[Keithc8]

Well I feel that there are several things that have helped the cooling of the new engines. The blocks have the thicker cylinders which will disapate the heat from the combustion and friction of the piston and rings better. The thinner cylinder blocks put more of the heat into the water. The aluminum heads used on most of these engines also gets rid of the heat better than cast iron and this is why most aluminum block engines will run a little cooler than there cast iron counter part. The water jackets in the new blocks have had some of the restrictions taken out of them that the original blocks had. This lets the water circulate better and more evenly through the block as well for better cooling. Then you have better water pumps available from Edelbrock that helps as well along with some better radiators. Put all of this together and you have a much more effective cooling system than before.
The machining has come a ways as well with the CNC machines that we use, honing with torque plates for better ring seal, better machined blocks, smaller bearing journals for less bearing speed on the rods, lower tension rings because we can seal them better with the honing process and the plasma moly material, better camshaft designs and a lot more choices along with a lot of dyno testing and racing to figurte out what works have all help create a better engine. Good luck.

Thanks, Keith