- Location
- Spring Lake, MI
Problem: Need a waterbox the size of a Jetmanic model, but with the decibel level of an oem round nose model. I did some peeking inside a jm box to see whats going on, and found pictures of a round nose box cut in half and made a hybrid. My box is dimensionally the same as a jm. The two chamber holes are 1-3/8" diameter. Small wedge taken out at the bottom to allow water to flow between chambers. The outlet pipe is about 3/8" above the box floor. That seems to be the key to the operation. I'm running a stock engine and exhaust and not expecting to have perfect on/off/on throttle response like I currently have. Luckily I only need a 20"x26" sheet of 1/8" aluminum and a $20 thick wall 2-3/8" tube off amazon. Will have to wait till spring to test. I'll also be doing a beach swap with my current jm box in my 5mm stroked 828cc engine and see how it acts. The model is a visual representation of the jm box.
