[Abysmal]

HighPlainsDrifter:

I do not know for a "fact" which direction the water is flowing.
But this evening I will open it up and take a look to confirm.
With a reverse rotation pump, should the flow be going from TOP to BOTTOM or from BOTTOM to TOP ??

OEM Fan shroud is in place, with a new fan and fan clutch.
Its moving a LOT of hot air.

The heater hose line is mechanical from the dashboard.
When the engine gets HOT, I run the heater wide open for extra cooling. What your saying sounds like that might be counter productive???

The detonation ONLY occurs when the engine is HOT.
Under all normal conditions the engine runs great with no problems. I just drove it to Las Vegas and back 300 miles with NO problems at all, but right now the ambient temp is down in the 70s where as in the summer its in the 110s.

The CHIP is my current target.

Looking for someone who can burn me a custom chip with some LIVE DYNO input....