My buddy just bought a built H22. It's fully balanced and blueprinted, uprgraded valvetrain, 11:1 compression and a ported and polished head. My question is if this thing is going to run properly on a stock untuned ecu? I would think it would run too lean, but wanted to get some other opinions, and also how many miles should he put on it to break it in since everything is brand new. Thanks guys.

 

Take a look through here

https://honda-tech.com/zerothread/2168311