amine end rich polyamides including nylon 6 poly iminocarbonylpentamethylene that has been chemically modified to increase the availability of free amine ends either by end capping of acid ends or by the addition of dyeable amine ends or both by such means as are known to one skilled in the art and nylon 66 polymers modified with caprolactam and or other compatible but u201c irregular u201d monomers which are known in the art the openings in the spinneret 10 can take any convenient or desired shape thereby to impart any predetermined cross section configuration to the filaments f the filaments f are air quenched in a chimney 14 wherein cooling air at a predetermined temperature is blown at a predetermined flow rate past the filaments f the filaments f forming a yarn bundle are pulled from the spinneret and through the quench zone by one or more feed roll s 16 rotating at a predetermined rotational speed at the bottom of the chimney the filaments pass through a finish position 18 where the filaments f are coated with a primary finish to facilitate drawing and texturing the finish may be applied using any of the devices commonly known in the art as finish applicators such as finish rolls or finish applicator tips the filaments f next pass around the feed roll 16 and are drawn over a pair of heated draw pins 20 by a pair of heated draw rolls 22 an insulated enclosure 22 e reduces the loss of heat energy from the draw rolls 22 as is known in the art additional draw rolls may be provided if a multi step draw is desired after draw the filaments f are textured and form a coherent rapid dyeing open structure bulked continuous filament bcf polyamide yarn texturing may be.