Test Day: Test day with Tanaka Racing at Lake Elsinore, CA

We had a successful test session over the weekend in beautiful California weather! Here we have some test data of some top speed runs of the day at Lake Elsinore, CA. Conditions were fair, slight wind and some small choppy waves the majority of the lake.

We went along with Tanaka Racing to get accurate GPS-based maximum speed readings for their stock-engine Kawasaki Ultra-260X. This older ski does not come equipped with a GPS speedometer like some newer watercraft, so we installed our DigSpice GPS receiver into a small waterproof bag and went for a few runs.

We've come out to test the ski running a custom water-air intercooler with TiAL blow-off valve setup by MKS Engineering, that replaced the leaky stock intercooler and blow-off valve setup.

Custom drop-in air-water heat-exchanger w/ stock mounting

TiAL BOV replaces the leaky OEM BOV/wastegate setup

Below we see several runs with the fastest recorded speeds highlighted. For this session we were testing only for acceleration and max speed, so the lap time is not our focus this time around. The color in the data name refers to the spring color used during that test run.

Use DigSpice to log accurate changes to time, speed, cornering, etc to optimize settings on your vehicle

In the second part of the test, we did some basic idle to 45mph sprints (5-45mph), recording the difference in acceleration between the different spring rates. Below we see a screenshot of one of the acceleration/top speed runs. Breaking down the data into sectors allows us to easily see the elapsed time from 5-45mph. Unfortunately choppy water conditions put a damper on acceleration and top speed, even though the ski was well capable of pulling 1G+ in flat sections.

Acceleration data: we can see here that the ski loses speed after every small wave... despite this, the ski managed 4-4.5 sec on average from 5-45mph in choppy conditions.

Below are some other screenshots of the runs on the lake, and the speeds at various points during those runs. There is no course for this data, as it was a free test session, however we will have some data for you in the next session when we data-log Tanaka Racing's heat next week at Lake Perris! We will show how DigSpice GPS Data-Logger can help you improve your times, even when the circuit has no walls and no physical "track" to speak of in world of PWC and boat racing.

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