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Tim,
Right now you are 13 % overdriven.Tom's stock pulleys are 17 % overdriven.
Your serpentine system is for a standard rotation pump.
As I said before,I have been fighting the same battle after getting my KC.Been dealing with it for a year now.
I'll tell you the steps I went thru and ended up lowering it 20*. Maybe something in it will help you.
This is all in city traffic,stop & go.Tempts in low-mid 80's
1. 200-205* 180* thermostat
2. Installed new Moto-Rad 180* thermostat , no difference
3. Replaced WP pulley. From 12% underdriven to 5 % overdriven. Lowered 5* to 195-200*
4. Gutted old thermostat. 1 1/8" opening.LOWERED tempt 15*. Now 180-185*
5. Removed gutted thermostat and install 1" restricter plate. Raised 5* to 185-190*.
6. Put bleed hole in gutted thermo and reinstalled.
Now 180-190* with tempt in mid-80's.
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