soclosenotnear
Active member
- Joined
- Oct 12, 2011
- Location
- summerville, south carolina
I recently pressure tested my 1995 944t to check for boost leaks. Among others, I had a leaking cbv. This sparked my interest and so the research began. I learned (apparently) that our cbv's only work well to around 15 psi and then something is needed with a stronger spring. I'm running 20 psi out of a td04hl-16t.
After more reading, I learned they tend to make a fluttery noise when leaking. I notice mine making this kind of noise whenever I try and maintain a lower boost, say 5 or 10 psi. I didn't even realize the cbv functioned except when closing the throttle. Do they function under any manipulation of the throttle?
So, I swapped my cbv out with a spare from a 13c. They both appeared the same and in fine shape. I haven't pressure tested again but no difference when driving.
Where do I go from here? And what is my ignorance on the subject missing? Ipd sells one for $40, which I've read is alright, but haven't read much on then at higher boost levels. Forge makes one apparently? Others have used some srt4 thing? ... Others?
After more reading, I learned they tend to make a fluttery noise when leaking. I notice mine making this kind of noise whenever I try and maintain a lower boost, say 5 or 10 psi. I didn't even realize the cbv functioned except when closing the throttle. Do they function under any manipulation of the throttle?
So, I swapped my cbv out with a spare from a 13c. They both appeared the same and in fine shape. I haven't pressure tested again but no difference when driving.
Where do I go from here? And what is my ignorance on the subject missing? Ipd sells one for $40, which I've read is alright, but haven't read much on then at higher boost levels. Forge makes one apparently? Others have used some srt4 thing? ... Others?