Exhaust Bypass Valves

Hey guys, I just bought these electric bypass valves and will be doing a write up along with dyno tests over the next couple weeks. I bought the valves and will have them installed within a week or two. I contacted PorscheDoc and got the low down on doing some dyno runs. So everything is falling into place. I bought dual 2 inch valves from Charles (http://www.badlanzhpe.com/index.html) and they are the best value out there if you want sound and maybe some top end (we will find out when I dyno them). I spent a total of $270 and that is a drop in the bucket compared to a $1000 muffler, and it will be louder and resonance free... if I want it to be. Any feedback will helpful. Let me know what you think.

Expect Updates!

[RandallNeighbour]

Exactly where do you plan to put these?

[xclusivecar]

I'm looking forward to this!! Having not wanting to drop thousands on an exhaust and not wanting to take a chance on resonance and the constant drone of a cat-back type system this can be the perfect solution! Quiet or loud depending on the mood of the moment. My only concern would be the placement in the exhaust system (ground clearance) and the motors freezing/breaking in the "open" position. As far as gains in power...I doubt it...like all the other exhaust systems on the market this would be great for sound only...

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.

[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.

[noone986s]

Yeah I thought about that too. There is a guy here who did it himself.

http://www.ppbb.com/boards/ppbbphp/showflat.php?Cat=&Board=ARCHIVES&Number=1067764&page=8&view=collapsed&sb=5&o=7&fpart=1