I'm starting to think about exhausts, but this little mod has me thinking for my 03 996 since I have the factory quad tips and don't want to lose them.

Who's done it and anyone located in NJ? How much did it cost? How did you explain the hack to the exhaust shop?

Any loss in power/torque in the low or high end.

How loud is it? Also why did you go this way over gutting the insides of the factory exhaust.

 

PSE is louder than stock but still fine-- fab bypass is a whiole other ballgame
I might switch back to pse from bypass
Mike

 

I modified mine according to the instructions and pictures found at the link below. Total cost was about $30 for materials. I did the R&R work myself and got my nephew to tig weld the connections for free. There are sound clips in this same posting.

http://forums.rennlist.com/rennforum...ferrerid=51262

 

Well if you decide to switch and want to sell the PSE, I might be interested then. I'm not sure the welding hack can be done easily after looking at the pics on rennlist now, but I don't weld so now I'm thinking a local muffler shop who hasn't done it before might mess it up since it Stainless Steel.

 

I've done it. $125 at a muffler shop. I showed them these pics, handed them the mufflers, and said do this. It's pretty easy once you see the before and after pics. All you need is that little elbow pipe. At idle, it's about 15% louder and sounds more hollow. During heavy acceleration and esp. wide open throttle, it's much louder. I went this way because it sounds just like the factory PSE, it was easy, and it was cheap. No loss or gain in power.

 

Did they use stainless steel pipe? Did they TIG weld?

 

Yes, stainless steel pipe. It was either a MIG or TIG weld, not sure which. They used a blowtorch to remove the circular plug on the end of the can. Then they connected the open hole to the short pipe. BTW, the pictures are not mine. Just some I found while researching the hack.

 

I think calicolin's mod is sometimes refered to as mkII; meaning it still leaves one chamber functioning in the muffer. The one I followed is called mkI and in this version you bypasses the entire muffler using a smaller diameter SS pipe.

Some of the posts comment that later model muffers [after '02 I think] are already slightly opened up internally so for them the mkII approach may be enough.

 

Wow, bypassing the muffler completely using what you call the mkI technique must be loud! I started the engine after I removed the cans and blipped the throttle just to see how it would sound and that sucker shook the garage. Granted, a smaller pipe would compensate somewhat. But if you were going to go that route, couldn't you just run straight pipes out the back and lose the cans completely? That would save a lot of weight. Keep in mind, there has also been some debate as to the merits of losing all backpressure created by the mufflers. Some have said that this actually reduces some parts of the power/torque curve if you don't remap the ECU. Anyway, the method that I used emulates the factory PSE exactly, with the exception of being able to shut it off at the touch of a button.

 

I considered loosing the mufflers, too, and I also started mine up without them, but while it sounds nice I came to the conclusion that for me it would be way too loud as my daily driver.

The mkI does retain a lot of the 'crisp' sound that you experinced without the mufflers which I think is the drop in back presssure. I haven't heard the mkII approach live, so I can't commnet there.

I expect the ECU to re-learn its fuel settings over a period of few weeks. So far, my fuel mileage has gone up about 1MPG, but I think this is just warmer outside air temps. The low-speed drivability does seem to have improved; doesn't stall as easily when leaving a stoplight, for example.