But how much? How do I check it? How do I know when I'm done? Is this an engine shop thing?
Cley
Cley
Snowmobile..?.....No, I'm tits deep in snowmobiles to repair. I want to start working on this engine this spring. This winter I'll be doing a 2500 rpm convertor and a 4.10 geared 8 3/4. When I started this thread, I thought my motor in my car had been badly hurt, but it turns out not to be.
Cley
But how much? How do I check it? How do I know when I'm done? Is this an engine shop thing?
Cley
I'm all set up for external balance in my car so it will stay that way I think. I guess I'll see how much the balance will cost .
Cley
View attachment 1715414024
Yes definitely a machine shop thing. Here's mine being done. It's not too expensive unless they have to start adding Mallory which is a heavy metal that's kind of expensive...
Simplified version....... There are 2 steps for a V8 or V6:What is involved in balancing a motor for lighter pistons? It's just my fear of the unknown here. The KB pistons are actually cheaper than the FMs on Summit right now.
Cley
What is involved in balancing a motor for lighter pistons? It's just my fear of the unknown here. The KB pistons are actually cheaper than the FMs on Summit right now.
Cley
There is one really good shop here in my area. Its run by older guys and they seem to know what they are doing. A few guys at the track recommend them to do Mopar stuff. I'll post the cost when I get it.
Cley.
LOL... well, all reports are that the factory balance range was not all that great... reportedly a range of + or - 25 to 30 grams. And the KB weight change in the 360 is a lot less of a change than for the 340 or 318; the stock 360 pistons were quite a bit lighter already than the others. Stock 360 bobweight is right around 2150 grams.... with the KB flat tops and stock rods, it changes to around 2078 grams.I used the KB107'S in my 360 and did not have any balance done! Many here will cringe but It was 14 years ago I was younger and very naive. Even thought when I got the KB's that they were just replacements. Engine is still running strong and always seemed smooth. Did get ring gap right LOL. I guess I got lucky.
The weight difference is not going to be all that big, but the compression change WILL be a big change. Those old stock pistons are sooo far down in the hole LOLBut the weight makes a big difference on how hisengine will respond and the compression height difference makes a big difference
DBL check your deck clearances and dome/ dish/ valve relief volumes and check proposed compression with a couple of gasket choices
LOL... well, all reports are that the factory balance range was not all that great... reportedly a range of + or - 25 to 30 grams. And the KB weight change in the 360 is a lot less of a change than for the 340 or 318; the stock 360 pistons were quite a bit lighter already than the others. Stock 360 bobweight is right around 2150 grams.... with the KB flat tops and stock rods, it changes to around 2078 grams.
The weight difference is not going to be all that big, but the compression change WILL be a big change. Those old stock pistons are sooo far down in the hole LOL
I would think there's some cost in the overhead of buying the machine to do it...Question....I'm thinking that the main cost in balancing is the labor in weighing everything and the computations as opposed to the actual machining?
Question....I'm thinking that the main cost in balancing is the labor in weighing everything and the computations as opposed to the actual machining?
Question....I'm thinking that the main cost in balancing is the labor in weighing everything and the computations as opposed to the actual machining?