VW/Porsche factory balanced (crank) good enough?

Jake Raby · Posted: Mon Dec 28, 2009 7:01 am Post subject:

Sounds like you should have paid more and dealt with a more stand up company that would stand behind what they sell. I've been known to exchange components FIVE YEARS after they were purchased if they had never been used and had a problem.

THE BITTERNESS OF POOR QUALITY REMAINS LONG AFTER THE SWEETNESS OF LOW PRICE IS FORGOTTEN

If those rods had been subject to proper QA they would have never been shipped, then the problem would not exist. Tell that to the seller when you call him up and tell him to shove his rods up his ass.

Absolutely unacceptable. 30 days my ass.
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gooser · Posted: Mon Dec 28, 2009 7:14 am Post subject:

at what rpm does balancing become beneficial?

Type 5 Joe · Posted: Mon Dec 28, 2009 8:27 am Post subject:

Well please don't be shy about listing the supplier and the manufacturer of these parts....

Did you know the reputation of both these company's BEFORE you ordered?

You have to wonder if people are warned about dancing in a mine field...

Then they cry because they are not willing to buy good quality prosthetic legs for themselves....
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nextgen · Posted: Mon Dec 28, 2009 10:01 am Post subject:

Gooser,
Of course the faster the RPM the faster you will damage an unbalanced engine, but you can also feel the difference at idle.

So to answer you question. I would say all speeds, the difference is the greatest stress on the parts will be at higher speeds, which can lead to a faster engine failure.

Years ago I did my first 1600 and this was the engine that came new in my new 1969 bug. When I had it balanced at 80k with all the stock parts it idled like a sewing machine, much smoother then when I drove it out of the dealers lot. Wound up like a turbine. Even people that had no VW engine experiance said, wow that thing is smooth. Stock 50 hp.
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Jake Raby · Posted: Mon Dec 28, 2009 11:47 am Post subject:

Mr. Unpopular · Posted: Mon Dec 28, 2009 12:43 pm Post subject:

thepadawan · Posted: Mon Dec 28, 2009 6:19 pm Post subject:

the crank and rods are EMPI, I was told numerous times that there quality had improved (i have dealt with crap from them before). Figured Id try them out.

the funny thing is I have run the chinese 4130 h beams that i got for 199.99 before and loved them, heck I balanced those suckers (like I KNEW i would have to but then again each rod was MUCH closer to each other then this) and never had a problem, those have gone 9K without a problem and have seen 15PSI before...

tells yah a little something about the industry..

Rowroy · Posted: Tue Dec 29, 2009 6:21 am Post subject:

Type 5 Joe · Posted: Tue Dec 29, 2009 7:55 am Post subject:

Maybe by the person who sold them.... And won't return them after 30 days.
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nsracing · Posted: Wed Dec 30, 2009 9:08 pm Post subject:

"neutral balance"?

thepadawan · Posted: Thu Dec 31, 2009 12:38 am Post subject:

3 different vw parts shops in so cal, o well ill just go demello again!

Luis ''Diablo'' Gutierrez · Posted: Thu Dec 31, 2009 1:02 am Post subject:

so if i get a new crank, flywheel,pulley and rods, do i have to take them to the machine place to get it balance?

Im just learning about balancing

thanks

Mr. Unpopular · Posted: Thu Dec 31, 2009 6:35 am Post subject:

grimace007 · Posted: Thu Dec 31, 2009 6:56 am Post subject:

nsracing · Posted: Thu Dec 31, 2009 7:42 am Post subject:

Mr. Unpopular · Posted: Thu Dec 31, 2009 8:00 am Post subject:

jeesus christ why are you guys making it so difficult. Zero balance (or as close as you can) the PP, that way, any other PP put on the motor later just needs to be zero balanced (or as close as you can) rather than "15 grams heavy clocked at 7 o'clock". They've been doing this in the V8 world forever, it can't be a foreign concept.
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BugMan114 · Posted: Thu Dec 31, 2009 5:53 pm Post subject:

I don't understand the concept of bolting everything together to balence after everything has been individually balenced? if you balence everything individually, then how could it be unbalenced once you bolt it up? is it just the small tolerance (be it .5 gram differnece), added up among all the parts? If thats the case, then on what part do you add or remove material to balence the whole thing once its been assembled? so lets say when you bolt everything up, and it comes out to 1 gram out of balence (not sure what the normal unbalence is after individual balencing, just an example), where would you remove that 1 gram? i would think where ever you remove that 1 gram from, would then make that part unbalenced, no?

Thanks
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Why the hell do they call it a gland nut. its obviously a big fat bolt!!!

nsracing · Posted: Thu Dec 31, 2009 11:24 pm Post subject:

Where to remove the unbalance?

You will need a Dynamic Balancing machine to "see" where this unbalance is. The machine can tell it to you exactly in degrees where is the heavy side.

Not only the machine tells you in degrees, but in what plane it is in. Left side or Right side.

Bolting it up and indexing the parts will assure the ultimate in keeping the parts stay balanced.

Also, there is a certain tolerance you use for a specific application. You don't need a Full Race balance if you are only going to spin this thing 3000RPM.

BugMan114 · Posted: Fri Jan 01, 2010 6:36 pm Post subject:

but i still don't quite understand how it could possibly be unbalenced if you balence all the parts individually? am i missing something? sorry for the newbish questions, lol.
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1974 Super Beetle: Custom resto in progress
1972 Super Beetle: Daily Driver
1971 Std. Beetle w/ 1929 Mercedes Benz Gazelle kit
1960 Baja Bug
1969 Baja Bug
Sand Rail- Homemade
Sand Rail- FUBAR

Aircooled Airheads

Why the hell do they call it a gland nut. its obviously a big fat bolt!!!

modok · Posted: Fri Jan 01, 2010 6:41 pm Post subject:

If you were to balance the individual parts on the EXACT same centerline of rotation as they will have on the engine then they will be balanced.
But this is near impossible to do.
The pressure plate for instance is not going to be perfectly centered, flywheel runout can be .005".
Even .001 off center makes a difference.


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