Bertram 31 Side Opening Air Boxes02/07/05 - Design Updates To gain more engine room space, the original style dorade box has been discontinued and a smaller, but equally efficient, dorade box has been designed.
These ready to install Dorade Air Boxes, for side induction air are specifically designed for the Bertram 31. Principal features include: Optimum air volumePrice per pair: $1,700.00 plus packing and shipping. (USA east coast shipments have averaged $125.00 using UPS ground.)Up to 400 hp diesel. Diesel engines need far more air than do gas engines. The rule of thumb for diesel engines is 1/2 square inch of free air delivery per each rated horse power at full RPM. (Boxes are also available in any length from 12" to 66".)Noise reductionAir delivered from hull sides, below the shear line.Cleaner airEven in a head sea with smoky diesel engines, the inducted air is always fresh. No ingestion of engine exhaust, as is possible with cockpit air supplies.Visual appealForm follows function. The three hole configuration is both a "signature" design, and a complement to the lines of the Bertram 31. Minimum deposit required: $825.00 Shipping time: 4 - 6 weeks.  Kit will contain the following:
Construction of the Air Box is 100% polyester resin and fiberglass. Installation should be done using epoxy resin and Cab-O-Sil. Addition of fiberglass mat or cloth as tabbing is not necessary. The Air Box and hole template have been designed to give optimum free air delivery for any engine up to 300 hp. Acceptable air delivery for engines up to 400 hp. Air delivery is calculated for diesel application, so any size gas engine is more than covered.
 
 
For additional information, please contact: Capt Patrick McCrary |
