My balance specs ?
But .5 where? rods, pistons, pins, crank? I will say that if you'r a .5 gram here and there the this accounts for 1.0 grams somewhere or more? Right? Even if the Brgs. are off or the rings, somewhere the balance is off. Yes I do agree that the engine won't see the viberation but it's still there and cost HP due to harmonics.(things fighting them selves) Now does this effect the engine in a bracket car, probably not or even a street engine I would have to say NO but regarudless what anyone says the better you balance a engine the better it will run and smoother. The factory allows 3-5 grams for a stock balance and have heard that some balance up to 5-10 grams but I WOULDN'T go there! This is why I have bought the balancing equipment to get the job done right, now I'm not saying that it can't be done else where and he's right not many shops give the balance sheet or card out, so you'r at the mercy of the shop. But still the better the balance the better the engine with everything else considered. Most people don't consider the weight of oil as balancing as the weights are so much different, think of it as weight is not 20-50 heavier than 5-30? By viscositiy yes and also by weight, it might only be a gram but multiply this by 8 rods and 5 crank journals, it's still the same a gram is still a gram. Just something to think about?
BJR Racing