WORKING Header Knowledge

[VizualXTC]

**I dunno if this is a V6 Tech topic or a FI topic, please move if needed**<p>Ok, here's our chance to put our paper knowledge of an engine and turbo application to work. I am planning on building some higher flow headers for when I turbocharge my MX-3 with a KL03 engine. Now, I know that a lot of you know about the exhaust pulses and proper manifold lengths. Let's build a turbo manifold. I am going to be using 16 ga mandrel bent stainless steel. I prefer an els design also. If we can get some drawings of some headers or some explicitly detailed explanations, that would be great. I'm sure some of you have been toying with this also, so I'm sure I'll get some pretty good replies. I am still working on it also and I will post my designs as soon as I finish some. Thanks for your help everyone.

[VizualXTC]

Nobody wants to help out? I figured peeps would be excited to do it

[Bri94GS]

I can probably get you some pictures of a exhaust manifold from my Eclipse...not sure if that would help at all though.

[marshmallow15]

so you're looking for different drawings of different style turbo mani's? or headers?

[mx3man83]

I was just thinking of making some headers..well not making them, but helping make...I have some pretty good welding skills...Only problem is, i have no idea what headers do. I realize they are meant to give better flow, but how?? I always read "four into one", and i know that means bringing all four exhaust "pipes" into one, but why is that more efficient than a stock set up?? I know i could search around the web to find out, but i figure I would get a discussion going.

[marshmallow15]

hey ryan, what about a turbo manifold that looked like the mugen twin loop header? i know someone on clubsi.com turned his mugen twin loop header into a turbo manifold and it just looks awesome. ill try to get a drawing out.

[VizualXTC]

Ok, I must not have really explained myself well. What I meant was I want to build "KL series specific" turbo headers. I know that I could build some generic 3-1 headers, but they wouldn't be optimized for the KL series engines pulse length, frequency, and series. I just want to see what we as a collective group could put together. I mean I am going to build something whether or not we find the "perfect" header, but I just want to see what we can come up with. I thought this would be a fun little "science project" for some of us that want to challenge ourselves. I still have to get more information on our engine before I can start my calculations. This is basically a "bench mechanic" type of thing. <p>BTW, Nice to see you again Bri, been a long time since I seen you post. Where ya been bro?<p>[ April 29, 2003: Message edited by: VizualXTC ]</p>

[VizualXTC]

<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr>Originally posted by mx3man83:
I was just thinking of making some headers..well not making them, but helping make...I have some pretty good welding skills...Only problem is, i have no idea what headers do. I realize they are meant to give better flow, but how?? I always read "four into one", and i know that means bringing all four exhaust "pipes" into one, but why is that more efficient than a stock set up?? I know i could search around the web to find out, but i figure I would get a discussion going.<hr></blockquote><p>Basically a stock manifold is refered to as a "Log" style header. It looks like an E on it's side. So you have 2 90 degree angles on each header. A 3 into 1 has 3 individual pipes going into one collector. It's more efficient, not only because it flows better, but it also reduces turbulence inside the pipes by getting rid of the 90 degree angles. Also, they will run the pipes equal lengths so that the pulses aren't all hitting the collector at the same time. If two pulses hit the collecter at the same time, it would cause turbulence. Also this kinda of makes a vacuum in the pipes, so when your exhaust port opens (even before the piston is at BDC) it will start "sucking" the exhaust our of the chamber, also pulling the piston back up a little. This is called "scavenging" which I am sure you have heard of before. The reason they would do a 4-2-1 is to also reduce turbulence, and create a vacuum. Also an "els" weld (if you weld pipe you know what that is) reduces the turbulence even more.

[David Coleman]

~22" primaries collecting into the turbine inlet. ~1.5" should be good. 1.75" reversion chamber ~4" away from the ports, for ~4". Ceramic coated.

[VizualXTC]

Dave, could you draw that up for me? I don't understand how we're gunna go from 6-1. I thought we'd have to go 6-2-1. Put a collector where the stock collector is, then route it from there to the turbine inlet. If you could give me a drawing that would be great.

[David Coleman]

6-2-1 would require 44" primaries, FYI. That's assuming you want to optimise the pulse tuning for 6800RPM or so.

[David Coleman]

Google is good
http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=exhaust+pulse+tuning

[VizualXTC]

Draw it up man

[pelado]

<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr>Originally posted by David Coleman:
~22" primaries collecting into the turbine inlet. ~1.5" should be good. 1.75" reversion chamber ~4" away from the ports, for ~4". Ceramic coated.<hr></blockquote><p>You are such a kidder! 22" primaries from the #1 and #2 cylinders? Where's the turbo going to be mounted, above the engine's vee?<p>Hey Ryan, why not keep it simple? Buy some Hotshots and have someone fab some pipes up to the turbo inlet, keeping them equal length of course.

[phr34k]

if you get this drawn up we could prolly get a group buy going with some local exhaust shops