Have you installed thermocouples for all 8 cylinders with your external plumbing, in order to verify that you have in fact lowered/equalized temps? Routing coolant from the very back of each head directly to the water crossover makes my think that may be tricking a temp gage.
Thermocouples should be installed in the heads for each cylinder centered on the exhaust side and monitored simultaneously. Some data would prove your system.
Last edited by Tiger Paw; 04-04-2014 at 10:07 AM.
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