what pistion to go with

[Grant Casey]

i am going to rebuild my 400ex and bore it out to a 416 and put a hotcam in. Wat compression ratio pition should i get a for it
JE 10.8:1 416 or a
Wisico 11.1:1 416

Cheers
Grant Casey

[acz440ex]

I have a 440 kit in mine but I went with a Wiseco 10.5:1 from Thumper Racing. They had Wiseco make this piston to their specs. They told me that Wiseco didn't want to do it at first because they thought it didn't have enough metal. It was too light. It wouldn't hold up. Well, they eventually gave in and after seeing the results Thumper Racing had, the Wiseco Pro-Lite came out. Now this is what Thumper told me. It's all I know about it. I can tell you I am very pleased with it. Mine revs quicker now. I replaced a JE with this one.

[Colby@C&DRacing]

Any 400ex we build here always gets a JE or Ross piston.. with the JE 10.8:1 and thinner gaskets you will be in the 11:1 range.