Talked to a machine guy and he was telling me with forged pistons i need to get everything balanced.. What does that mean..He said something like u need new rods and crank and ect.

What i have is a b18b1 ls block with some nippon forged pistons and rings.

 

by balanced it means they all must have the same exact weight,as similar as possible with all of them.exactly right dmensions too.idk anything bout u needing new rods and a crank but you just might.

 

needing a new crank is bs unless you spun a bearing on your stock one. forged rods would be needed with forged pistons unless you want to convert the forged pistons to accept a press fit pin.

i dont think nippon makes forged pistons though..

 

heres the pistons

http://cgi.ebay.com/ebaymotors...d=1,1

 

yeah those look cast

 

whats that mean..lol

well i know what casting is but like whats that mean to me? as for balancing.

 

they're cast just like stock pistons. they are not forged.

 

so i should just get some stock ones and not have to worry about balancing?

or get the cast ones and have to get new rods? im so confused..lol


Modified by McGeeTM at 6:37 PM 1/22/2007

 

bump also wondering any methods on cleaning a head besides getting hot tanked, would engine degreaser and pressure washer work for cleaning inside and out?

 

Would you really leave the life of ur block in the hands of ebay?

On another note - DC2 is a crap ebay store, I wouldn't trust an ashtray from them.

 

so balancing is basically the weight ratio between the rods and pistons.. meaning the both nearly have to be same weight? what happends if they dont?

 

no no, lol.. i wouldn't listen to engine building advice on honda-tech dood, honestly 90% of these kids have never touched a tourqe wrench.

but here's my shot at it, first off you always need to balance you're engine build, stock rods/pistons, super jdm forged pistons, whatever, etc,
always balance a build no matter what.

now, why balance you're engine.
Balancing your engine helps:

* Save on Fuel
* Reduces Friction (heat)
* Increase Longevity
* Increase Horsepower
* More Consistency
* Smoother Operation
* Lower Chance of Fluid Leaks
* Lessens Component Failure


and what happens when you DON'T balance you're engine or get a half assed balancing job..

* Piston Rings ... fail to seal
* Bearings ... early and irregular wear on connecting rod and main bearings
* Damper ... the device that tries to assist in controlling harmonic shock gets overworked and begins to deteriorate.
* Oil Pumps ... Chatter and bounce, which can also create spark chatter and early ignition part failures (oil pumps driven off same drive as distributor)
* Timing Sets ... Early chain stretching as chain has to make up for damper failures
* Valve Springs ... Valve instability, spring harmonic failures (worse with gear drives)
* Transmission ... Front Pump failures in automatics, early pressure plate and clutch spring failures


further info,
http://www.centuryperformance.com/balancing.asp
http://www.babcox.com/editorial/ar/eb10330.htm

and /thread

Modified by GarageAlchemist at 5:08 AM 1/23/2007


Modified by GarageAlchemist at 5:31 AM 1/23/2007

 

thank you!

 

so the machine shop will do this for me as it states on the engine balancing page i think i read? just bring them the pistons and rods and rings and all the good stuff?

 

I dont know about balancing...
The crank should already be balanced, if its factory.
Most rods are balanced well from the manufacturer (even "cheap" eagle and scat rods are balanced when you buy them)

 

Alot of machine shops that deal with V8s will ask for everything (flywheel to crank pully) to balance the crank because thats whats needed for V motors. For inline motors if they balance the crank alone there good. Its always good to have it rebalanced but not ness. needed. If you go to a honda engine builder theyll ask mainly for the crank alone.

 

like these?

http://cgi.ebay.com/ebaymotors...d=1,1

they say they are already balanced but the pistons will need to be balanced. But not im not thinking about getting forged pistons after reading that they only really last for 10k miles?


blah engine building is harder then it looked

 

Engine building is one of those "you get what you pay for" in life. If you go cheap or half *** it wont live long. Forged pistons can last however long you and your tuner allow them to last. Theres some guys that run the same race motor for 3 years now (street class). What exactly do you want for this motor?

 

its going to only run 8psi
daily driven for school in such im running a little dsm turbo nothing fancy

 

Those ones you just listed are oem LS rods...they will be balanced from Honda.
Most pistons are balanced from the factory too (usually within 1 gram)...this includes oem and aftermarket.

You can balance the crap if you want, no one is going to stop you. Just dont be surprised if they only do <u>+</u>1 gram, over the entire assembly.
It will cost you close to $200, likely.

 

well how about this..


say i choose some good oem used pistons such as ls and use my ls rods with arp rod bolts and get some new rings and what not..

do i need to balance it then?

 

Its still the same scenario
If you personally want to weigh out the arp bolts, go ahead, Im sure they will all be very close to the same weight too. But even then, they are so close to the centerline, it probably wont even matter....
Rings dont factor in, neither do bearings.

 

k so balancing shouldnt matter with that then, thats only for some high performance engines?

so im good to go on using oem rods and pistons and not having to get balanced


sorry for all questions new to this dont wanna mess anything up

 

not even that...
My block has forged pistons and rods, stock crank - I didnt balance it.

Sure, you can be better off having it balanced...but I think its all that necessary since honda and good parts manufacturers did a lot of that work already.

Its an argueable topic...expect a few more people chiming in, saying that Im an idiot and all engines need to be balanced.
Youre using all oem parts...theyre as good as it gets, as far as cast parts go, you will be fine.

 

thanks man. appreciate all the help.


how many miles does ur engine have? becuz i was thinking forged but people say 10k is there limit or is it all about tunning.