Originally Posted by Mopar358
Have seen extensive marketing of Procomp parts and some seem cheap but with good results from Scat and Eagle is the saving there or they as poor in quality control as many forums suggest?
China is just getting started. Their engineering and quality control are at about the same place that the Japanese were in the late 40's, early 50's, barely turning out junk that people will still buy because of the low cost of it. I have heard tales of the factory workers sweeping up aluminum shavings off the floor and adding them to the molten mix in the ingot. So, when you have "X" amount of dirt and foreign material in the alloy, you can expect voids, bubbles, etc. in the finished molded part. Also, the accompanying parts like valves, springs and such are not the best you could buy. Most fellows who use those heads will buy the bare casting and install the valves, etc of their choice. But they will improve, just like the Japanese did. When you think Japanese product today, you envision a quality piece. I wasn't always that way.
I have no personal experience with Eagle, but the machine shop fellows on this board have stated that the quality control is less than acceptable. They have told us how they will have to machine the cranks before they can be used in a motor. Word on the street for Scat seems to be pretty good. David Vizard has stated that he has used a Scat cast steel crank in a 383 at the 550 hp level for a couple of years with no failures.
Bottom line, same as always, you get what you pay for.