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BMW 3-Series (E90 E92) Forum
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BOV Flutter
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09-14-2013, 05:08 AM | #1 |
Private First Class
38
Rep 147
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BOV Flutter
I recently got a Tial BOV with a ER Chargepipe from TGS. I'm running around 17PSI with E85.
At mid-throttle, I am getting fluttering out of the BOV which I understand is probably compressor surge. I probably got 11psi springs as that is what ER typically ships out with the Tial and most people are ok with. Do I need a lower psi spring? or is there a reason why the 11psi doesn't work with my setup? Perhaps the BOV is defective? Thanks in advance! |
09-14-2013, 10:48 AM | #2 |
Captain
321
Rep 710
Posts
Drives: 23 M3 Competition
Join Date: Feb 2013
Location: NJ
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TiAL offers a 7lb, 8lb, 11lb and 12lb spring for their blowoff valve. This is what TiAL recommends when choosing a blowoff valve spring.
Measure engine vacuum at idle. ( engine at operating temperature ) Vacuum Reading Between ----------------------------------------- Use Spring -22 in/hg and -23 in/hg -------------------------12 psi (-24 in/hg) -18 in/hg and -21 in/hg -------------------------11 psi (-22 in/hg) -14 in/hg and -17 in/hg -------------------------9 psi (-18 in/hg) -10 in/hg and -13 in/hg -------------------------7 psi (-14 in/hg __________________ |
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09-14-2013, 01:52 PM | #3 |
Private First Class
38
Rep 147
Posts |
Well.. I had a vacuum leak alright... I never connected the hose from the top of the Tial BOV to the TB. Oops. Problem resolved.
Last edited by enigma99a; 09-15-2013 at 10:12 PM.. |
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