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08-16-2009, 01:02 PM | #1 |
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Intakes Do Not Cause A Cel, Bovs Dont Make You Run Rich
In 90% of cases, the above statements are true. Hopefully the fact that its in caps and is the thread title will get this noticed.
If your intake gives you a CEL, its either a poorly designed or BIG MAF intake (that you havent tuned for), or you did something wrong during the install. A bov, will only give you a TINY temporary rich spot WHEN IT VENTS, it will not cause a constant rich condition, because when its closed, its closed. Just like stock. (unless it leaks, which wont cause you to run rich either) The problems with intakes have largely been eliminated over the past several years, and BOVs, well, they never made you "run rich" to begin with. Both are myths and misconceptions that for some reason after multiple FAQs and threads explaining things in detail, just wont go away.
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08-16-2009, 02:02 PM | #2 |
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Air fuel ratio charts during bpv full-to-off throttle excursions?
Air fuel ratio charts during bov full-to-off throttle excursions? thanks.....waiting.....I have no opinion either way (since BOV's cost money) but would like to see data so we can judge based on something real. jack |
08-16-2009, 02:05 PM | #3 |
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If I get an untuned intake that causes a lean condition and then a bov to make me run rich will it even out?
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08-16-2009, 02:07 PM | #4 |
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This calls for another video.
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08-16-2009, 02:15 PM | #5 |
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08-16-2009, 04:28 PM | #6 |
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08-16-2009, 04:34 PM | #7 |
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What BOV can make the best Pshshshshshhhhhhhhhh noise?
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08-16-2009, 04:53 PM | #8 | |
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Quote:
Datalogs It goes about .2 to .5 rich for 3 lines or less. And the log is sampling I want to say 4 times a second. So its under a second. For day to day driving, even hard driving, it makes no difference. Around a race track, only those with enough skill for there to be no other problems will see a difference. On the drag strip, again, 90% of people arent fast enough (driving wise) for it to matter. |
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08-16-2009, 04:53 PM | #9 |
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08-16-2009, 06:06 PM | #12 |
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so Defiant, are you saying that really there is no harm running a bov?
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08-16-2009, 06:26 PM | #13 |
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how can i get the turbo sound in my 2.5i? can i weld a BOV on my exhaust?
lolwut |
08-16-2009, 07:03 PM | #14 |
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DefiantAutospeed has made a defiant thread
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08-17-2009, 01:11 AM | #15 |
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Defiant, what you say about intakes may be true for turbo cars, I have no idea.
However, there are a number of intakes available for the NA cars that will screw over the MAF badly enough to peg the A/F Learning and throw a CEL. There's a bigger number of intakes that will only cause about a 15% error, which isn't quite enough to trigger a CEL but is enough to cause other problems. An intake, any intake, without tuning is NOT a safe thing to do on a MAF-based NA. |
08-17-2009, 01:27 AM | #16 |
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08-17-2009, 01:27 AM | #17 |
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08-17-2009, 01:28 AM | #18 | |
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If it's functioning properly, then there will be no harm. I speak for Dave, because he pays me to do so. He doesn't yet know that he pays me for such assistance, but he will when he gets the bill.... |
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08-17-2009, 02:08 PM | #19 | |
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08-17-2009, 02:16 PM | #20 |
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