Originally Posted by dboyett38666
I have a 400 bored to 4.185,and I was wondering which would be the best set of rings to use?I have built many engines,and all ran great,but I was told that it would be best to file fit all the piston rings,I've always took them out of the box,and put them on the pistons.Also what is the procedure for doing this,and tools required?I want to make the most power available for this engine,but if anyone has an idea on a low friction ring to use file or std. I would appreciate it alot.I will race the car and some weekend use.The compression will be about 11.1
If you've never used file fit , I would advise using the regular rings , If the overbore is pretty much exact the non file fit will work just as good and save you a hellava lot of time and headaches, not to mention the money!
I've used file fit on race motors and then freshened them later with non file fit and the car ran the same ET.