And then someone came up with the idea to underbalance, and that helped even more. I would venture to say that most of the cars on the starting line for the next open-motor race will be underbalanced-some by as much as 45 percent. -Peter Lieb, Scat Crankshafts

Expert Advice
With the V-8 motors, we never recommend a cast crankshaft, but that is something we've found you can get by with on the four-cylinder motors. From what I understand, they have a little more flex in them, so they seem to be able to take a pounding. They may not have the life cycle of a forged crank, but they are still pretty good.

The ARCA Truck motor we did is a pretty good example. We offset-ground it down to a Honda journal and increased the stroke by 0.04 inch. Now, this is a dry sump motor, and we really wind them up. We won that series two years running using a cast crank, and we've never had a failure issue with it.

We are also in the midst of testing to see just how much we can stroke a Ford 2.3 engine. We've got a highly modified crank out of another engine that we're trying. It's a factory steel crank, and we are looking to get somewhere in the range of 3.67 inches of stroke. That should result in about 2,800 cc from the 2.3-liter block. That much stroke will really help with the torque, which is what you are always trying to find in four-cylinder race motors.-Bob Koch, Race Engineering

King's Crankshafts Scat Crankshafts
Race Engineering