Glenn, we are going to start the build on Eric's 331 soon. However, I want to get your opinion on piston to wall clearance. He's using Probe SRS forged pistons and they recommend a clearance of .0030 - .0070 for a 4.000-4.199 bore. Eric had the machine shop hone it for a .0030 clearance.
Now, he is going to be running a blower without an intercooler. Do you think that we should have more clearance due to the extra heat from the blower or will the high inlet temp not affect the temp and there for the expansion of the piston? I know he plans on building the car so that he can run track days with it so it will see extended higher RPM runs which will create higher cylinder temps.
What are your thoughts? Do you think .0030 will be fine?
When I built the 302 in the Cobra I didn't even check the clearance when I installed the pistons and it didn't have any noticable wear when I replaced the head gaskets a while ago.