BOV flutters when I let off the gas
Thread Starter
TECH Apprentice
Joined: Aug 2002
Posts: 362
Likes: 0
From: Maple Grove MN
BOV flutters when I let off the gas I put a Apex BOV on my camaro instead of the stock surge valve supplied by ATI. When I let off the gass it makes a fluttering noise like the valve is opening and closing really fast. I thought tightening down the adjusting screw would fix it but its almost all the way down and it still does it. It might not be as bad but its still pretty bad. Should I tighten it all the way or what is the problem?
On The Tree
Joined: Dec 2001
Posts: 186
Likes: 0
From: San Diego, CA, USA
Re: BOV flutters when I let off the gas </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 1slowCamaro:
<strong>Well that really sucks.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes, it sure does.
<strong>Well that really sucks.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes, it sure does.
TECH Fanatic
Joined: Nov 2001
Posts: 1,055
Likes: 0
From: Chi-Town
Re: BOV flutters when I let off the gas You need BOTH the surge valve and the BOV for your system to operate properly
the reason that turbos can get away with just a BOV is because they aren't making boost all the time, its load dependant
whereas with a blower you are always making boost and a little BOV cannot keep bypassing all that air
HENCE
you have a bypass valve......that will allow all the extra air to be bypassed and when you get into boost and let out, both the BOV and the bypass valve will open and it should do the job for ya and shouldn't "flutter"
the reason that turbos can get away with just a BOV is because they aren't making boost all the time, its load dependant
whereas with a blower you are always making boost and a little BOV cannot keep bypassing all that air
HENCE
you have a bypass valve......that will allow all the extra air to be bypassed and when you get into boost and let out, both the BOV and the bypass valve will open and it should do the job for ya and shouldn't "flutter"
Thread Starter
TECH Apprentice
Joined: Aug 2002
Posts: 362
Likes: 0
From: Maple Grove MN
Re: BOV flutters when I let off the gas I was actually thinking about hooking up the surge valve along with it. I cant just take the BOV off because theres a hole in my airbox now. Is there another vaccuum source I can tap into other than the one on the passenger side in front of the PCM?
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
TECH Fanatic
Joined: Nov 2001
Posts: 1,190
Likes: 0
From: Las Cruces, NM
Re: BOV flutters when I let off the gas Well the following information is based on a standard type pressure relief valve used to prevent over pressure of test systems. The only time we see flutter of the valves is they are "over sized" i.e to big its called "chattering the valve". Basically the valve can out flow the supply and closes then the system catches up and it opens again. If the valve does this to much it will damage the seat and then will leak all the time. A BOV is actuated by vacuum correct? The fluttering could be reduced (most likely) by putting a small orifice in the vacuum source line, but this would reduce its reaction time which would be bad.
Gary
Gary
