eric1967

I have a LS1 in a 67 Camaro. It has a 187 degree thermostat in it. It will idle at 185 to 190. Right were it should be. When I drive it the temp drops to about 150 or cooler if it is cooler out. I think the water pump is pulling water past the thermostat. I have replaced the thermostat many times. The fans never come on during this time. I am considering trying to restrict the upper hose some to keep water in the engine longer. Has anyone else had this problem? Thanks Eric

fast400

iTrader: (1)

Mine runs pretty cool. I have a dual pass radiator. What radiator do you have? Try blocking half of the radiator with cardboard to see how high the temp will go.

Jimbo1367

Fast400,
What trany are you running? I have been thinking about dual pass redi from JEGS. I am running a auto and not sure if a trany cooler WITHOUT a fan would "cut it". Any thoughts?
thanks
Jim

fast400

iTrader: (1)

I'm running an external cooler. The radiator has 2 fans and trans cooler also.