Okay,
Flycutting Pistons-this is a method of cutting valve reliefs in the tops of pistons, to allow for bigger valves and/or a higher lift cam. If you're doing a rebuild, you'll likely just get pistons that are already cut to work for your application.
Machining the Crank- If the crank journals have wear beyond the factory specs, you can have your crank machined. The journals are cut down as necessary (probably no more than .010-.020), and thicker bearings are used. If you look in catalogs, you'll probably see bearings that say -.010, or -.020. That's why.
Balancing-Crank is spun to check for balance, weight is added where necessary via weld or mallory metal, taken away where necessary as well. Rods are all weighed, and all are matched to the lightest one. The balance will also be checked between the weights of the big and small ends of the rods. Balancing is not super accurate in a stock engine, and not necessary for a stock rebuild. If you're looking to build a higher performance engine however, it might be something you should look into.
Hope all of that helps!
-Brian
66restomod's Home Page
Flycutting Pistons-this is a method of cutting valve reliefs in the tops of pistons, to allow for bigger valves and/or a higher lift cam. If you're doing a rebuild, you'll likely just get pistons that are already cut to work for your application.
Machining the Crank- If the crank journals have wear beyond the factory specs, you can have your crank machined. The journals are cut down as necessary (probably no more than .010-.020), and thicker bearings are used. If you look in catalogs, you'll probably see bearings that say -.010, or -.020. That's why.
Balancing-Crank is spun to check for balance, weight is added where necessary via weld or mallory metal, taken away where necessary as well. Rods are all weighed, and all are matched to the lightest one. The balance will also be checked between the weights of the big and small ends of the rods. Balancing is not super accurate in a stock engine, and not necessary for a stock rebuild. If you're looking to build a higher performance engine however, it might be something you should look into.
Hope all of that helps!
-Brian
66restomod's Home Page
