how do check valves work ?
#2
Honda-Tech Member
iTrader: (6)
Join Date: Sep 2000
Location: Los Angeles, CA, USA
Posts: 12,369
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (D-SPEED)
A check valve is a one way valve. It is normally used to bleed boost before it reaches the MAP sensor. A bypass valve is spring loaded and evacuates boost when you let off the throttle.
#3
Honda-Tech Member
Thread Starter
Join Date: May 2001
Location: Okayama, Japan
Posts: 889
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (ben@importparts.com)
sorry i did not mean bypass valve as in bov......
i meant like......what is the "missing link" product ?
i meant like......what is the "missing link" product ?
#6
Honda-Tech Member
Join Date: May 2001
Location: Tallahassee, FL, US
Posts: 7,190
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (D-SPEED)
When boost is applied to the check valve, it opens and the boost escapes to the atmosphere before the MAP sensor can read it. When the car is under vacuum, the check valve is closed(read one way valve) and allows the MAP sensor to read regular vacuum.
later,
Jared
later,
Jared
#7
New User
Join Date: Jun 2001
Location: San Diego, CA, USA
Posts: 85
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (Jared)
I've always wondered about that concept. If it's bleeding boost into the atmosphere so that boost won't reach the map sensor, isn't it kinda like a boost leak? Cause I know on an RX-7 if you have a boost leak, you're basically losing boost and won't make full boost, so in order to make full boost, basically your turbo has to work a little harder to make up for the leak?? I'm not sure, so please explain.
Trending Topics
#8
Honda-Tech Member
Join Date: May 2001
Location: Tallahassee, FL, US
Posts: 7,190
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (TurboLudeSi)
You are correct. It is a boost leak. I'm sure you could fix that by taking the outlets of the check valves, combining them, and routing it back into the manifold. However, it is a small boost leak, only what will flow through the check valves.
later,
Jared
later,
Jared
#9
Honda-Tech Member
Join Date: Oct 2000
Location: San Diego, CA, USA
Posts: 1,584
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (TurboLudeSi)
yeah basically a small leak but not a big deal. You can make an electronic check valve so to say. since the MAP sends a voltage to the computer that's dependent on the manifold pressure you simply make a circuit that doesnt allow the ecu to see anything more then 2.9v approximately. I dont really know all that much about electronics but G from the board is going to let me try one on my car that he made.
#10
Honda-Tech Member
Thread Starter
Join Date: May 2001
Location: Okayama, Japan
Posts: 889
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (TurboInteg95)
that seems like the simple solution.......why hasnt this been done before ? i hear alot of people say they dont like the check valves....
#11
New User
Join Date: Jun 2001
Location: San Diego, CA, USA
Posts: 85
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (TurboInteg95)
That is it, I'm going to make that electronic device that will regulate pass-through voltage from 0-2.9V. I didn't know it was simple as just the voltage. My major at UCSD is electrical engineering. That entire device is just capacitors, diodes, and BJT transistors!! I've made something like that already. That is it, time for some schematics!!!
#12
Honda-Tech Member
Join Date: Oct 2000
Location: San Diego, CA, USA
Posts: 1,584
Likes: 0
Received 0 Likes
on
0 Posts
Re: how do check valves work ? (TurboLudeSi)
you'll want to check your MAP voltage at atmospheric pressure first, they're all slightly different. for example mine was 2.9, G's was 2.82 or something like that. Just turn the car on without starting it and check the voltage that the MAP is giving out, should be high 2's.
Thread
Thread Starter
Forum
Replies
Last Post
filetofit
Forced Induction
7
01-30-2006 06:18 PM
crx1856
Forced Induction
2
05-19-2003 10:44 PM
technine
Forced Induction
11
08-08-2002 02:52 AM