I run a 160 deg thermostat with a 1/8" hole drilled in the flat part which takes care of any trapped air in the system along with crossover by pass working. Never had a problem.
New engine is getting the same thing. Have extra piston to wall clearance because of a filled block and I want it to get up to temp as soon as possible.
Trying out KREs new crossover made to go with their High Ports.
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