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Author Topic:   Balancing rods and pistons
Smallblock
Dirt Roller

Total posts: 10
posted January 05, 2003 04:56 PM
I'm building a 383 and I'm looking for a good website that tells how to balance them the right way.Anybody know of one?
Also I'm going to be using the Late model LT1 Pm rods and they don't have any balancing pads. Are they that close in weight from the factory that they won't need balanced?

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4barrel
Dirt Full Roller

Total posts: 26
posted January 12, 2003 09:43 AM
How are you going to ballance the crank? I think you should take the rot assy to a good machine shop and pay them to do the job for you.After 15+yrs in the ballance Industry I Know its not something anybody can do.Just my 2 cents.

Smallblock
Dirt Roller

Total posts: 10
posted January 12, 2003 12:35 PM
I was going to balance the rods/pistons my self and then take the crank to a machine shop and have it balanced.

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Flatlander
Dirt Freak

Total posts: 310
posted January 12, 2003 10:00 PM
I gotta agree with 4barrel the whole assbly needs to be worked together to be right a383 will sling it's guts out if it's not right

neverenoughbrew
Dirt Forum Racer

Total posts: 82
posted February 13, 2003 09:33 AM
Good rods and pistons are close in wieght match and do not require to great of grinding on. If a person has a good set of digital scales, there is no reason they cann't weight match there rods and pistons themselves, and give the crank balancer the bob wieght to work with. just my 2 cents.

Smallblock
Dirt Roller

Total posts: 10
posted February 13, 2003 09:59 AM
I have a set of digital scales and all of the rods are with 1 gram of one another.I thought if i got the pistons and rods Assemblies weighed then i could tell the machine shop how much they weighed and they could set up the correct weight.

hogracer
Dirt Full Roller

Total posts: 31
posted February 14, 2003 12:01 AM
You guys must have more dollars than cents, If i'm not mistaken rods are weighed end by end , and balanced to the crank by bob weight, which includes the total sum of the rod , bearings, piston,pin,rings. Save your self some money and let the people who have invested the required $10,000.00 in the Hines balancer do the dirty work. Learn by our mistakes-- Dave

Racer111
Dirt Full Roller

Total posts: 54
posted February 15, 2003 08:52 PM
The money you save by doing it yourself buy a metal detecter so you can find all of the parts in the track !!!!!!

jnewman44
Dirt Full Roller

Total posts: 72
posted February 15, 2003 10:40 PM
One end of the rod rotates(goes in circles), the other end reciprocates(moves back and forth in a even plane) The big end of all rods need to weight the same , the small ends all rods need to weight the same, and all the rods need to have the same total weigh. I once considered doing this myself for the pleasure for it. Dont bother,what will it save ya? $50.00. where I live it costs $150.00 to have it done, cheap insurance.

Gene
Dirt Freak

Total posts: 230
posted February 16, 2003 03:52 AM
Raer 111, great post , I agree 100%

Smallblock
Dirt Roller

Total posts: 10
posted February 16, 2003 10:40 AM
Well since I've done all of the machine work on my motor myself so far I just thought that maybe I could add balancing the rods and pistons to the list.
Guess I was wrong.

Darcy
Dirt Full Roller

Total posts: 54
posted February 16, 2003 08:35 PM
i have t agree with racer 111 and leave the balancing to the pro's it will save you a lot of heart ake later

Daleepo
Dirt Roller

Total posts: 17
posted February 18, 2003 07:41 PM
I think it is wonderful that you want to do the work yourself, My 2 cents says...If you have properly reseached the process and can come up with good enough equipment, do it! You gotta learn sometime. If it were me, I think I would play with a junk set first. Since you have done machine work before, you may ask the engine shop guy if he would consider letting you do the work at his shop, it's a long shot, but if you really want to know how to do it...ask

Roadhzrd
Dirt Maniac

Total posts: 138
posted February 22, 2003 10:58 PM UIN: 28276986
If you have the tools to do this go for it. It's a simple process that shouldn't be attempted by simple people but you seem to be intelligent enough and the $150 you save you can buy a rod balancing fixture. If you need the rods re-shotpeened in the blended areas let me know.

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