I was going to keep out of this because the OP seemed intent on using as much nitro as possible but I'll back up what the others have said about using minimal nitro. I've never used nitro and all engines (I've lost count how many ) run perfectly well and I find them dead easy to tune. Sure, you can gain a bit more power with nitro but you can also gain almost as much by raising the compression way above what they have as standard but that's not really necessary.