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  #1  
Old 10-30-2002, 06:07 PM
ScottPuddintane ScottPuddintane is offline
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Default 440 6-Pack 4-speed Engine Balancing

Hey Guys,

I've got some questions about the "big-rod" 4-speed 440's. I know that they use a different harmonic balancer (got one).

1. Are the CRANKS the same on big-rod & small-rod 440's? At least is the balance the same?

Another way to look at this question...... Is the external balancing on the 440 6-pack motors ALL in the harmonic balancer and flywheel/torque converter?

2. Who sells 440 big-rod weighted flywheels?

3. Has anyone ever drilled out a zero-balance flywheel for big-rod 440 balancing like the old Direct Connection Engine Manual shows? How did it work out?
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  #2  
Old 10-30-2002, 06:36 PM
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6 packin 6 packin is offline
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You need to get a Mopar chassis manual! It tells you how to balance the engine flywheel for the heavy rods! There is a differance in the heavy rod cranks and standard cranks! All 440 with steel cranks are INTERNAL BALANCED! But balance different due to the weight of the big rod. Its easy to balance a heavy rod crank for use with the stock small rods. Just cut material off the weights. It however hard to take a stock steel crank and use heavy rods, because the add mallory metal to it very time consuming and expensive! This is all covered in the chassis book! I know the 8th edition has it because I have a copy! A stock steel crank and factory rods will run better (REV). And outlast a million chebby steel cranks .
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  #3  
Old 10-30-2002, 08:00 PM
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lenweiler lenweiler is offline
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Scott. Are you really committed to that big heavy rod. There really is no performance reason to use it. A lot heavier for the sake of a wider beam. Not a good trade-off.
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Old 10-30-2002, 08:26 PM
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hey 6-packin,does that flywheel trick work on 400 engines too
and where can i get a copy off the chasis book

thanks Rider_2002
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  #5  
Old 10-31-2002, 01:16 AM
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Mopar is wierd about how they leave out info from edition to edition! I bought a 8th edition chassis manual for a purpose of balaning a 360 flywheel (car) from a 318 flywheel! Well seems they left that one out! But 7th edition had it go figure! But any local mopar dealer can get it just thumb through a copy of Mopar muscle or mopar action for part number on the latest chassis manual! But here some info!

I have detailed info on balancing a 340 steel flywheel to a cast 340 flywheel!

It just says howmuch amount of unbalance added to flywheel
383 & 400 cast engines is 12.9 oz but doesnt say were??

Im sure different chassis manuals edition have more info on this but not 8th ed!
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Old 10-31-2002, 08:55 AM
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Thanks six-packin,I wiill get right finding a copy of the 7th edition
as soon as i get off here,do they print one them chasis books for trucks too,or is it all included in one


Thanks , Rider_2002
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  #7  
Old 10-31-2002, 09:06 AM
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Default Ballance

On a big block .
If your engine is externaly ballanced and you wish to use an aftermarket stall you will require a weighted flex plate available from summit for $75.
If your engine is externally ballanced and you wish to use a manule trans the crank should be removed and ballaned with the flywheel and ballacer installed.
There is a picture of a flywheel drilled for ballanceing as such in the mopar book.
However it is only a picture.
It does not give any true refferance point as to the location of the holes to be drilled or the exect depth for each hole.
This picture was meant to be simply an example and no more.
So don`t be miss lead by it .
It is not what it apearse to be.
Been there done that.
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Old 10-31-2002, 12:55 PM
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Dirty Dan has a good point! Thise pics will get you close as a well put togather chebby engine put togather by a Grumpy old man, but it also would be nice to balance them as a family. This will premote long bearing life, which will make everyone happy! Except the local chebby machine shop. Cause he done rebuilt the same 350 299 times!
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Old 11-02-2002, 05:07 PM
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So in other words the best way to put a 4 speed in my truck behind a 383 would be to have the crank flywheel and balancer all done at one time,also which fly wheel would be best,an oringal
or after market,this is starting to get a little confusing,maybe i should just keep the auto?????????????

Rider_2002
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  #10  
Old 11-04-2002, 08:39 AM
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As far as I know, things only get funky when you run a cast crank. Then you need the flywheel to match. The 383 should have a steel crank and therefore the motor was balanced internally. Just find a fly wheel for a forged crank, factory or aftermarket and you'll be fine.
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