ok i got a b18 and im building it and it had some good miles on it but the crank looks great no marks or anything. my ?? is do i have to get it balance or polished.

My build

b18a block
81mm honed still in spec
srp pistons 10:5:1 .074 head gasket makes it 9:5:1
eagle rods
acl baerings
crank????

b18 head non v-tec
5 angle valve job
dh-racing springs and retainer
stock cams for now

tuned on crome by me
1000cc injectors
walbro 255
e85

itr tranny 4.7 final drive

 

I would do both for sure

 

I doubt it will have to be balanced. You can balance the complete rotating assembly if you want to get crazy, however I have seen tons of motors last a very long time without doing so.

Concerning the valvetrain you are running, you may want to consider selling it & buying something with a better reputation.

Concerning crome, I would look into neptune or ectune

 

whats wrong with dh-racing there the only company that will stand behind there $hit for life supertech wont cuz steel and titanum dont got together ti will eat the steel spring and crome i have tuned alot of cars on it and i like it. but thanks for your help and im only going for 500whp

 

I would balance it because I believe my unbalanced assembly is what killed my oil pump.

 

not to thread jack, but what harmonic balancer where you running base-op.1320?

 

Its not a harmonic balancer its a harmonic damper because these are internaly balanced, it was a fluidampr thats why I'm leaning torward the crank not being rebalanced

 

ya but they come from the factory balanced and i would think the only time it would need to be rebalanced is if you have to get the crank turned

 

I would rebalance the assembly especially if you plan on running above normal redline, I have talked to alot of shops about my oil pump failure and they all say they balance there assemblies and told me to balance mine.

 

im only reving to maybe 8500rpm