years ago had the 2L motor in my Pinto overhauled and balanced. Noticeably smoother running. Enjoy your videos and appreciate your attebtion to detail.
It always kills me when people freak out about engine balancing. Having worked in a machine shop before, I can say with certainty that most engines leave the factory with only what I would consider a sloppy attempt at best- and if the engine is never revved hard, it will likely never be what kills the engine. But yet the "experts" on the forums will go on and on about it. If you have the time and the resources, by all means- do it, but if you're slapping together an engine in your driveway to get you to work on Monday, as long as you're using factory style replacement parts, you'll end up doing about as good as the factory did.
You're right. Usually the oem parts are batch balanced and have a general spec deviation that they're allowed.
@@kairu_aname Yep, and those allowed tolerances are usually far in excess of the level that most machinists shoot for.
“Attention to detail is the only proof of sincerity!” This quote is very true for this channel. I was told by an old Ford racing mechanic that the flathead V8 ran “much cooler” as well as smoother after balancing. Flathead V8s tend to run hot due to engine block design so balancing is very important for high rpm performance.
I really like how you guys are explaining this, both in your short videos, and your full length videos. I’m really in the machine work, but my career path is taking me another route however, this is definitely something I want to pursue as a hobby as it satisfies the perfectionist and me.
You better hope,, Sweep Boy don't figure out that broom handle is a weapon.... lols 😎 Ain't it just ain't it...
Doing the right thing even when it’s not the easy thing or fast thing sets apart the hacks and craftsmen
You guys rock
A very interesting process you shared. I had zero knowledge of the skill set you and your father have. Yet, find these videos informational and relaxing. Thank you
I'm just a dairy and crop farmer from Ohio, but I think I missed my calling because I can't stop watching your videos and I'm kind of a perfectionist when I need to be, like ammo reloading and building things to make life easier. Love this stuff, thanks for the videos
It was a real down to earth pleasure talking to you this afternoon. I can even go one further, it was an honor to spend time with a real man, very hard to find these days as the world is in such a mess.
The episode on babbitt bearings was very informative and new to my own knowledge. See you on Utube.
Thanks for watching 🤓
I wish I had an engine to rebuild just so I could send it to you guys to have it done looks like you're doing awesome job
My favorite thing to do as a machinist was balancing engines we are supposed to balance within half a gram when the boss wasn't looking we would get a lot closer. We used to do a lot of Mercedes six-cylinder balancing the rotating Mass was almost perfect but the rods were so far off it was ridiculous we would spend more time to balance the rods
I have the same issue with rod weights here when we rebuild Perkins p1006 engines for the drift runners in the mines, the rod weights usually vary anywhere from 10-100g in the same motor, its a nightmare trying to mix and match rods to suit a balance
Ahem. Above comment....(drmcclung)
There's nothing funnier than seeing two contradictive paragraphs right next to each other.
Is that the algorithm or is that just the odds?
@@thecloneguyz Lmao our shop likes to do a quality job, so i always do my best to get rod weights for commercial engines within a few grams when i balance them, for big engines within 5-8g, and within a gram for performance engines, but i suppose thats what you expect to get when you pay for quality
07:59 Wow! Those cleaning help. They have such a Tude! Just give them a raise already!🤣👍
I absolutely love the fact that the Danish butter cookie tin is being used, not just for sewing supplies, but to also hold the new weights he was making! 😆
I had my 1973 German 2 liter engine rebuilt and balanced. The smoothness afterwards at 80 mph was really a delight.
I love watching you guys work…. If U wasn’t so far away, I’d have you build one for me…
Years ago I had a shop overhaul a Ford 302. They asked if I wanted it balanced. I had no experience with it, so they explained it to me. I said Yes.
When I drove the car, I couldn't believe how much smoother it was! It used to have several spots in the RPM range where it would vibrate, but now it was silky smooth.
Wow, what a difference! Any future overhauls will include balancing for sure.
Gents, I can't commend you highly enough on the attention to detail and quality! You're dad "done well"😁 Its refreshing to see quality in a world of just getting by! Live the channel and content!
Probably the only Chanel on CZcams that I agree 100% with.
Oh man I forgot about round tuits... Glad there's someone still making them!
Limited run lol, don't want things getting out of hand
Watching you guys at work is amazing, and reminds me of the time, years ago, where I worked at a machine shop. Progressed from the floor sweeping guy, to the core engine teardown and cleaning guy, and eventually to the assembly guy.
This was surprisingly interesting. Its always good to see someone motivated to fix an issue at work instead of just "putting up" with it.
It's nice to watch videos that get to the point and stay on point
My first "automotive" job in 2002 was working for an old boy who'd forgotten more than I'd ever learn about machining. Engine balancing was my favorite. Manually hone boring blocks was my least. Keep up the great content!
I can imagine that it's a lot more effort to record everything while you already have to concentrate on the work that you're doing, but it sure is appreciated.
Thanks for teaching us folks at home who aren't always able to learn these things in the real world.
Being semi old motor head, I really enjoy your videos. Thank You
Finally! Someone has answered all my crank balancing questions. This is no doubt the best, most thorough crank balancing tutorial on CZcams!
When I was a working mechanic I put this level of care into every single job. I understand completely, you guys are pros!
I wish I had a machine shop like yours doing my engine machining!
Always worth sticking around till the end.
This is the reason I pop in to watch you guys, you give a dam about what you do! As you mentioned, people would say "why bother about 1 gram!!" well, because why not?! You're there, the machines are there, just get in, get it done! You're happy and the owner is stoked for the workmanship and care you've put into his machine!
Love your content. I work in a family owned business with my dad for over 20 years. Good to see these things. Keep it up.
As a novice, aspiring mechanic, the simple act of weighing the components (like piston heads, rods, pins) before installing is a no-brainer, but I would have never thought about it. Thanks for teaching .
Your patience and persistence of perfection are amazing, as well as your judgement calls regarding the point of diminishing returns. There are life lessons here regarding pride of craftsmanship that go far beyond mechanical engineering. Treasure the hours that you and your Dad get to work together. Well done!.
A little tip on the chips, put your magnet in a plastic sandwich bag and pick up the chips, then remove the magnet and the chips fall in your catch container. I use this method to clean the chips from my lathe and mill. Good job on the video.
Love watching you machine stuff, and the old dude on the broom needs to up his game 🤣
Nice job. Wish there were more shops like yours.
Great Video. As a desginer of gas turbine engines and other turbo machinery with as much as 120,000 rpms, it's interesting to see that the balancing process of crankshafts is similar (except for the reciprocating mass). Even at 120,000 rpms we never try to balance the rotating mass to 0 gram-inches. We always balance to the minimal acceptable imbalance. Spending the time to balance the crankshaft has a very high benifit-to-cost ratio. It can add horspower by allowing you to operate the engine at higher rpm (hp = torque * rpm) and also extend the life of the engine by reducing vibratory stresses.
Great video!
I love how your mind works. I could never do what you do
There's a special moment in a dad/son shop where dad KNOWS son has learned WELL. I guess you never stop being a parent but what contentment results knowing son is now a man!
The attitude on that cleaner guy
My word it is worth it! A well balanced engine lasts longer in general. This is a good professional shop with very good practices. Love your new waterjet. I always watch to the end, no matter what!
I absolutely love the Precision that you use in setting up engines, but the addition of the levity in the video makes it really more interesting and it is also a good break in between all of the complicated numbers and calculations that are used and I understand they are so essential to making a very good quality job in an engine, I appreciate the work that you do and I also appreciate in the manner that you show it thank you very much Jim.
JAM,
I truly enjoy your videos and knowledge of engine building and machine work. You need to start looking for a new janitor that will not drop his broom. Boe
Thank you for videos like this, the knowledge you are sharing is valuable beyond measure.
I so appreciate how you work and how the shop is run! Thanks for sharing 👍🏼
wish I have a chance to work with my dad, in anything. happy for you guys...
Absolutely awesome precision and meticulously fine tuned work!!! Hats off to you guys 👍great content thanks for sharing !!!!
Fascinating video. The explanation of what you're doing at each step is brilliant. I watched the crank grinding one the other day & I never thought something like that would catch my attention. Keep up the good work.
You are not machinist,, you are magician,,, great work
I just discovered your videos, and they are great! You and your father both are very good with your explanations.
Your guys ability to pass info through the camera is amazing. I sincwrely appreciate your efforts to work around the camera for the benefit of all of us. And the played up orange county choppers drama is more entertaining than I'd like to admit lol. Once again, thank you for doing what you all do.
Love your video's and your attention to detail. Please keep up the great work.
I watched the whole thing. I’m glad you shared it. I really enjoy this meticulous work, I’m a detail oriented person!
Great job on this video content. I've always wanted to understand how the balancing process works. Thanks again for your time today.
Love everything about this! Keep up the great work 💪
Thanks for keeping this alive so many speed shops gone
love this, rebuilding by small shops is becoming a rarity
No it isn't. You people talk like back in the day there were machine shops on every corner.
Thanks for the lessons and the clear voice and language.
awesome work on the crankshaft!!!
dang near got it perfectly done at close to zero balance !!!
Happy that your explanation and work clarified my understanding of the bob weights. Good job.
Anyone that claims "balancing" a street engine isn't needed, is a fool. ALL engines should be balanced as close as possible. I've seen first hand to what happens to an unbalanced engine. It will destroy itself in a short amount of time. Then it becomes a huge loss of time and money.
Nothing wrong with attempting to get as close to spot on as possible, even with diminishing returns. As you have said, the extra work now, just saves a ton of time later. Not many understand that. I think that, in this field of work, this is why I feel your channel is the best available for all to see and learn. Great video as always, cheers :)
Love watching all the aspects of engine machining. Balancing and engine make sence to me. Whether it’s for racing or just a daily drive better performance. Thanks for sharing.
i made a round tuit mold back in the early 80s in school...........its still funny 40 years later
When I was doing my apprenticeship I remember walking past my boss as he switched on the balancer with a 351 Cleveland assembly in it that started to shake really badly, he had his arms out ready to catch it. I pulled him back by his collar and hit the emergency stop. He wasn't happy with me but he still has arms and the crank survived. He was a strange rooster, he wasn't going to switch it off, and it was definitely coming out of the machine.
Great stuff!! I love seeing how a true craftsman does things. 💪🏻💪🏻👍🏻
Great video! Brings back memories when I had my older Camaros and the work I had done on them.
Great explanation of the balancing !
LOL I haven't heard of a round-to-it since I was a kid. Thanks for the info and your work putting these videos together!
I watch your channel alot, and always surprise d how accurate you and your machines are, and then you take it one step further and make it perfect, very impressed with your quality of workmanship !!!!!!!
I took a ride in a balanced 396 and it had as much power as a 427 I thought just from the feel and acceleration! WOOT!
Nice video. First time I've seen a crankshaft balanced. Now you have me thinking about my own build. LOL
Very interesting video. I used to do industrial balancing. I noticed that it looks like some sort of nylon bearing that you spin the crank up on. We had what was called hard bearing balancers, which always left a slight mark on the journals.
Also I totally get chasing that last little bit.
Good work. You are very particular, great to see!!!
Loved seeing the dollar bill and tape as an easy reference to the tolerances you are trying to achieve.
Meticulous is an understatement.
Fantastic work.
Love your videos. They are so informative!