Kelly Moss 968 Turbo Video
#17
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Duke: I'm not sure what you mean by the BOV being too stiff to open. Can you elaborate? In the video there are some supplemental sounds that are not BOV related. For example, on the in car footage the rattle you hear during shifting is actually a loose shifter - got to get that fixed. On the first outside run the car is spinning it's 315/35's when I shift gears.
#19
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Duke: I'm not sure what you mean by the BOV being too stiff to open. Can you elaborate? In the video there are some supplemental sounds that are not BOV related. For example, on the in car footage the rattle you hear during shifting is actually a loose shifter - got to get that fixed. On the first outside run the car is spinning it's 315/35's when I shift gears.
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#20
Nordschleife Master
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Solo, perhaps I went through the first clip a bit too fast, but in some cases it does not seem to open as Divine is writing above. I used a Tial BOV with the stiffest spring myself on my 968 turbo engine and it always opened enough to avoid any flutter noise.
Here's a short clip of how it sounded in my 968 turbo setup:
http://www.youtube.com/watch?v=18Nc49HrJX4
Here's a short clip of how it sounded in my 968 turbo setup:
http://www.youtube.com/watch?v=18Nc49HrJX4
#22
Three Wheelin'
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i've never heard of the above described with 2 separate names for each type of circuit before. I've always known it as one item thats either plumbed back (recirculating) or not, but use of the name- recirculating valve, pop-off valve, BOV, DV- depending on whose forums I was reading (what market/country, genre).
#23
Bannana Shine
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i've never heard of the above described with 2 separate names for each type of circuit before. I've always known it as one item thats either plumbed back (recirculating) or not, but use of the name- recirculating valve, pop-off valve, BOV, DV- depending on whose forums I was reading (what market/country, genre).
On the other hand, I haven't really conversed with a lot of people from outside the US on DVs and BOVs, so for all I know, it could be a regional thing.
And to make things even more confusing, some manufacturers (Forge, at least) are now making hybrid valves that can recirculate some of the charge air and vent the rest to atmosphere. I think they may even be adjustable, although I can't remember whether it's a continuous adjustment, or just 100/0, 50/50, and 0/100.
#24
Three Wheelin'
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ah k.
well, its kindof like external wastegates. you can vent to atmosphere with a screamer pipe (local term, same for you guys?) or plumb back into the exhaust a'la 924 & 944 turbo. I had just assumed that some BOV's were made to recirculate and some weren't and that somecan be adjusted to do either, like an external wastegate.
well, its kindof like external wastegates. you can vent to atmosphere with a screamer pipe (local term, same for you guys?) or plumb back into the exhaust a'la 924 & 944 turbo. I had just assumed that some BOV's were made to recirculate and some weren't and that somecan be adjusted to do either, like an external wastegate.