engine balancing
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engine balancing
Hey guys i got kinda a stupid question, what exactly does engine balancing consist of? I bought a set of hypereutectic pistons for my 400 today and it needs to be ballanced since they are flat tops, but ive never had a motor ballanced before. Also what is the general price range? Thanks
Lead Driver
Joined: May 2003
Posts: 9,303
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From: Lyndonville, Vermont
Depends how much heavy metal the crank needs $$$$
All the rotating weight is balanced to be the same. The crank and flex plate and damper are balanced together according to spec's. Sometimes there are race and street specs for crank balancing.. I used to get mine done for about 300.00.
All the rotating weight is balanced to be the same. The crank and flex plate and damper are balanced together according to spec's. Sometimes there are race and street specs for crank balancing.. I used to get mine done for about 300.00.
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
You weigh the old piston and rod if the new piston and rod are the same then you are ok.. each piston and rod should be the same.. if they are slightly off you could do some of the work yourself by taking metal out of the heavy ones to = the lightest one, basically the new piston should be within a gram or so of the old...Do some reading on it its interesting.. The whole mess is counter balanced by the crank webs they drill holes and add heavy metal. Each engine has its own balance characteristics..
http://www.centuryperformance.com/balancing.asp
Dick
http://www.centuryperformance.com/balancing.asp
Dick
Last edited by 99f350sd; Aug 23, 2005 at 09:17 PM.
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From: Murrieta, CA
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Hotshot
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From: iowa
most times hyperectic replacement pistons are pretty close to stock weight (but you can measure that to be sure) and there isn't enough difference to bother anything with an engine that never sees over 5000 rpm.
around here (and most places that I have seen for that matter) it's $150 to balance an engine plus the cost of whatever mallory they use but if you allow them to do the balancing externally usually the 150 will cover it.
Edit BTW mallory metal is very expensive right now because it's the same stuff they make armour plating out of so there seems to be a high demand for it right now.......go figure.
around here (and most places that I have seen for that matter) it's $150 to balance an engine plus the cost of whatever mallory they use but if you allow them to do the balancing externally usually the 150 will cover it.
Edit BTW mallory metal is very expensive right now because it's the same stuff they make armour plating out of so there seems to be a high demand for it right now.......go figure.
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so there is hope, i really doubt this motor will ever see 5000, Ill weigh them once i get them and see what comes up. This motor doesnt have to go 20 miles a day, It just has to make passes through the mud pit. Thanks for all the help
Senior User
Joined: Jan 2005
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From: Lynchburg Virginia.
If all you are changing is the pistons weigh the old and new ones. If the new ones are heavy'er by more than a gram I would have them balanced. It is fairly easy to do yourself depending on how much material you need to remove. Find the "lightest" new one and lighten it to within a gram of the old ones then bring the others to the same weight. The "Static" balance part is relativey easy, It's the dynamic part that requires the proper machine and most of all PAITENCE!
Tuned
Joined: Feb 2004
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From: Missouri
Originally Posted by monsterbaby
around here (and most places that I have seen for that matter) it's $150 to balance an engine plus the cost of whatever mallory they use but if you allow them to do the balancing externally usually the 150 will cover it
did not mean to just jump in there in there like that
Hotshot
Joined: Dec 2003
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From: iowa
Well the guy that does my balancing is in melcher, but I just send my stuff to him through napa here in chariton, since the guy that runs the napa machine shop is the son of the guy in melcher that does the balancing.
As far as who does balancing in ottumwa or centerville, just ask the machine shop you use, most likely they will know because most likely they have sent stuff to them to be balanced if they do any racing engine machining at all.
As far as who does balancing in ottumwa or centerville, just ask the machine shop you use, most likely they will know because most likely they have sent stuff to them to be balanced if they do any racing engine machining at all.