Bertram 31 Side Opening Air Boxes
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: $1,600.00 plus packing and shipping. (USA east coast shipments have averaged $125.00 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. Deposit required: $800.00 Shipping time: 4 to 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.
07/15/200 - Design Updates Some minor design changes have been made to the dorade boxes since the production of the last set, (shown above). These were done to both facilitate production and ease of installation. The design changes include new tooling to produce the box as a one part piece, with only the secondary baffel being fabricated into place, and the addition of external flanging on the ends and bottom. A registry flange is now included that both ficilitates installation and mkes better allowance for gapping control. For additional information, please contact: Capt Patrick McCraryNote on fitting to boats other than the 31 Bertram: The tooling for the Bertram 31 Dorade boxes has been designed to allow for construction of any length from 12" to 66". If you desire custom box lengths please call... Height and depth are fixed dimensions. |
