Guest getmoregetmint Posted October 2, 2008 Share Posted October 2, 2008 personally, i don't think this warrants a separate thread but not sure where else I could ask has the dump valve of the camera car got like a special name, and is it different in anyway to a normal one, or is it just the sound. i think Jeremy Clarkson once described it on top gear as like squirrels being fed into the engine ha Quote Link to comment Share on other sites More sharing options...
Guigsy Posted October 2, 2008 Share Posted October 2, 2008 thats not a BOV, thats compressor stall. The argument still goes on regards if its a good thing to have or not. imo it sounds cool. And various people have said it doesnt harm the turbo but there are the same ammount of people who say the oposite This supra has the same. http://uk.youtube.com/watch?v=aal9kG-EXeY Quote Link to comment Share on other sites More sharing options...
Guest getmoregetmint Posted October 2, 2008 Share Posted October 2, 2008 so what does it do? Quote Link to comment Share on other sites More sharing options...
Pig Posted October 2, 2008 Share Posted October 2, 2008 you need to have a single for that noise. Quote Link to comment Share on other sites More sharing options...
patrikbrunt Posted October 2, 2008 Share Posted October 2, 2008 As far as I understand it, compressor stall occurs when you dont have a blow off / dump valve, and so when the throttle is closed, pressure remains between the compressor and the intake, and the only route for it to take is back through the compressor, causing it to 'stall'. the noise it makes is the air being 'chopped' so to speak by the compressor blades. correct me if im wrong? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 2, 2008 Share Posted October 2, 2008 Funny, i used to get a certain amount of stall with an HKS BOV with my hybrid setup, but now i have a single and a Tial replica BOV i get massive dumps:blink: but no stall Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted October 2, 2008 Share Posted October 2, 2008 As far as I understand it, compressor stall occurs when you dont have a blow off / dump valve, and so when the throttle is closed, pressure remains between the compressor and the intake, and the only route for it to take is back through the compressor, causing it to 'stall'. the noise it makes is the air being 'chopped' so to speak by the compressor blades. correct me if im wrong? Hmm, Comp stall occurs in all TT supra's i believe. I get it in my Supe if you hit it at the right revs and most members will have the same thing... I think it's more extreme in a single turbo Supra as the boost is alot higher hence the more air is bring pushed back into the compressor causing it to stall... Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 2, 2008 Share Posted October 2, 2008 Compressor stall occurs if there is no BOV or it is not efficient enough, IE doesn't dump enough pressure/volume of air, also BOV positioning also can have an effect on this. Quote Link to comment Share on other sites More sharing options...
Scoboblio Posted October 3, 2008 Share Posted October 3, 2008 Hmm, Comp stall occurs in all TT supra's i believe. I get it in my Supe if you hit it at the right revs and most members will have the same thing... I got no stall at all in mine with a stock BOV. When i changed to an SSQV I'd get a bit of stall if i lifted off too gently for the SSQV to open. Quote Link to comment Share on other sites More sharing options...
bodilx6 Posted October 3, 2008 Share Posted October 3, 2008 Stall (or compressor surge) happens, as mentioned, when the the throttle closes and the build up boost has ne where to go but back into the turbo compressor. This is the sound you hear and the point of a BOV (either the bypass type as stock or the vent-to-atmosphere type most people add). The myth about it only being possible in large single turbo setup is due to the higher air flow, the more pressure is needed to be releaved through a BOV that might not handle it. Therefore big setups sometimes use dual BOVs. Some say it hurts the turbo since the pressured air slows the compressor down faster that it would on its own and there might be something about that but you would probably need quite a lot of presse for it to really matter. One thing is for certain though, is that it does do any good, functional speaking. It might sound good, but who wants their turbo to quicker slow down than nessesary between shifts? That will only lead to longer time to build boost again... Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 3, 2008 Share Posted October 3, 2008 Stall (or compressor surge) happens, as mentioned, when the the throttle closes and the build up boost has ne where to go but back into the turbo compressor. This is the sound you hear and the point of a BOV (either the bypass type as stock or the vent-to-atmosphere type most people add). The myth about it only being possible in large single turbo setup is due to the higher air flow, the more pressure is needed to be releaved through a BOV that might not handle it. Therefore big setups sometimes use dual BOVs. Some say it hurts the turbo since the pressured air slows the compressor down faster that it would on its own and there might be something about that but you would probably need quite a lot of presse for it to really matter. One thing is for certain though, is that it does do any good, functional speaking. It might sound good, but who wants their turbo to quicker slow down than nessesary between shifts? That will only lead to longer time to build boost again... I'm afraid that compressor surge is something completely different to compressor stall;) Quote Link to comment Share on other sites More sharing options...
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