rearenginekarts.com

Righto fellas whats the measurements of these rear boost ports width and height plus most important depth and is there a certain angle for the top of the boost port.

Mc Bob.

Hi Mc Bob, This is the port layout of a Big "J" 820 from 1964. The boost "8" ports are done with a 1/2" ball end mill on a Bridgeport with head at 20° off vertical. Roger