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Siskiyou Summit Overheating

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12 of 15
The Grapevine on I-5 outside of Bakersfield climbs 2,500 feet in less than 12 miles. The deuce gained speed (from a dead stop at the bottom) the whole way up and then held 55 mph. However, the water temperature slowly rose to just over 200 degrees. A pyrometer would have been a nice feature to keep track of the exhaust temperature.