When I bought my 331 kit the guy at Coast High Performance told me the rotating assembly was balanced. I'm just wondering, how did they manage that without knowing which flywheel I was going with and which harmonic balancer I was going to use. Should I have the whole set together balanced again?
Probably balanced it for a late model(50oz) if it has a one piece rear main seal. But i might give them a call and see. Thats something that you definetly want to know.
That's what the guy said when I stopped by and asked him. His explanation was the parts were "externally" balanced so I didn't need to have everything rebalanced after purchasing the balancer and flywheel.
I wouldn't rebalance id just get good parts for it and assemble. So many people use that same setup its pretty common now so they just balanced like that.
thanks, from what I understand of the whole balancing thing (very little) it didn't make sense for someone to say that the whole rotating assembly has been balanced and yet they didn't have the "whole" rotating assembly. I understand what you are saying, it's probably close enough but if I'm putting all this money into an engine I'd like it to last as long as possible and if that extra $300 gets me another extra couple thousand miles, great.
when we were puting togther the pistons and rods, only one rod had grinding on it. that shows that they did do something. i was expecting that more than one rod would have grinding to match the weights. also i didnt see any thing done with the pistons to match there wieghts.
Check with CHP an see what they used for balancer an flexplate, also how close to the gram it was balanced. Flexplates an balancers are not excactly the same weights when you are talking grams. If you want it check by a local, ask around for someone who is good! Lots of guys say they balance but use a postage scale or half cheek stuff, If you decide to have it check, explain to CHP an ask them if your assembly is off will they refund your balance money. Good Luck
you know I've tried communicating with the people at CHP and have had very little luck. They seem to just kinda talk past you. The guys in the front have no communication with the suppliers of the products and have no communication with the machinists in the back. And their headquarters is very close to me so I either call or just stop by. I'm gonna have everything checked by Bryant's machinist and have it rebalanced. I don't have much faith in CHP at this time. If there is any issues I'll be sure to let them know and get my money back for sure!
when i had my 306 balanced the guy gave me a printout of all the specs. it had balancer and flexplate with it... ......
The majority of 5.0 based strokers are balanced to 28 oz/in. To balance yours, they used a flexplate/balancer that's kept just for this purpose. Just buy the correct imbalance flex/flywheel-balancer set it's balanced for. No balancing job is exact to all rpms. Someone who's very good at doing engine balancing will tell you the same. They balance it to a " rpm range" target.
I'm getting mixed information so I went ahead and dropped it off at a machine shop that's reputable to get it done. Bryant and I had already mounted the piston on the rods so $85 for him to take those spirolocs out and put them back on, $225 to do the actual balancing and $30 to grind off the sharp edges and clean everything up.
My balance guy takes rings, bearings, bolts and anything else that goes on the crank and balance it all!
