The 'Not So Dark Art' Of Engine Balancing | Engine Building Basics 02/04

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The 'Not So Dark Art' Of Engine Balancing | Engine Building Basics 02/04

Рет қаралды 45,075

Күн бұрын

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In this performance engine building lesson you will learn what engine balancing is and where to remove material from when balancing your pistons and or connecting rods (con rods).
You will also learn what a harmonic damper is and why you want one along with how you can minimise the amount of material you need to remove from your rotating assembly when you match your heaviest components with your lightest before you start, making the task a lot easier as an added bonus.
Note sometimes the task of balancing your engine is referred to as engine blueprinting. This is not strictly correct, as blueprinting is when you are working to weights set in advance, not just balancing to even things out in general. As discussed, harmonic balancing is also entirely different and a common area for confusion.
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TIME STAMPS:
0:00 - Why Do We Balance Engine Components?
0:48 - Inline or Horizontally Opposed
1:32 - V4, V6 & V8 Etc
1:48 - V Bob Weight
2:15 - LS V8 Situation
2:48 - Piston Balancing
3:35 - Wrist Pin Consideration
4:22 - Piston Weight Removal
5:28 - How Much Material Should You Remove?
6:06 - Avoid These Areas
6:48 - Connecting Rod Balancing
7:40 - Con Rod Balancing Fixture
8:06 - Big End Weight Removal
8:20 - Don't Weaken Your Con Rods
9:31 - Linisher
9:48 - Small End Weight Removal
10:58 - Don't Overheat The Rods
11:20 - Engine Machinist & Rotating Assembly
13:32 - Harmonic Balancing Is Differnet
14:20 - What Are Harmonics?
15:45 - Common Failure: Oil Pumps
16:08 - SFI Rated Dampers
16:55 - Consider A Damper
17:11 - Lesson Summary & Next Lesson
17:30 - BUILD.TUNE.DRIVE
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Пікірлер: 32

@hpa101 2 ай бұрын

Building a fast car? Get $400 OFF the VIP package with every current and FUTURE course included: hpcdmy.co/vipy9 Learn Engine Building today with 50% OFF your first course: hpcdmy.co/offery9 TIME STAMPS: 0:00 - Why Do We Balance Engine Components? 0:48 - Inline or Horizontally Opposed 1:32 - V4, V6 & V8 Etc 1:48 - V Bob Weight 2:15 - LS V8 Situation 2:48 - Piston Balancing 3:35 - Wrist Pin Consideration 4:22 - Piston Weight Removal 5:28 - How Much Material Should You Remove? 6:06 - Avoid These Areas 6:48 - Connecting Rod Balancing 7:40 - Con Rod Balancing Fixture 8:06 - Big End Weight Removal 8:20 - Don't Weaken Your Con Rods 9:31 - Linisher 9:48 - Small End Weight Removal 10:58 - Don't Overheat The Rods 11:20 - Engine Machinist & Rotating Assembly 13:32 - Harmonic Balancing Is Differnet 14:20 - What Are Harmonics? 15:45 - Common Failure: Oil Pumps 16:08 - SFI Rated Dampers 16:55 - Consider A Damper 17:11 - Lesson Summary & Next Lesson 17:30 - BUILD.TUNE.DRIVE

@stevencrellin9842 6 ай бұрын

Factsstic video. As a mechanical engineering student it’s great to see everything I’m learning with dynamic and static balancing in real application

@michaelduff3869 6 ай бұрын

Dope! I’m a 2nd year mech e

@user-zu2ed6ye5w 3 ай бұрын

That is the correct way to balance the rod, get the big ends all the same weight, then take the total weight of the lightest rod and match the other rods to that total weight by grinding the small end, the reciprocating weight is more critical than the weight going up and down! Great job ! I balanced engines years ago, was taught by a very intelligent man ,thanks for teaching the right way !

@chriso1373 6 ай бұрын

Good timing on this video. My new pistons and rods are showing up this week and this was the next thing i needed info on ❤

@hpa101 6 ай бұрын

Exciting stuff mate! Hope you are enjoying the building process so far, although it always ends up taking a bit longer than we want or plan right haha - Taz.

@mrd.808 6 ай бұрын

Boss Andre s the MAN. How every teacher/instructor should be ❤

@ChiefCabioch 6 ай бұрын

If you're trying to get the balance better than 1/4 ounce inch you are waistng time and money

@pedrorocha870 5 ай бұрын

Fantastic video, I learn a lot with your videos! Thanks

@ChiefCabioch 2 күн бұрын

No matter how close you get the weights of components the same, you still have one variable you can't compensate for, and that's the difference between oil trapped under the piston on the up stroke verses oil under the piston on the down stroke...and if it has piston cooling jets under the piston it makes any compensation even more difficult...

@hpa101 2 күн бұрын

Yup;! You can only control what you can control, unless you are a well funded F1 team etc, not that you are competing at their level anyway. This work shown is easy low hanging fruit comparatively 😎 - Taz

@ChiefCabioch Күн бұрын

@hpa101 what was that word salad all about genius?...for the record you don't have a fuckin clue what I'm involved with...

@TD5rage 6 ай бұрын

Great video at a great time for me building my engine. Would you say that this could be applied to diesel engines aswell especially a 5 cylinder?

@chriso1373 6 ай бұрын

Mercedes? Those are cool engines

@majorva2653 6 ай бұрын

you should mention that the reason for v engines being balanced differently is the not symetrical crank... a v12 with 60 degrees for example has a pretty much regular straight 6 crank

@ChiefCabioch 6 ай бұрын

Inline engines don't use Bob weights

@majorva2653 6 ай бұрын

@@ChiefCabioch that's what I'm saying , inline 4-6 engines and V12 engines don't need it cause most of the time they have a symmetrical crank shaft

@ChiefCabioch 6 ай бұрын

@majorva2653 a Detroit Diesel V12 would need Bob weights, there are twelve independent throws on the crank.

@majorva2653 6 ай бұрын

@@ChiefCabioch it's not symmetrical then so it needs some with a split pin crank xd

@magnusdanielsson2749 6 ай бұрын

Doing a 60 deg v60 I found that engines are done with a 25 to 55% of the reciprocating weight. GM specify 50% for this engine. But seeing how the span is so big from engine to engine it begs the question how important it is exactly to balance the crank. Also you have the question of what part of the rod is actually the reciprocating weight.. My machinist adviced against it actually. He pressed instead on having the rod/pistons beas close to each other as possible. Since Ive lighten them some 30 gr and are within 1gr och each other he argued that its a big improvement even without balancing the crank. Also since its a street engine with 6000 max rpm youre not in danger so to speak anyways.

@anangelshero0410 6 ай бұрын

Okay, so do I WPC treat and DLC coat my engine before or after balancing? I think it's done after but before assembly. I'd just like confirmation or correction as necessary.

@ChiefCabioch 5 ай бұрын

8 grams, 8" from center at 8000rpm = 112# of out of balance force, a US currency is close to 1gram , you are dealing with a few variables like oil on the downstoke verses the up stroke.....

@user-kw7zb8qw1u 6 ай бұрын

Balance ⚖️ crankshaft with flywheel attached

@oikkuoek 4 ай бұрын

Wait.. Did the presenter change half way through the video?

@MarvinConnell 6 ай бұрын

Can we discuss this some more? The people who advocate solid under drive crank pulleys say that after a while, the 2 piece, rubber sandwiching harmonic pulleys' rubber get hard, & therefore, they essentially become a solid pulley, & nothing negatively happens to the attached engine(so it's theoretically safe)... What are your thoughts & advice with that in mind? (I am STRONGLY for the improved efficiency & available HP of lightened smaller diameter pulleys\REALLY TEMPTED) Thanks... =]

@bandini997 6 ай бұрын

Fucking hello yeah. U r the best

@ChiefCabioch 5 ай бұрын

If you are trying to balance an engine closer than 1/4 ounce inch you are wasting time and energy and if you are running above 7000rpm most of the time you need to put some over balance to the reciprocating weight of 3%-4% and if you run in the 9000 and up range go to 5% added to reciprocating numbers...

@EliteMacFreak 2 ай бұрын

3:00 "A quality set of digital scales" - pulls out the cheapest and literally worst scale on the market.

@hpa101 2 ай бұрын

We paid $150 USD then $300++ USD for some USA made scales from a well known company that didn't work as good as this $30 set which we bought out of frustration and curiosity. As discussed, repeatability is important, and that is easy to test. You're not weighing Grandma's medication; you're weighing the difference and a lot of the GOOD quality cheaper scales will do that just fine 😎 That said, you can purchase and use whatever you like, this is just what we used and found worked accurately for us. Painters scales are often mentioned by enthusiasts as being a good option too - Taz.