Exhaust Bypass Valves

[John V]

Originally Posted by boggtown

Since the pipe to the muffler makes a U after the cat, we were going to cut that section out and add a pipe to make it a Y pipe. The actual vavle would be inside of that U. There will be plenty of space considering the valve is relatively small. I plan to just run the wires where the stock O2 sensors run into the car.

So, to be clear, you're going to have a 2" straight pipe which can be used to bypass the muffler using your valves?

I can tell you from experience that a 2" diameter straight pipe positioned right there will be loud. And incredibly droning.

[dcporsche99]

Wow, looking forward to it! Good luck!!

Originally Posted by John V

So, to be clear, you're going to have a 2" straight pipe which can be used to bypass the muffler using your valves?

I can tell you from experience that a 2" diameter straight pipe positioned right there will be loud. And incredibly droning.

Heck yes its gonna be loud. But droning can be easily fixed with a flick of a switch. Its almost all for the sound, but if I get any top end it will be of good use at the track. Heres a picture of the planned layout.

[RandallNeighbour]

It would be a heck of a lot cheaper and easier just to pull the U tube out from the muffler when you get to the track than go through all you're doing now IMO.

But how will I do that while driving next to a fart can honda and blow them away with my awesome sounding engine? I want a louder exhaust like 98% of this forum, by getting bypass valves, I can get loudness, mediumness, or quiet instantly and keep the woman happy or open the valves as soon as she gets out of the car so I can scare small children.

[Adam]

I can't wait to see the outcome of this project.

[John V]

Originally Posted by boggtown

But how will I do that while driving next to a fart can honda and blow them away with my awesome sounding engine? I want a louder exhaust like 98% of this forum, by getting bypass valves, I can get loudness, mediumness, or quiet instantly and keep the woman happy or open the valves as soon as she gets out of the car so I can scare small children.

The only problem is that it doesn't really sound good when the muffler is off. It's just boomy and obnoxious. Given that there is no performance increase at all to running straightpipes (with the possible exception that with real straightpipes you can eliminate the weight of the muffler) it doesn't seem worth it. But, your car.. knock yourself out!

[djomlas]

so you want your car to sound louder than a fartcan on a honda? am i getting this right? and y are you even trying to impress honda boys anyways...they already got it bad
there is a difference b/w a nice sounding exhaust that is pleasant to listen to, and annoyingly loud.

[John V]

This is true. And I can tell you from experience that a Boxster with no muffler sounds absolutely terrible. When I was building my custom exhaust I tried it. Not good.