180 degree headers?

Burninrock24 · Oct 23, 2013

On a thread revival spree here because I've been away from the forums for a while. Busy with school and stuff.

180* headers are a no-go so far. I have however done a LOT of reading about it. I even had a conversation with an automotive engineer about it. I picked up a lot of info and will probably dump some tech about it in another thread if anybodys interested.

However... This plan is not abandoned. So far my plan goes as follows:

- Get a set of long tube headers

- Chop them up before the collectors

- Use flexible tubing and some duct tape to map out the route for the headers

- Get a header kit from Summit

- Fab up my own exhaust of the opposing primaries and run them wherever I can meanwhile trying to keep the length constant.

This probably won't happen until I am done with the school year. But I still REALLY want to do it. My biggest concern will be making them as close to equal length as possible. Also I have some worries about ground clearance from running pipes underneath the subframe where there isn't exhaust routing already. But thats where the flexible tubing will help.

CC'S95GT · Oct 23, 2013

Good luck to you on being origional.
As you already know, there's not much clearance under the stock K member. A tubular might help this some.

maybe some of that "flexable exhaust repair tubing" you can use to mock up the routing without having to cut up perfectly good headers.

MustangChris · Oct 23, 2013

well im glad to hear you're not abandoning it...

and I'd love to read a 180* tech thread stickied in the exhaust section

you could always try and go for a square-shaped pipe on the bottom, instead of round...... just a thought.

Burninrock24 · Oct 23, 2013

Well I already know I won't be able to fit much underneath the K member, I'll most likely have to run them more near where the X pipe already crosses over now. Which is why I could keep the longtubes the same except for cutting off the collector. But we will see! I'm also going to do an experiment on changing the sound of my 4 banger first. If that works, then I'll tackle the Mustang.

MustangChris · Oct 23, 2013

nice...

Burninrock24 · Oct 23, 2013

Example: http://www.youtube.com/watch?v=cuyUWHozAvM

The R1 uses a cross plane crank in its I4 rather than a 180* crank. Since it has this crank, it has uneven firing intervals which gives it that sound.

So by this theory, I could alter the lengths of the individual primaries to have the final pulses exiting to mimic that firing order. Haven't done the math, but in theory I feel like it would accomplish something similar. It would suck performance wise on the 4cyl because it would kill exhaust scavenging at low RPM, but I dont care! lol

Burninrock24 · Apr 20, 2014

Did the math for this, I would have to add .62 meters of pipe to the 1 and 4 primaries, so roughly 2 feet of piping to mimic an extra 90* of timing on the exhaust note. So it doesn't seem that bad and in theory should improve scavenging, but I'm not sure how I feel about it yet. I want to do it to my 4 cylinder first before I were to do it to the mustang I think. Seems like a cool project though.

rz5.0 · Apr 21, 2014

It could get hard trying to shove an extra 2' in a already tight engine bay. .

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Burninrock24 · Apr 21, 2014

Thats what I was thinking too, but they would be running under near the oil pan, but the stock K member might get in the way too.

rz5.0 · Apr 21, 2014

This is one of the few threads I actually check on randomly. Good luck. Keep us posted.
About the best advise i got. .

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