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C5 Z06 180 degree header build thread

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Old 10-06-2017, 06:28 PM   #261
CFHay
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Originally Posted by Tinmatt View Post
It does sound ever so nice yet I'm hoping for more. I'm not sure what is off in it's sound to my ears, maybe they weren't equal length.
Could them being made of inconel play a part in that sound?


Also a bandaide fix for the photobucket problem is to use the photobucket hotlink fix extension, I'm sure it will be patched at some point and not work but at this time it allows us to view hotlinked photos.
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Old 10-11-2017, 05:34 PM   #262
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Fantastic build! Sounds and looks amazing!

I ran into this thread because I was watching a Madram video of Southern Rock Racing and one of the buggies sounded like a small block with 180 headers and I started googling to find him. This came up along the way and I love Vettes, so had to check it out.

Here's the 180 headers on a rock buggy, he comes on at 12:02:


Last edited by Phimosis; 10-11-2017 at 05:35 PM.
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Old 11-13-2017, 09:29 PM   #263
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Hi Matt,
Great thread and great work, your obstacle jumping is second to none. I love the way it all turned out.
Have you considered a 2 into one collector at the mid-pipe and running single exhaust instead of the X-pipe. I ask because I fabbed 180 headers for my 67 Camaro gen 1 smallblock some years ago and ran strait dual exhaust with tails exiting together and it sounded awful. I had two mufflers to work with, Spintechs and Dynomax Ulta-flow. Both were horrible.
I had considered the X but felt 180's didn't need it so I ran 2 into 1 and a single muffler and tail and got the sound I was after. In my case the Ultra flow sounded better than the Spintech.
When I built my collectors I arranged my primaries so the pulses had a rotational pattern through the collector. Like a Gatling gun.
Here is a short clip, just a stock 350:

Back near the beginning of this thread there was mention of Morgan/McClure racing Kodak #4 driven by Sterling Marlin. That car never ran 180 headers, in fact, NASCAR never allowed the use of them or special firing order camshafts. McClure brought Boyd Butler (Dr. Gas) in to design a legal exhaust for them. Boyd brought his oval tubed X-pipe. It gave the team 4 extra horse power and that was enough to dominate on the super speedways.

Last edited by Luwi67; 11-13-2017 at 09:32 PM.
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Old 11-13-2017, 10:10 PM   #264
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Originally Posted by Luwi67 View Post
Hi Matt,
Great thread and great work, your obstacle jumping is second to none. I love the way it all turned out.
Have you considered a 2 into one collector at the mid-pipe and running single exhaust instead of the X-pipe. I ask because I fabbed 180 headers for my 67 Camaro gen 1 smallblock some years ago and ran strait dual exhaust with tails exiting together and it sounded awful. I had two mufflers to work with, Spintechs and Dynomax Ulta-flow. Both were horrible.
I had considered the X but felt 180's didn't need it so I ran 2 into 1 and a single muffler and tail and got the sound I was after. In my case the Ultra flow sounded better than the Spintech.
When I built my collectors I arranged my primaries so the pulses had a rotational pattern through the collector. Like a Gatling gun.
Here is a short clip, just a stock 350:
https://www.youtube.com/watch?v=vaHuRj45bA0

Back near the beginning of this thread there was mention of Morgan/McClure racing Kodak #4 driven by Sterling Marlin. That car never ran 180 headers, in fact, NASCAR never allowed the use of them or special firing order camshafts. McClure brought Boyd Butler (Dr. Gas) in to design a legal exhaust for them. Boyd brought his oval tubed X-pipe. It gave the team 4 extra horse power and that was enough to dominate on the super speedways.
Thanks, much appreciated. I did the same "Gatling gun" pattern on the 180 degree headers I built for my Howe chassis car,


And was aiming for the same result for my Z06. But the flat 4 into 1 collectors did not allow for it.

I have not yet considered a 2 into 1 collector as the C5 chassis does not lend itself to a single exit exhaust very well. I would be interested to see how you made it happen under your first gen Camaro.

The X pipe certainly did not live up to my expectations. I have found that the old school way like the GT40s ran back in the Ferrari dominating days to give the best sound. I am currently happy with the sound through the factory Z06 mufflers but do wish to try some other options. I had some ideas but after trying a set of GHL bullets, I need to revisit what I thought would make the music I am after.

Very interesting to hear the story behind the #4 Kodak car. I had seen mentions of Dr Gas and his contributions but did not know exactly what they were.
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Old 11-13-2017, 10:45 PM   #265
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Yeah, the GT40 with it's short exhaust sounds best. After my shock and disappointment of my duals I did some research and thought maybe it was the long length of the rest of the exhaust that was giving the note such an awful sound. I stumbled onto some videos of a front engine race car doing some Swiss hillclimb racing with the sound I was after. This car was running 180 crossover headers and a single exhaust exiting in front of the rear wheel (NASCAR Monte Carlo). I gave the single exhaust a try and I was so relieved the 3 months I spent fabbing these 180's in the egine compartment of the 67 wasn't wasted.

I have an old thread on the Team Camaro, unfortunately the photos fell to the photobucket deal. This is the link: http://www.camaros.net/forums/33-cam...67-camaro.html
Definitely not as comprehensive as your thread but, there is a few pics.

I keep imagining your car at an muffler shop up on a lift and when the tech walks under and looks up at your exhaust his head explodes.

P.S Sorry my video link attached as a giant video, it was supposed to be just a small highlighted link.

Last edited by Luwi67; 11-13-2017 at 10:48 PM.
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