the diameter of the pipes has a direct effect on exhaust gas velocity, and if the pipes are improperly sized, even by only a little bit, it will either restrict the flow enough to hurt high end power, or it will cause stagnance in the exhaust flow, killing the cylinder scavenging effect. and that will really hurt your low end, and can even hurt top end. so you really should stick to companies that spend money on designing and flow testing their headers. there are a few things you can get away with using cheaper parts, but headers and exhausts are not them.

 

exhaust flow is exhaust flow, pressure is pressure you'll still have the same coming out of the pistons when it makes its explosion it's just matters how thick is the headers cuz the more room it has to push out, the faster the air will release to the exhaust and thats when u have your Cat for a restriction so u wont lose back pressure

 

oh ok. good to know that you are so knowledgeable about flow rates, cylinder scavenging, and fluid dynamics. thanks for your insightful comments.


yes it was sarcasm. for the most part i am a very liked and likeable person here, but i am sick and tired of people talking about things that they dont know about like it is gospel. do a little looking around here for an article i posted about backpressure and flow rates and see if it makes sense. those flow rates and pipe diameters play a huge role in power production, especially in headers.

or, go buy your "DR267 Super Sport" (yeah, its a BS name) no-name header and come line up next to me and my DC sports ceramic coated 4-2-1 header. while youre at it, cut your springs and spray paint MUGEN across your hood. oh, and stickers. lots of stickers.






I hope you dont take too much offense to this, but i do hope that you decide you wont just believe everything you hear from friends and read on the internet. and no, im not saying you have to spend a fortune to go fast, but you wont get there buying the cheapest parts you can find. one good part is worth three or four cheap ones. and backpressure being "needed" is a bunch of crap.

and im a little cranky because im sunburned and tired, so maybe we'll have to talk about this tommorrow when i have more patience. sorry if i offended you. nothing personal.

 

I didnt know jack crap about bacl pressure and all of that until I read Sacicons article... It should be a sticky if it already isnt, ill go look for it.

 

never mind, its the only sticky in here! lol

 

Dude! That is not what a Cat is for. And if what you say is correct, then why buy a header at all? Why not stick with the stock exhaust manifold and just buy a good quality Cat? And while you're at it, make sure you buy crush-bent piping for your exhaust instead of mandrel-bent, and make sure they put a few hundred extra bends in the piping since "exhaust flow is exhaust flow".

[sm=nothatway.gif]

 

hey i'm not offended it's just when me and a friend of mine did the dyno and we have the same everything besides the headers. i have mugen 4-1 and he has DC 4-1, and it showed that that the DC headers had 2 extra hp which is not a big diff to even notice the power. So if u think it's worth to pay an extra 50-100$ for 1-3 hp then ur nuts. U probably could get that hp by making ur timing faster on ur distributor

 

I don't think I have ever seen someone challenge Sac's knowledge.

$100 for 2Hp? That sounds about right. What happens when you put an IM and TB on there? That 2Hp turns into 5 maybe 6Hp. Everything is designed to work in conjunction. Your exhaust flow is only as strong as it's weakest link. If your header isn't scooting your exhaust gases out of there as fast and efficiently as possible, what's the point of having a $500 cat-back?

Everybody is right when they say over and over that you get what you pay for. There are some parts that I am willing to cut corners on (see: 120 bucks for a Skunk2 shifter ****) but performance parts aren't on that list.

This makes all warm and fuzzy for spending an extra few bucks on DC. Your buddy and I will be waiting for you at the finish line.

 

i'm not trying to challenge anyones knowledge, it's just i kno what i'm capable of doing and fixing cuz i do all my seaches and installations myself. but i kno theres still alot that i dont kno but still tring to learn,experiment and understand why and how it works

 

cool, im glad youre here to learn. ive only had a few people on here that ive had a problem with. i hope youre not one. and how much was the Mugen header? and are you sure it was really Mugen?