Tequipment Sport Exhaust Modification

[atomichead]

I have a 2001 ‘S’ with the Tequipment Sport Exhaust. The car sounds great from about 4500 rpm on up. I believe this has more to do with the exhaust’s bypass valves than with the engine coming on cam. I’d like to get this great Porsche sound earlier in the rev range without buying a new exhaust system.

I don’t know how the bypass valves are actuated: mechanically or electronically. Has anyone ever modified the valves to get them to actuate earlier in the rev range? Any ideas out there? Thanks…

[mrmickeymouse]

Did they install the switch to turn it on and off.

Scott

[Tool Pants]

The valves that operate the flaps are controlled by vacuum. The vacuum is controlled by wires to the speed sensor. At 27-42 miles per hour the flaps close, and I assume this is determined by the special relay that comes with the sport exhaust. I do not know how you can change the mph settings. The simplest thing is to disconnect the vacuum line to each valve and plug the lines. Then the bypass pipes will be open all the time.

If you have the exhaust as a factory option then it did not come with a switch in 2001. I have assumed your sport exhaust was optioned with the car.

[atomichead]

The car was optioned with the exhaust and there is no on/off switch.

TP, if the bypass valves are vacuum actuated then wouldn't disconnecting them leave them closed? The valves are located in the middle of the bypass pipes that circumvent the exhaust, so I'm assuming here that they're opened when the electrical relay activates and allows vacuum to the them . Also, if they energize at as little as 27-42 mph, why bother having the bypass at all?

Not trying to pick a fight (you've probably forgotten more about the breed than I know), just trying to clarify what I should try.

[Tool Pants]

The flaps are open unless there is a vacuum to the actuators on each side of the exhaust. The flaps close at 27-42 and then exhaust is sent into the muffler because that is when the vacuum pulls the actuators/flaps closed. So if you disconnect and plug both vacuum lines then the valves are open all the time.

This is to meet euro drive by noise regulations, for when you are driving slowly through a small village. The sport exhaust is sold around the world; there are no different versions of the sport exhaust for different countries. I am on the German Boxster message board and there are Swiss and German people on the board. The Swiss blame the Germans and the Germans blame the Swiss. From what I have read over the years I think the Swiss have the strictest noise requirements.

If you have been around a while Porsche use to brag how it could meet the noise regulations in all countries with the standard exhaust, as the outlet for the muffler is in the middle of the car and the sound meter is placed on the side of the car as it drives by the meter.

If you have been to our local track, Laguna Seca, you see some funny looking exhaust set ups because there is a sound limit as homes have been recently built in the area. The meter is on the right side of the track, so they point the exhaust to the other side to beat the sound meter. :D

[atomichead]

So the muffler is only used in the 27-42 mph window?

[Loren]

So the muffler is only used in the 27-42 mph window?

Correct.

[atomichead]

Not worth the effort. Thanks for your help guys.

[marspilot]

Here is my dilemma-

I have a 2002 Boxster S built in Dec of 2001. I just purchased the Porsche Sport Exhaust, Model 000-044-200-12.

So far, so good.

Here's the question. My Porsche dealer wants to install it, but they do not have the TSB for this exhaust. They only have the TSB for

Model 000-044-200-20, which is for 2003 Boxsters on up.

The mechanic feels that the install will be pretty much the same on this, and that he can add the 996 push button switch to operate this older exhaust.

I am wondering the following:

A. Do you think this is possible?

B. I know you have said that you can install the Sport Exhaust without hooking up all the other vacuum and other stuff, but if you don't use all the stuff in the box, don't you need to put something over some of the openings, tubes, etc on the exhaust unit?

C. Where can I get the TSB for the right way to install this older version of the unit.

D. Does Porsche actually say its cool to just throw the unit on sans hoses etc?

I really appreciate your time and effort on this.

Much thanks for all the great support you give us rookies.

Mike :drive:

[Loren]

Here is my dilemma-

I have a 2002 Boxster S built in Dec of 2001. I just purchased the Porsche Sport Exhaust, Model 000-044-200-12.

So far, so good.

Here's the question. My Porsche dealer wants to install it, but they do not have the TSB for this exhaust. They only have the TSB for 

Model 000-044-200-20, which is for 2003 Boxsters on up. 

The mechanic feels that the install will be pretty much the same on this, and that he can add the 996 push button switch to operate this older exhaust.

I am wondering the following:

A. Do you think this is possible?

B. I know you have said that you can install the Sport Exhaust without hooking up all the other vacuum and other stuff, but if you don't use all the stuff in the box, don't you need to put something over some of the openings, tubes, etc on the exhaust unit?

C. Where can I get the TSB for the right way to install this older version of the unit.

D. Does Porsche actually say its cool to just throw the unit on sans hoses etc?

I really appreciate your time and effort on this.

Much thanks for all the great support you give us rookies.

Mike :drive:

A. Yes.

B. No. If you don't hook up the vacuum and electronics stuff the exhaust valves are always open (loud).

C. I will send you a PM with it attached.

D. Of course they don't recommend the no hoses way - they don't get 10 hours of labor if you do it that way.