bottom end · FF-0483

Are three main bearings what makes a Flathead fail?

Steve does not think so. He continues to say the three main bearings are not usually what fails; very precise balancing is the key to making a Flathead stay together, and that is what he worries about. This engine went all the way to 6,000 RPM with a blower and did just fine.

Expert

Steve Coppock

Evidence

expert attributed

Component

main bearings and balancing

Applicable scope

Steve Coppock's supercharged ARDUN overhead valve Flathead, 8BA block, about 289 cubic inches, with a Weiand 177 on the engine dyno at Klein Engines