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Dyno Cooling Rule

Printed From: SAE Clean Snowmobile Challenge Forums
Category: General
Forum Name: Competition
Forum Description: If it happens in Houghton, it happens in here
Printed Date: Jul/09/2020 at 5:57pm
Software Version: Web Wiz Forums 11.03 -

Topic: Dyno Cooling Rule
Posted By: dsavageidaho
Subject: Dyno Cooling Rule
Date Posted: Mar/21/2016 at 3:01pm
To whom it may concern,

We want to preface this by saying Idaho's failures were not a result of the cooling system at competition. These conditions did not help, but being ill prepared for the conditions were the cause. 

This competition was hot. In the past the cooling system has been able to adequately cool our snowmobile. While the high (>60C) head temperatures work well for four-stroke engines two-strokes require cooler head temperatures to operate well. The ideal head temperature is around 46C, but they can operate adequately at temperatures up to 60C. We do not propose a rule change, but a hardware change. 

At our university we use a Superflow CT700 tube and shell cooling tower that can hold our engine at WOT within a few degrees for an extended amount of time. It does not require any additional hardware other than what is already available at competition and does not use chilled water. It utilizes two separate water loops to achieve cooling. One runs through the engine and the other through an external radiator much like what is used at competition. We do not know the cost of the system, but I do know it is effective. The system is mobile and has a thermostat of sorts which would allow it to be somewhat adjustable for the different engines. 

We are looking for feedback from judges and competitors on what they think of exploring this switch. 

Thanks for your time and consideration,

University of Idaho Clean Snowmobile Team

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