Im an engine builder in my lil city. Until know i always did pistons ,pins ,rods and valve train balance by my self (except crank, and flywheel or other that rotating). i did it part by part (even for the wrist pin fastener) with 0.2 gram tolerance.

but untill now i still dont know how many gains we got from balancing rotating mass (in this word we ignore about the aim of minimizing vibration for purpose of comfortable feeling).

if there no big gains (under 1 hp). i would rather sit down and stay than balancing that stuff anymore. I hate to waste a lot of time and sufferance for under 1 hp jobs

(grand tourismo playsation says it gains more than 4 hp LOL) hahahaha

Regards


Odie Knownothings

 

Balancing the rotating mass isn't really meant to give you power. It's to lengthen the life of your engine and make it more reliable. If your running an engine with a lot of power or an engine turning high rpms, it will benefit being balanced even more. When you balance the pistons, rods, rings, pins, do you also have the crank, flywheel, clutch, crank pulley balanced?

 

Yup. Off course i balance 'em (crank ,flywheel ,clutch pressure plate, pulley ,etc) on the balance shops.

uhmmm... just to lenghten the engine life and realibility..

 

Hey guys i was just reading the post and had a quick question. I am a new engine builder and am fixing to do my first build up. I just went and had my crank balanced. Do i need to just wait and get all of my hardware ( pistons, rods, pressure plate, etc.) together and then take them and get it all balanced together or wil aftermarket part come pre balanced.

Thanks, David

 

You just bring them all to the balance shop ,and they will balance it all separately.
Piston , rod , etc will be balance part by part .
flywheel, crank ,pulley was whole balanced together.