Wow, what a nice support. Yes, I don't know about all the mods, that is why I use a premade Modpack in the first place. You could have just explained it properly now without calling anyone stupid.I thought he was referring to the speed of the item output, since they are faster than just 1 redstone engine, so it was a mere misunderstanding.
Anyhow, thanks.
Indeed, i could, but i had a bad today, sorry for that.
More info : Premade modpacks are not good, as when you get stuck into something you don't know which mod is causing the problem and even less who to ask for help.
You should learn all mods you have, one by one. Mods are best used when you know them all, their respective owners and what they are related to (automation, magic, tech, decoration...) .
Your case is the example, as the problem is caused by BuildCraft and only by it, not even a bit by IndustrialCraft².