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Just a thought - I've had great luck with cheap simple glasspacks on many vehicles/engines. They have a reputation as being redneck/hick but they can sound really nice. No drone, as there's no chambers to resonate. inline4, v6, v8, inline6... There are many vids on Youtube. The longer the glasspack, the quieter it is. They are available in SS as well for a bit over $100.
I have a real long one (42"?) on the Chevy 3500 6.0 liter, nice rumble, cruises nice and quiet.
Just a thought - I've had great luck with cheap simple glasspacks on many vehicles/engines. ...........
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I was thinking this as well. I love my Corsa Extremes except for the trumpet like howl at some RPM / throttle settings.
I have often thought that adding glasspacks to the system would tone that down and keep cruising and around town nice and quiet while keeping the WFO sound the way I like it.
Finally made it to the dyno. Nothing impressive to report. Compared to another Z06 with a vararam intake and headers only, it was very similar until around 6000rpm where my cars power and torque dropped off quicker. The drop off could be due to my craptastic air intake setup from the previous owner or all the extra bends in my headers needed to be equal length.
I did get audio and video of it on the dyno but it sounds like complete *** and I'm embarrassed to post it. These mufflers will be coming off as soon as I can get it back on the lift. It's time I made the mufflers I've been wanting to and finally, hopefully, get the sound I'm after.
This reminds me of when I designed a perfect exhaust system for my street rod. Expensive s/s mufflers sucked. Sounded like I was being followed by a group of ricers and it was loud. I had to replace the whole mess. Two complete exhausts in two weeks. Went with traditional turbo mufflers and a newly redesigned system, fixed. My wife rode in the car with me and asked is this going to get better as we continue driving. I said no, it is going to get worse. Good luck with yours, I'm watching.
I am surprised about the outcome of the dyno results.
I would think that having the exhaust events in perfect time alignment would make for freer flow and more torque.
I am curious if the tune has anything to do with it being that it is probably optimized to bring out the best of the exhaust it was set up for.
It was never for astronomical power increases but the sound that they make. If they are at all compatible to a set of long tubes they exceed expectations.
Will start my C7Z 180 degree headers build next week with my fabricator buddy. Thank you for laying the groundwork already. I pray for perfect equal length with all of the runners.
Will start my C7Z 180 degree headers build next week with my fabricator buddy. Thank you for laying the groundwork already. I pray for perfect equal length with all of the runners.
Good luck to the two of you. It should be possible on the C7 as it is on the C5. Equal length is one hurdle, ease of install is another hurdle, and ground clearance is yet another hurdle. Combining all three is the challenge.
Why not sell the design to a manufacturer like ARH or Kooks?
I've been following this topic from the beginning, and I'll say this. "Tinmatt" has done a fantastic job with these headers and the required exhaust system. But if you look at all the work he needed to do, in order to make them "right", you can see all the work that was required.
While some of the time spent was on "trial and error", there is still a considerable amount of cutting/fitting and welding of short lengths of tubing. Compare that to most commercial header designs, which MAY have one or two pieces welded together, to form a primary tube. If someone wanted to duplicate "Tinmatt's" design, I'd be willing to bet that it would be $$$$, even if they were produced in a reasonable volume.
I've been following this topic from the beginning, and I'll say this. "Tinmatt" has done a fantastic job with these headers and the required exhaust system. But if you look at all the work he needed to do, in order to make them "right", you can see all the work that was required.
While some of the time spent was on "trial and error", there is still a considerable amount of cutting/fitting and welding of short lengths of tubing. Compare that to most commercial header designs, which MAY have one or two pieces welded together, to form a primary tube. If someone wanted to duplicate "Tinmatt's" design, I'd be willing to bet that it would be $$$$, even if they were produced in a reasonable volume.
They could probably use a CNC machine, robotics and sub out the work to a job shop to cut cost.
That would require an order of so many as an initial investment though. It could be profitable for a company that is well capitalized and has done this kind of work.
Okay, parts ordered for my C7Z 180 dream. My buddy fabricator will start on Monday I hope.
Here is Rampage Camaro with LS7 and 180 degree! https://youtu.be/l-AqOHv29L0
I literally created an account on here just to get in on this thread. If you can pull this off, I am willing to pay $$$$.
As a side note to this discussion, the latest issue of 'Road&Track' magazine, has an interesting article on Jack Burns, owner/operator/header fabricator of Burns Stainless.
07-31-2017, 09:51 PM
