Straight Pipe Solution?
zenit
Band Wagon
The date of my purchase for my first wagon is approaching.
-85 Wagon, manual, 60k.
I've solidified that I will replace the keihin carb with a weber, and now I'm beginning to have dreams of opening the exhaust.
Also, in Texas, those vehicles that are 25 years+ can be classified as a "Classic Car", meaning they do not have to deal with emissions testing. (I love this state!)
So my initial thought: Just pull off the muffler! However, I remember the effects of removing the muffler from my first motorcycle (fzr600, '96), leaving only the exhaust manifold and the downpipe. It turned the "Yin-Yin" and tin can rattle into a throaty growl. Conversely, I lost most of my low end power and the bike didn't run really well until I put it back on.
I used this website to make a calculation of the ideal size pipes.
http://victorylibrary.com/mopar/header-tech-c.htm
According to this calculator- the 1.5 with 6.8k redline would work best with a 1.2" straight pipe!
The Stock is 1 7/8?
What can I do about this?
A reduced size pipe will require a smaller manifold too. I'm sure I could find larger, but a smaller than stock manifold?
Anyone have any ideas?
After doing some research- it seems like I would still have the same problem with the car.
Also, I like the sound of straight/open pipes, but I also like my ears. The logical solution is an exhaust that preserves openness but still works. I've built a straight through "Custom" exhaust with a friend for his bike once (ninja 250). It involved gutting his old can, inserting a perforated tube and some two stroke stuffing into the surrounding space. It sounds like glasspacks/cherry bombs are about the same thing.
So I would remove the muffler, take a long straight section of the exhaust, perforate (read: drill lots of holes), and encase it in fiberglass/two stroke stuffing, with a larger tube holding the packing by welds or rivet&sealant.
However, I'm skeptical. There must be a reason why no one does this. Some other wrench turner would have made a custom glass pack, but I can't find anything to corroborate that.
Thoughts?
-85 Wagon, manual, 60k.
I've solidified that I will replace the keihin carb with a weber, and now I'm beginning to have dreams of opening the exhaust.
Also, in Texas, those vehicles that are 25 years+ can be classified as a "Classic Car", meaning they do not have to deal with emissions testing. (I love this state!)
So my initial thought: Just pull off the muffler! However, I remember the effects of removing the muffler from my first motorcycle (fzr600, '96), leaving only the exhaust manifold and the downpipe. It turned the "Yin-Yin" and tin can rattle into a throaty growl. Conversely, I lost most of my low end power and the bike didn't run really well until I put it back on.
I used this website to make a calculation of the ideal size pipes.
http://victorylibrary.com/mopar/header-tech-c.htm
According to this calculator- the 1.5 with 6.8k redline would work best with a 1.2" straight pipe!
The Stock is 1 7/8?
What can I do about this?
A reduced size pipe will require a smaller manifold too. I'm sure I could find larger, but a smaller than stock manifold?
Anyone have any ideas?
After doing some research- it seems like I would still have the same problem with the car.
Also, I like the sound of straight/open pipes, but I also like my ears. The logical solution is an exhaust that preserves openness but still works. I've built a straight through "Custom" exhaust with a friend for his bike once (ninja 250). It involved gutting his old can, inserting a perforated tube and some two stroke stuffing into the surrounding space. It sounds like glasspacks/cherry bombs are about the same thing.
So I would remove the muffler, take a long straight section of the exhaust, perforate (read: drill lots of holes), and encase it in fiberglass/two stroke stuffing, with a larger tube holding the packing by welds or rivet&sealant.
However, I'm skeptical. There must be a reason why no one does this. Some other wrench turner would have made a custom glass pack, but I can't find anything to corroborate that.
Thoughts?
Comments
Also, I don't think the stock pipe is 1 7/8". It probably is closer to 1 1/2.
I thought about using a commercial glass pack, but then, finding one for the size and length.
Ideally, I would like to build it with as long as possible to reduce the noise as long as much as possible. Also, a longer glasspack would have a insulating effect on the exhaust? The longest I've found is 42"x2".