I know for sure that i am balancing my crank but if i get it micropolished then what does that mean what does it do i will also be getting it knifed edged what can i expect to pay and what exatcly does microposlishing do.
micropolishing leaves a chrome like finish on your crank journals for minimal resistance to the bearings, = better efficiency.
I suggest you balance your whole rotating assembly and not just the crank.
when you have any rotating assembly balanced, im pretty sure anything that has to do with the crank will need to be on it for correct balancing. if anything get a lightened flywheel, and anything fancy such as knife edging is a waste unless your going full out racing. 
Originally posted by RSBAD454
when you have any rotating assembly balanced, im pretty sure anything that has to do with the crank will need to be on it for correct balancing. if anything get a lightened flywheel, and anything fancy such as knife edging is a waste unless your going full out racing.
no. when they balance the bottom end they do all the parts separately. Its more cost effective than actually bolting it all together and studying it while it moves.
they balance the crank by itself. then they balance the rods to eachother. They do this by making sure they all weigh the same. Same goes for the pistons. Flywheel should also be balanced
knife edging is not something normally done to honda motors. One of the big reasons why people used to knife edge cranks is because in older motors the crank actually dipped into the oil sump and hit the oil (our cranks don’t hit the oil). The big counterweights on the crank hitting the oil actually caused some resistance. By knife edging the crank it slides through the oil w/ less resistance. The actual lightening of it is beneficial as well.
well the place said that micropolishing is only 35 bucks and balancing i would have to bring in the crank and pistons and rods well the thing is i have eagle rods so do i reley have to get them balanced.
Originally posted by Gibson
well the place said that micropolishing is only 35 bucks and balancing i would have to bring in the crank and pistons and rods well the thing is i have eagle rods so do i reley have to get them balanced.
the rods may come balanced… with a product like that i would expect them to be. But you might as well bring them in anyway. it can’t hurt.
that is what i was expecting.
I had my crank balanced and polished at PAC motorsports in Denver and It cost me $180 I also had the oil holes chamfered too and it was an extra $80. You might want to double check the weights on your eagle rods. Mine were very close in weight but varied about 2 grams or so between them the weights I got are 530,531.5,531.5,532 grams. I also have JE pistons and the weights were dead on the same with rings wrist pins ect… HTH
Originally posted by 91IntegGS
[B]no. when they balance the bottom end they do all the parts separately. Its more cost effective than actually bolting it all together and studying it while it moves.
they balance the crank by itself. then they balance the rods to eachother. They do this by making sure they all weigh the same. Same goes for the pistons. Flywheel should also be balanced
knife edging is not something normally done to honda motors. One of the big reasons why people used to knife edge cranks is because in older motors the crank actually dipped into the oil sump and hit the oil (our cranks don’t hit the oil). The big counterweights on the crank hitting the oil actually caused some resistance. By knife edging the crank it slides through the oil w/ less resistance. The actual lightening of it is beneficial as well. [/B]
wrong dude, they weigh the rods and grind the big ends of the heavier rods so they weigh the same amount as the lightest rod. they weigh the pistons as well. they put these simulated weights on the crank along with the flywheel and pulley in some cases and spin the assembly to figure where weight needs to be added or removed from the crank. i had my 427 balanced with everything attached except the balancer cause it balanced itself on initial fire up. i dont know where you have been getting your stuff balanced cause anything that spins on the crank must be on it to balance correctly.
Originally posted by RSBAD454
wrong dude, they weigh the rods and grind the big ends of the heavier rods so they weigh the same amount as the lightest rod. they weigh the pistons as well. they put these simulated weights on the crank along with the flywheel and pulley in some cases and spin the assembly to figure where weight needs to be added or removed from the crank. i had my 427 balanced with everything attached except the balancer cause it balanced itself on initial fire up. i dont know where you have been getting your stuff balanced cause anything that spins on the crank must be on it to balance correctly.
thats how i said they balance the rods —they make them all weigh the same, same thing you said.
so they actually bolt everything together and put it back in the block and spin it to balance it? are you sure? got anywhere i can do some reading up on what you’re saying, cause i’ve heard numerous times that they balance everything separate.
Originally posted by 91IntegGS
[B]thats how i said they balance the rods —they make them all weigh the same, same thing you said.
so they actually bolt everything together and put it back in the block and spin it to balance it? are you sure? got anywhere i can do some reading up on what you’re saying, cause i’ve heard numerous times that they balance everything separate. [/B]
yeah dude thats how they balance all crnaks unless they found some new special way to do it? you have to balance the flywheel with the crank otherwise you would be able to put any other flywheel on it from any other motor, and we all know that this isnt a perfect world and so the need for balancing is a must or else your motors bearings will take a beating. yes they weigh all the rods and pistons and clamp the simulated weight to the appropriate crank throws and check to see where the crank is out of balance at. i have watched my friends many times at the machine shop do this.
oh i didnt see where you asked if they put it in the block…and thats a Big NO they dont. they put it on a machine that rotates the crank.
Originally posted by RSBAD454
oh i didnt see where you asked if they put it in the block…and thats a Big NO they dont. they put it on a machine that rotates the crank.
how can they put the rods and pistons on the crank if its not in the block? they’ll just flop around. I’m beginning to think that we are sorta misunderstanding eachother a little.
--------wait, i just read that you said “simulated weights” ok. i don’t know anything about that… sounds reasonable though. i thought you meant they put the whole assembly together. I know they have to spin the crank to balance it… thats sort of a given—but having the rest of the internals on it just seemed quite far fetched… we’re on the same page now 
and no, you don’t have to have your flywheel and crank balanced together. I had my b17 bottom end balanced at bensons, he doesn’t lighten flywheels so i took my flywheel to a local shop and had it lightened/balanced/resurfaced.
same goes for the crank pulley. The crank pulley does not need to be on the crank when the crank is being balanced. the crank pulley on honda motors is actually a “harmonic balancer” as well as a pulley. There is rubber (or some material) inbetween some of the metal, it dampens vibrations. Thats why aftermarket crank pulleys are not recommended…they don’t have the “harmonic balancer” effect like the stock ones do.
They do balance the rotating assembly with flywheel
As a matter of fact the machine shop that I took my block to insisted taking the pressure plate and the flywheel together to fully balance the entire rotating assembly…
-Jeff C.
yes they do, cause there is no such thing as a perfect circle, a lightened flywheel or not. same concept for wheels, you have to have those all balanced. my big block chevy motor had to have the flexplate on it to balance. i understand about harmonic balancers or torsional dampners, they too much be on the assembly. the rubber material is some type of elastomer which seperates the outer and inner portion of the balancer. like i said the ATI balancer i bought for my domestic didnt need to be on the crank during balancing cause it is a special type that balances it self on intial startup. when i build my B16 im having everything balanced as one unit, your bearings will thank you for it.