Project muffler modification -Complete
Racer
Joined: Feb 2012
Posts: 372
Likes: 15
From: Florida
Bruce, I am indeed a former 993 owner, but I'll be picking up a '96 Aventurine Green coupe on Monday - back in the saddle again!
I was going to do a DIY muffler rework a la RSRs, but the external bypass is nice and simple. And allows for the cutout... I looked at using Quicktime Performance's valve, available for about $300 the pair. That takes a standard hotrod 3-bolt flange of 2.25". Not knowing what size the 993 pipe is, I assumed it would need a couple of adapters, which are more expensive than straight tube - is the 993 tube also 2.25"? This would reduce cost considerably.
So then one has a variable valve in the exhaust, able to go from full muffler to full bypass. Add a rheostat or multiposition switch over the radio and voila. Quiet in the nabe, loud on the road, open on the track...
I was going to do a DIY muffler rework a la RSRs, but the external bypass is nice and simple. And allows for the cutout... I looked at using Quicktime Performance's valve, available for about $300 the pair. That takes a standard hotrod 3-bolt flange of 2.25". Not knowing what size the 993 pipe is, I assumed it would need a couple of adapters, which are more expensive than straight tube - is the 993 tube also 2.25"? This would reduce cost considerably.
So then one has a variable valve in the exhaust, able to go from full muffler to full bypass. Add a rheostat or multiposition switch over the radio and voila. Quiet in the nabe, loud on the road, open on the track...
Did you ever do a valve install? I just went through this thread start to finish & didn't notice that anyone ever did that.
Also - someone asked about dyno checks. Anyone ever do before/after dyno runs???
Intermediate
Joined: Jul 2011
Posts: 25
Likes: 0
From: Europe
I did. System similar to 996 with PSE. In my opinion it's a waiste of time and money. You will never switch it to 'silent' mode. I never finally wired mine, only tested by connecting/disconnecting the vacuum.
