Last year I finished do a rebuild on my h22a4 engine and replaced the stock pistons with a set of nippon type s pistons. Its been running fine for a year now but I recently came across something online about have to tune the ecu due to the change in compression ratio from the type s pistons. Is this something I need to be concerned about or am I fine with my stock ecu?

 

You're fine. Just keep running premium fuel.

 

That's a relief to hear,I usually run 94 octane. Thanks for the reply