Need a quick answer

[GT40FIED]

Originally posted by AzCivic
nononoNO! wtf dont you understand, I NEVER EVER said a big ass exhaust is best, omfg i cant believe your throwing out shit and saying thats what i said. I SAID VELOCITY IS IMPORTANT, YOU DONT GET GET VELOCITY WITH AN EXHAUST THAT TOO DAMN BIG, holy shit did you skip over everything i wrote.

VELOCITY, VELOCITY, MOTHER F'ING VELOCITY.

you said a little is good, too much is bad. I said NO, velocity is key to making power.

Look...I'm not argueing that velocity is a bad thing. But you have to take other factors into consideration. Things like volume and pressure waves. Say you have a given exhaust that has a super high velocity. At a lower rpm this could be beneficial under the right conditions. The problem is at higher rpms it will become problematic as the pressure waves will begin to basically run into each other causing them to back up. So you can't design a header around low rpm velocity. But then again you can't design it around high rpm power unless it's a race header. This is especially important with small displacement engines like Honda's since they can't really benefit from an H or X pipe that can even out these waves in a true dual exhaust system. So what do you you do? You design a header whose purpose is to give decent flow and velocity down low without over doing things but has the capacity to flow more at higher rpms. It's all trial and error I suppose but the velocity on the low end can't just run rampant or else you won't have the benefits that come with higher rpm power. I'm also a bit curious...a few posts back you said that even though your 4-2-1 header didn't make the power you desired, other designs did. My curiosity stems from wondering why you'd stick with an inferior design if other products work better. Hell...I've swapped heads on my car 3 times because the pieces I bought didn't suit my purpose well enough...so why should I stick with them? I'm talking practicality here...not balls to the wall power. We're talking about a street car that can't benefit from the logic of race cars that can throw caution to the wind.