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SVTPerformance's Chain of Restaurants
The Blower Bistro
Trying to end BOV debate
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<blockquote data-quote="BADD281" data-source="post: 10394695" data-attributes="member: 67941"><p>Lets just use this to end it...</p><p></p><p>My car runs at 14inches of vacuum at idle (heads/cams 2V)</p><p></p><p>When I first finished my motor build I used a Tial Q turbo spring bov (one of the best at evacuating boost quickly). I believe a 10inch spring was used which is still pretty soft for a turbo spring. Whenever I would let out of high boost (17psi) I would get a bit of surging, during daily driving I noticed a bit higher IAT temps just cruising around, and I could here the valve flutter between shifts in town.</p><p></p><p>Now we move to the current bov. I switched to a Tial Alpha Q with the "3psi" supercharger spring. This valve now vents much more air at idle and when letting out the same 17lbs of boost there was ZERO surging whatsoever. Cruising around the street the IAT's are back to near ambient temps and when shifting through the gears during regular driving there is ZERO flutter.</p><p></p><p>Some people continue to use the turbo spring bov's since they do still evacuate air but I strongly believe with the supercharger to get the most efficient setup you should run at least a spring that is meant for a supercharger. I always chime in on these threads and may post like I am trying to know it all but I simply go off of my experience with the two. Also, some people seem to remain hard headed no matter how much information you beat into their heads because they HAVE to have a turbo bov that is really loud. People need to realize, you couldn't afford the turbo so stop trying to make your car sound identical to one with a turbo bov and stiff spring.</p><p></p><p>On another note regarding the Greddy valve, I almost ran a Type R and I am not sure how different the springs are between that and the Type S. My tuner has setup a few cars with superchargers and has found that even the softest spring in those can be too stiff, many times he has been forced to pull the spring and cut them to work without surging issues. The Tal Alpha Q is made to be recirculated and now they offer an adapter that goes onto the alpha Q which turns it into a recirculating valve as well.</p></blockquote><p></p>
[QUOTE="BADD281, post: 10394695, member: 67941"] Lets just use this to end it... My car runs at 14inches of vacuum at idle (heads/cams 2V) When I first finished my motor build I used a Tial Q turbo spring bov (one of the best at evacuating boost quickly). I believe a 10inch spring was used which is still pretty soft for a turbo spring. Whenever I would let out of high boost (17psi) I would get a bit of surging, during daily driving I noticed a bit higher IAT temps just cruising around, and I could here the valve flutter between shifts in town. Now we move to the current bov. I switched to a Tial Alpha Q with the "3psi" supercharger spring. This valve now vents much more air at idle and when letting out the same 17lbs of boost there was ZERO surging whatsoever. Cruising around the street the IAT's are back to near ambient temps and when shifting through the gears during regular driving there is ZERO flutter. Some people continue to use the turbo spring bov's since they do still evacuate air but I strongly believe with the supercharger to get the most efficient setup you should run at least a spring that is meant for a supercharger. I always chime in on these threads and may post like I am trying to know it all but I simply go off of my experience with the two. Also, some people seem to remain hard headed no matter how much information you beat into their heads because they HAVE to have a turbo bov that is really loud. People need to realize, you couldn't afford the turbo so stop trying to make your car sound identical to one with a turbo bov and stiff spring. On another note regarding the Greddy valve, I almost ran a Type R and I am not sure how different the springs are between that and the Type S. My tuner has setup a few cars with superchargers and has found that even the softest spring in those can be too stiff, many times he has been forced to pull the spring and cut them to work without surging issues. The Tal Alpha Q is made to be recirculated and now they offer an adapter that goes onto the alpha Q which turns it into a recirculating valve as well. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
Trying to end BOV debate
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