posted September 09, 2005 12:44 PM
Jetting plays a part in how hot your engine will run, but I'd start looking elsewhere for over heating problems. You didn't say HOW much you are over heating. Maybe you really are not. Are you over 220 - 230 degrees while running (full out) during the race? How's the weather in your location? Humid, really hot temps, ect. I know my car will get up to 230 when parading during a caution, but generally the engine does not get over 205 during a blistering pace full throttle race lap after lap.
Run a solid steel fan, (I run a 5 blade, but some prefer a 4 or 6 blade)
Make sure all incoming air is concentrated into the radiator and then pulled by the fan into the engine, no leaking or sucking around the shroud.
Check your pulley ratio.
If your using a thermostat or restrictor plate (washer) make sure it is the right size and working. I run a 7/8" restrictor.
Recently I was running about 15 degrees hotter than normal, and after pulling the heads we found the head gasket was blown between two cylinders. Water was going into an one cylinder and burning out the exhaust with no signs on plug, outside of head, ect. We were just loosing water.
Sorry about running on here, just trying to add a little insight to other areas to look at.
Good luck, and Race on.
(Wish I was at Boone right now. I miss it!!!)
if it ain't fun, then don't run