@davidnunn posted:..Why are you using 160° fan switches? With a 180° thermostat, 185° or 190° would be more appropriate. It’s useless having your fans turn on before coolant is even circulating through the radiator or at highway speeds. Can your Sniper EFI system control the fans? If so, that might be better.
Did you confirm that your fans are blowing through the rad?
At 190° or 200° your system isn’t close to overheating but you have some issues you need to deal with before your cooling system is correct and reliable.
my "reason" for 160. - the fan switch is to regulate the temparture of coolant leaving the radiator. I expected a 20f drop across radiator with 180 leaving thermostat.
the Sniper would use the temparture sender at the thermostat. that location is not regulated by fan operations.
I can't get by with Your philosiphy and Commander Montgomery Scot's - "The more they overthink the plumbing, the easier it is to stop up the drain." In my former Life, I made my living by trouble shooting overly complicated controled systems, just trying to relive those glory days 
I am NOW begining to realize normal should be around 200 (at the block sender). corrected those other problems should let me get there