BOV leaking A LOT at idle
#1
in slow, out fast!
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BOV leaking A LOT at idle
i never noticed it before... but my blitz bov (older one) was leaking a lot at idle... i mean i could feel a lot of air (A LOT) coming from the bov(I.E. blowing out of the bov) and hitting my hand at idle. i didn't think this was good, so i tightened down the adjust screw till where no air is leaking, but now under boost it sounds like i have it too tight... doesn't have a nice clean blow off... sounds like i am getting compressor surge. so whats the deal... should i loosen it so it blows off cleanly but leaks at blows air at idle, or should i leave it as it is now, no blowing at idle, but getting compessor surge.
john
ps, i'll have to check again, but i am pretty sure that the bov shuts close as soon as i start building boost... so i am not sucking in any, just losing some at idle....
john
ps, i'll have to check again, but i am pretty sure that the bov shuts close as soon as i start building boost... so i am not sucking in any, just losing some at idle....
#2
NorCal 7's Co-founder
I'd loosen it back up and quick! If you keep it tight and keep getting compressor surge you're gonna be replacing turbos!! If it's shutting as soon as you start building boost then I don't see any big disadvantage. You're not losing any performance since the problem only exists at idle. But the best thing to do is just buy a new BOV. Until then though, please please please loosen that spring back up before you burn up your turbo. Best of luck to you. Laterz.
Zach
Zach
#3
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the whole principle of a BOV is that it is open when off boost to prevent compressor surge. So, yes, at idle there is no boost and yes, the BOV is open. My tial is open at idle as well. DON'T get a new BOV, it is functioning correctly.
#6
in slow, out fast!
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lol
learn something new everyday!
oh yeah skunks...did you ever check the thread where you make carbon fiber bumber guards????there is a bunch of recent post asking about it..
learn something new everyday!
oh yeah skunks...did you ever check the thread where you make carbon fiber bumber guards????there is a bunch of recent post asking about it..
#7
NorCal 7's Co-founder
Wow, I can't believe that I missed that one. At least my brain was working enough today to tell him to loosen it back up! Anyone wanna send me a turbo 7 quick?? I haven't seen either of mine in like 2 months!!!!! Living on an island sucks sometimes.
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#8
Rotary Freak
The trick is to have it set so that it is closed under 16-18 in vacuum and open when the engine pulls high vacuum when the throttle is shut at high rpm. It should open at 20 - 24 in vacuum .The stock ones open at 4 in vacuum, if you take them apart and stack washers in the top to preload the spring, they open at 8 in vacuum . So the search is on for the correct spring .Keeping it closed at idle will help the low end responce alittle for the cost of a small spring .
#9
5yr member, joined 2001
On page F-88 of the FSM in the test procedure it says:
"3. Apply approx 26.7 kPa {200 mmHg, 7.87 inHg} to Port A and verify that air flows between B and C."
Anyways, I didn't even know you could adjust those things.
"3. Apply approx 26.7 kPa {200 mmHg, 7.87 inHg} to Port A and verify that air flows between B and C."
Anyways, I didn't even know you could adjust those things.
#10
fart on a friends head!!!
you have to have a careful set of hands and an ingenious head on your shoulders. youre not supposed to be able to adjust them, but if you use your noggin youll be able to.
paul
anyways. . . jonski, why havent you swapped over to a manual tranny yet?
paul
anyways. . . jonski, why havent you swapped over to a manual tranny yet?
#11
5yr member, joined 2001
Originally posted by rotorbrain
you have to have a careful set of hands and an ingenious head on your shoulders. youre not supposed to be able to adjust them, but if you use your noggin youll be able to.
paul
anyways. . . jonski, why havent you swapped over to a manual tranny yet?
you have to have a careful set of hands and an ingenious head on your shoulders. youre not supposed to be able to adjust them, but if you use your noggin youll be able to.
paul
anyways. . . jonski, why havent you swapped over to a manual tranny yet?
I can't do a 5-speed swap if I can't locate a 5-speed FD that's being parted out.
#13
fart on a friends head!!!
isuposs, i am talking about stock ones. you have to pull out the surgery kit for this one.
jonski, no they dont. its very careful and well planned. . . and youve had that car forever!!!! NO EXCUSES. HAHAHA. ive seen plenty of them parted out. one word. . . junkyard.
im only playin witcha, but i will say this. the rx7 isnt really noticed till you drive it in 5 speed configuration. its amazing what this thing does with a manual.
paul
jonski, no they dont. its very careful and well planned. . . and youve had that car forever!!!! NO EXCUSES. HAHAHA. ive seen plenty of them parted out. one word. . . junkyard.
im only playin witcha, but i will say this. the rx7 isnt really noticed till you drive it in 5 speed configuration. its amazing what this thing does with a manual.
paul
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