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In a message dated 9/19/2004 2:34:48 PM Central Daylight Time, ALVentures@cox.net writes:
<< Have you heard any feedback from Renesis racers (are there any?) indicating
higher coolant temps? >>
Speedsource in Florida is winning races. They field 5 cars all painted yellow. But they have to run stock everything, even so they have no problems, and finish every car every time.
The lower EGT is that extra heat being dumped into the coolant. It sounds like you are just a little passed having enough cooling capacity. although the temps are not outlandish. It is just costing you some power. You could dump in a bottle of WaterWeter from Redline. Add 5% antifreeze, Add a remote make up bottle with the water outlet on the bottom, and the 22 pound pressure cap on this bottle and nothing but an access cover anywhere else. The hose to this bottle should be from a high spot in the system where air is likely to get trapped. Better yet a swirl pot that Cosworth suggests be installed with every engine.
Start with the make up bottle about 1/3 full. Heat cycle the engine a few times, to be sure that there is no air in it. Any air will pop into the make up bottle, and any temp change in the system will pull only coolant from the bottle. After a few heat cycles the bottle will be empty that coolant will have replaced air trapped in the engine. I use a restrictor in the water outlet, but so many experts get hysterical over it I usually don't mention it. All of the coolant that leaves my engine through a 5/8" hole.
Increasing the water temp makes the radiator more efficient, so as long as the temps stabilize at some number, and do not run away, it just means you are a bit short on capacity. Raising the boiling temperature of the coolant as above may help eliminate the after shutdown boiling. The picture is of my system. I have yet to loose one to a cooling problem since 1980.
Lynn E. Hanover
CoolingSystemIII_WEB.jpg
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