Dart Honda B Series Blocks

Over the past two years, we've had the opportunity to build a number of Honda B series engines based on blocks manufactured by Dart Machinery. Each of these engines has worked flawlessly in it's respective application, prompting us to become a warehouse distributor for Dart.

We've found that the cylinders stay perfectly round during machining and more importantly during operation, providing a ring seal that's simply not available with most sleeved blocks. As most of you know, keeping the rings sealed (minimizing pressure losses) is paramount to power production.

The massive block casting also provides an extremely rigid housing for the crankshaft. Stock and sleeved Honda blocks provide good crank support at moderate power levels, however, they were never designed for operation in the extreme HP and RPM ranges enthusiasts are pushing today. As a result, the (excellent) Honda crankshafts tend to support the flexing block leading to higher frictional losses and accelerated bearing wear. The Dart block presents the optimal situation, where the block supports the crank, providing the best possible foundation for performance and durability.

Aside from the benefits we've touched on, these blocks are also available in standard and tall-deck versions which allow engine builders to assemble longer-stroke combinations while maintaining good overall geometry without trouble-prone deck-plates. We believe that when you compare the prices of using a Dart block vs. that of a sleeved block, the Dart certainly nets the greatest bang per buck. The peace of mind knowing that you'll never have to deal with the ever-changing warranties of most sleeved blocks is also more than worth the price of admission.....