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Old 01-20-2021, 06:08 PM   #16
cmitchell17

 
Drives: 17 2SS, 8L90, Cam, Heads, E85
Join Date: Dec 2016
Location: US
Posts: 1,213
I will say since I've fixed my thermostat, I now notice a lot more knock retard being pulled at WOT. I run E85 (more like E74) 100% of the time so I was surprised.

If you let the coolant get too hot, it will knock enough for you to audibly hear it. My stock oil cooler hose busted and my coolant and oil temps got above 240 and I was trying to limp it home and even then it was knocking like crazy, I should've had it towed.
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