quote:Originally posted by SF:
It is a 408 clevor Fontana 11:1 soon 2000 km, efi solid flat cam .630 lift.
Running between 176 - 194F on high way(today it was 60F out door temp). Stock radiator electric puller fans no air in the cooling system Weiand water pump 160F thermostat. In stop and go traffic it reach 226F. When in idle it seems to not cooling, the temp still rising?!
Anders
First off, 226F in stop and go traffic is excellent. If you were at about 245f then start to get nervous.
Just pressure test the cooling system to verify that it holds 16psi. Check the caps also. You need a pressure tester kit for this.
Your cruising temperatures are actually too low. They should be at just over 212. The 160 thermostat for you is probably too low.
You might want to try the 182 and see it you have a higher cruising temp.
You really need to know what your oil temp is doing in all of this. That temperature MUST GET over 212F in order to boil out the water moisture in the oil.
A GOOD oil temp for normal operation would be something like 220F.
If your oil is too cool, it will cause premature wear on the engine. All the clearances for the bearings, etc, were calculated on the engine operating at the "normal" temperatures. Too cool is BAD. 220F oil is about normal. A little cool actually for that many cubic inches though.
It is possible that your car will not get water temps any higher than what you are showing now at cruising.
That is going to be a function of the cooling capacity of your system. It is telling me that it has a huge cooling system capacity.
I don't think you have an UNDER cooling issue at all. You may be OVER cooling because you expect the operating temps to be lower than you are showing.
That is overreaction to reality.