Thread: ZXI Extended Nozzle
01-30-2009, 10:51 AM #1
ZXI Extended Nozzle
An extended turn-nozzle has some great benefits in many different areas of 1100ZXi operation. By extending the turn-nozzle, you effectively change the "throw" of the thrust as it exits the nozzle area, thereby using more thrust for propulsion, than wasting it out to the sides. Ever notice how WIDE the thrust pattern is as it exits the nozzle at WOT? (EDIT: please use caution looking behind you at wide open throttle!). By lengthening the nozzle, it "tightens" the throw of the thrust. This can increase top speed by about .5-.8 mph on the Stalker radar gun. Extending the nozzle also changes the deflection properties as you turn the handlebars. By lengthening the nozzle, there is more surface area for the thrust to deflect off of. This effectively tightens up the "slop" in the steering and provides better feel and added control. A longer turn-nozzle also has a "fulcrum" arm effect. This is due to the exit point of the thrust being moved further back. This also makes your trim system work even better, with more noticeable change (up or down) when operating the electric trim system as found on the zxi. You no longer need to put your trim all the way down to come out of the hole effectively and you no longer need to have your trim set all the way up in smooth water to get the best speeds out of the hull. An extended turn-nozzle will also add straight line stability in all water conditions, reduce porpoising and increase overall performance.
Here is a cheap way to make your own. These are some general lengths only because many people prefer different lengths.
You can use PVC to create a homemade version of Crones nozzle. Look at the pictures to see how it goes together using 4 inch and 3 inch PVC sections.
Some advanced options you can do are.
1. Use JB weld to smooth over the joint making it flow a little better.
2. Sand out the inside of the pipe so that it is the same diameter of the nozzle.
3. Use a countersink bit on the inside of the nozzle and install a countersunk bolt with a Phillips head and put the nut on the outside.
as far as purposing it did help a little bit with the trim all the way up seems to work best specially when going at WOT, it also affected how the VTS work the up position will really make it jump out of the hole now and the down makes the nose dive in more, which did not work that good before.
These are pics of some people have made. There is also a clamp on version that was made called a Jet Tail, these were longer and I have jet to test one or know of anyone who has tested it.
01-30-2009, 11:47 AM #2
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