MysticBlueX3
Ready to race!
- Location
- Bay Area
Installed a Neuspeed P-Flow intake and CTS turbo muffler delete the other day. I took the car for a spin after the install and immediately noticed the extra intake noise. What I did not expect was a psssssst sound when I let go of the throttle which resembles a BOV noise. At first, I was like cool. Not expected but I like it. Then I started thinking some more. The pssssst BOV like sound can’t be coming from the new intake. Logic says that if its not the intake, it must come from the other new item. The turbo muffler delete. But the turbo muffler delete actually removes the openings found in the stock turbo muffler. So that means I have a poor seal or a leak somewhere. Then I immediately knew what my mistake was.
When I took the stock turbo muffler off, I saw that there was a rubber o-ring sitting on the flange. So I figured, I should put it on the turbo muffler delete flange. WRONG! After the install, I realized that the turbo muffler delete has its own o-ring and that the longer turbo muffler delete seals at the end of the adapter and not at the flange like the shorter stock turbo muffler. By placing the much larger diameter stock o-ring on the turbo muffler delete flange, it seated improperly and I actually created a poor seal between the turbo muffler delete and the turbo outlet thus creating an accidental blow off valve.
On the left is the stock turbo muffler. You can see a black o-ring on the underside of the flange in the middle. That is the stock o-ring I took off and place on the turbo muffler delete. On the right is the CTS turbo muffler delete. The o-ring is on the very bottom. My mistake is putting the larger stock o-ring on the turbo muffler delete flange.
You can see in this photo that when installed, the stock o-ring is actually hanging out past the flange and the bottom bolt.
Now I haven’t noticed any decrease in power nor did the car throw any errors. In theory, my boost level should be lower because I have a leak in the system. But I guess its so minimal that I’m not noticing any drop in power. But the leak is enough where the back pressure can escape when I let off the throttle to create the BOV pssssssst sound. In the end. I’ve decided to let it be and enjoy the BOV sound until I have time to go back in there and remove the stock o-ring.
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When I took the stock turbo muffler off, I saw that there was a rubber o-ring sitting on the flange. So I figured, I should put it on the turbo muffler delete flange. WRONG! After the install, I realized that the turbo muffler delete has its own o-ring and that the longer turbo muffler delete seals at the end of the adapter and not at the flange like the shorter stock turbo muffler. By placing the much larger diameter stock o-ring on the turbo muffler delete flange, it seated improperly and I actually created a poor seal between the turbo muffler delete and the turbo outlet thus creating an accidental blow off valve.
On the left is the stock turbo muffler. You can see a black o-ring on the underside of the flange in the middle. That is the stock o-ring I took off and place on the turbo muffler delete. On the right is the CTS turbo muffler delete. The o-ring is on the very bottom. My mistake is putting the larger stock o-ring on the turbo muffler delete flange.
You can see in this photo that when installed, the stock o-ring is actually hanging out past the flange and the bottom bolt.
Now I haven’t noticed any decrease in power nor did the car throw any errors. In theory, my boost level should be lower because I have a leak in the system. But I guess its so minimal that I’m not noticing any drop in power. But the leak is enough where the back pressure can escape when I let off the throttle to create the BOV pssssssst sound. In the end. I’ve decided to let it be and enjoy the BOV sound until I have time to go back in there and remove the stock o-ring.
Sent from my iPad using Tapatalk
