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Old 09-01-2010, 11:00 AM   #1
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Default Bungalisicous Barbtastic

My Tial BOV flutters. I want to give it an awesome vacuum source so my plan is to drill a hole in my IM plenum (stock 01+) and put a barb on it. I found this wicked barb on http://www.anver.com:



It is a full ******* 3/4 inches. I was considering also boring out my Tial for an equally sized barb on the BOV "helmet".

Is this overkill?
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Old 09-01-2010, 11:14 AM   #2
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Maybe your Tial flutters because they designed it to flutter because ricers like it when it flutters?
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Old 09-01-2010, 11:27 AM   #3
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Originally Posted by faeflora View Post
My Tial BOV flutters. I want to give it an awesome vacuum source so my plan is to drill a hole in my IM plenum (stock 01+) and put a barb on it. I found this wicked barb on http://www.anver.com:



It is a full ******* 3/4 inches. I was considering also boring out my Tial for an equally sized barb on the BOV "helmet".

Is this overkill?
If you're going to go to the trouble of tapping, use pushloc.





Stock vacuum nipple vs 1/4in pushloc

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Old 09-01-2010, 11:30 AM   #4
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Originally Posted by Full_Tilt_Boogie View Post
Maybe your Tial flutters because they designed it to flutter because ricers like it when it flutters?
Doubtful. If you want it to stay closed in vacuum, you're going to hear a little noise at low boost.
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Old 09-01-2010, 12:22 PM   #5
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Originally Posted by pschmidt View Post
If you're going to go to the trouble of tapping, use pushloc.





Stock vacuum nipple vs 1/4in pushloc

Did that help your BOV open more quickly?
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Old 09-01-2010, 12:52 PM   #6
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Old 09-01-2010, 01:24 PM   #7
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Do you have the right spring in it? You shouldn't need 3/4 inch source for it to work properly.
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Old 09-01-2010, 01:32 PM   #8
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Did that help your BOV open more quickly?
Marginally quicker. I tried everything to get the Tial to work. Three different springs, shimming, etc, but I finally threw in the towel and got a SSQ. No more flutter.
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Old 09-01-2010, 04:24 PM   #9
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Originally Posted by fmowry View Post
Do you have the right spring in it? You shouldn't need 3/4 inch source for it to work properly.
wait'll he finds out that the force on the bov is not dependent on the area of the vacuum line.
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Old 09-01-2010, 04:27 PM   #10
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I switched to a larger diameter hose and it worked much better...but worked best with the correct spring.
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Old 09-01-2010, 10:49 PM   #11
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wait'll he finds out that the force on the bov is not dependent on the area of the vacuum line.
???? Well I want the MAP in the BOV to equal the MAP in the plenum as quickly as possible so why wouldn't a bigger vacuum line make the BOV open more quickly?


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Originally Posted by hustler View Post
I switched to a larger diameter hose and it worked much better...but worked best with the correct spring.

Did you go to the black spring, white, unpainted, or pink spring? I used to have the pink spring and it never ever pooshed. Went to the unpainted one now I think and it goes ch ch ch ch poosh. With my current spring the bov is opened just a tiny crack at idle.
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Old 09-02-2010, 04:49 PM   #12
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A bigger hose won't change the time it takes the pressure wave to travel from IM to BOV, a shorter hose will. If you have a leak from the high pressure side to the low pressure side of the BOV which is exaggerated when the BOV is open (poor tolerance machining or intentional fluttering?), then air may leak from the high side to the low side when the BOV opens, which will increase the pressure of the low side of the BOV enough for the spring to momentarily shut the valve before the pressure falls again, and the valve reopens. Perhaps this is the reason behind your flutter?
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