Subaru Flywheel lightening and Balancing

[Blackdavid2011]

could i ask a question? why are you using no emulsion or some kind of cooling when you are doing this on a lathe?

[elitecssplayer]

This questtion is probably asked alot but I want an answer to... What would the average price be to get a manual (5-speed) flywheel resurfaced and balanced?

[EwansClass]

4 people have lost his fingers trying to balance the flywheel

[fiatnutz]

@EwansClass - No lost finger here!

[U3erpru7ser]

Hi there, I was wondering what the effect of rust on the flywheel and pully would be?

[fiatnutz]

@U3erpru7ser - faster wear on all the rubbing components in general. Why is there rust on the flywheel and pulley, anyway? You must be dealing with another engine and not the original - I'm only guessing here?!?!?!

[U3erpru7ser]

@fiatnutz Most older engines have rust on the flywheel and pully. Its usually an evenly dispersed layer of rust but i think it could upset the balance in time. And what would happen when one would remove the rust with a wirewheel?

[fiatnutz]

@U3erpru7ser - Depends on how much is there. Surface rust will not kill you, deep pits will.

[fredjahnert]

This does not improve the car. It can lead to oscillations at higher speeds which can break the shaft/decrease performance and lifespan. You are not a mechanical engineer, they designed it for a purpose.

[slingblade1991]

@fredjahnert Oh jeesus...its called modification.Of course it won't dampen harmonics from the crank as well,but it will allow the engine to rev faster. you lose some you gain some

[chimaera1855]

hi i am changing my TVR chimaera 4 litres V8's clutch this week.was wondering about doing some work on my flywheel.....its use a rover V8 4 litres and a T5 BG i bought an HELIX racing clutch.any help....tks a lot..

[fiatnutz]

@chimaera1855 - Have the flywheel resurfaced and then balanced with the clutch cover.

[ghettobraden]

the flywheel wasn't true, either that or it was on the machine crooked, I have turned many many brake rotors and that noise of the cutter cutting deeper then shallower, and the flywheel wobbling is a tell tale sign of something being mis aligned.

[urbex2007]

This is really interesting - with all the work you do to improve things, why don't the car manufacturers do all this work when they build the engines???

It seems a lot of cars are thrown together without much thought given to the design.

[fiatnutz]

@urbex2007 - The manufacturers do a lot of R&D on their cars before the ever see the light of day. You don't want to have an engine that is like a light switch with regards to power. As an enthusiast you can appreciate this fact, but having this type of power band in the snow, or for grandma to drive is not so good. Mfr's have to give everybody something so they can sell their cars. That's the fun part for you to see just how much additional power you can get out of their products.

[twodeadpoets]

@urbex2007 Also manufacturers are constrained by output cost vs input costs (what they put out vs what they get). And as @fiatnutz said, they aren't designing a $20k F1 car for the masses.

[ralekriver]

Aha! Much like a brake lathe process followed by a wheel balance! I never thought it would translate so 'simply'. Also, we generally added weight to rims, not take material out, dont we ;)

[trimbot6]

What was the weight of the flywheel before and after balncing? How much lightening do you recomend for mid to high performance street V-6's with manual trans? Thanx.

[beastman5566]

how much did it lighten it lol?

[1971ojoalparche1971]

This is interesting. What are the advantages of lightening a flywheel? Why don't cars come with lighter flywheels from the factory? Thanks.

[SorsanSuuriAfro]

@1971ojoalparche1971 Lighter flywheel lowers total weight of moving parts, making the car pick up and lose revs faster. Factory flywheels are heavier, because heavier flywheel can store more momentum, making engine run stable and providing good low-end torque.

[1971ojoalparche1971]

@SorsanSuuriAfro Thanks for the info.

[green95gt]

anyone know the diameter of this thing?

[EdSabbath]

@RJDGGG86 carbide blade on a milling lathe like this doesn't need lubrication.

[ToWi1989]

anyone who can link some info about how balancing macines work? only found 1 proper movie about it

[jr9950]

Just curious, what does a balancer like that cost? Complete setup

[fiatnutz]

@jr9950 - About $22K

[kyosho94]

@fiatnutz thats a lot

[deadbeat86]

@fiatnutz HOLY SHITBALLS!!! really?!

[dwnrety1]

@fiatnutz and how long does it take for that balancer to "pay for itself"?

[superchargedM90]

How much do you usually charge for something like you did?

I have a Ford 3.0 V6 flywhell and i would like to make it lighter. Is that possible to do?

[bad66chevelles]

most annoying sound ever lol

[panjo1985]

nice work!!

[mbcyclery]

interesting driving method vs end driven with a flexible union. must be a fun to calibrate the location of power transfer.

[sneekmatrix]

very interesting john - u make it look easy

[nukemutant187]

It really took it down to 8.5? what Subaru is this from? I know the stock WRX flywheel is between 22-25lbs and the STI is 18.9lbs and my EXEDY is 13.3.

[parad9gm]

@nukemutant187

Well, recall that he's modifying this for a blower motor--not a Subaru transmission. Machining that off and sticking it on your 2.5L turbo motor would probably result in a shower of shrapnel.

[monsterrmann2244]

When cutting off that inertia ring, isn't it good to use cutting oil or some type of lubricant so it doesn't do damage?

[bonante2004]

Cast iron can be cut with out using coolant.

[gst69man]

Hi john, interestig vid. Did I notice delrin pads on the balancing machine where the shaft sits/rotates. Did you manufacture the balancing machine yourself?

Thanks

[fiatnutz]

The balancer was produced for Sunnen by Fentech in Fenton, MO.

[colin340]

hey john what do u mean bye "blower motor"

[fiatnutz]

The guy is installing a Roote-type blower on the engine.

[ralekriver]

@colin340 Roots-type blower, meaning Supercharger, just for clarification ;)

[arnoldii2]

what kind of background education do you need to do work like this in an actual shop?

[fiatnutz]

I'm teaching an engines class at Golden West College right now - 2 nights a week. Take this calss a couple of times and you may be about ready to get your hands dirty.

[arnoldii2]

I'm still in high school and almost all the way across the country so probably won't be able to make that class lol I am in auto shop though. This type of work is very interesting to me. What kind of pay is there in machining work like this? Thanks for the advice.

[MagicMiura]

Amazing

[pantherxx010]

wow John is that balancing machine also used to balancing crankshaft as well?

[fiatnutz]

Yes.

[error079]

Thank you mr Edwards! I allways wanted to know how that is done.

[citydriver]

damn that screamin  hurt my ears

[arabrockerman]

I was kinda curious how do you know where to make the correction and what do you use?

[zapwatt]

Looks like he used a large drill.

[fiatnutz]

The machine has a rotary encoder that tells me the location of the imbalance, I go to that point and remove the necessary amount.

[arabrockerman]

Ok thanks for the reply.

So that tells the location in degrees and does it also tell the distance from center?

I'm second year Engineer student so I haven't got to this sort of thing yet and I've built engines but just sent everything to the machine shop so more or less assy engines I should say.

So im a little ignorant to machining although its relative to what I do and want to do in the future.

I say all this to let you know how much I do appreciate you posting these videos.

[ISUZU1987]

nice

[30GB]

very nice job

[Chevypower265]

How much weight did you end up taking off of it?