Hi,
While cleaning the induction system yesterday, I noticed that the BOV pipe that connects to the Y pipe had been blocked off by a jubilee clip and a bolt. This has caused turbo surge and I can hear the chattering sound while dumping at low rpm. FYI, I just bought the car 1 week ago.
Now the question is, should I connect back a bov instead of letting it blocked? I knew that compressor surge is no good for turbo, or is it doesn\'t matter on a sequential turbo system like the FD?
Your help is so much appreciated.
Regards,
Justin
Plumb it back in else the turbo will be utter wrecked if its not wrecked already, the previous owner of my car disconnected some vac lines so that the BOV only opened every now and then and I had to have the whole turbo rebuilt as the seals and bearings were completly shot.
Quote from: Pumba_GT;670917Hi,
While cleaning the induction system yesterday, I noticed that the BOV pipe that connects to the Y pipe had been blocked off by a jubilee clip and a bolt. This has caused turbo surge and I can hear the chattering sound while dumping at low rpm. FYI, I just bought the car 1 week ago.
Now the question is, should I connect back a bov instead of letting it blocked? I knew that compressor surge is no good for turbo, or is it doesn\'t matter on a sequential turbo system like the FD?
Your help is so much appreciated.
Regards,
Justin
this isn\'t surge, surge is when the turbo is pushing too much air for the rest of the system and boost escapes back through the compressor. this will usually only happen on WOT/full boost.
it\'s up to you really, i\'d reconnect it simply because Mazda designed the system to work with one. if it was a nice chunky single turbo, however, no BOV is the way to go so you get that cool chatter sound :cool
you are correct, it\'s actualy turbo stall!!
I get this even with a BOV fitted, but only at very very small + boost pressurs, basicaly not enough pressure difference to activate the valve. But yes, I would put one back as you dont want to have this happening when the turbo is pulling 40k rpm!
Jono
As mentioned - it\'s compressor stall, not surge :) (And it\'s deffo not wastegate chatter as people insist on calling it!)
As for the damage it does to your tubo - that\'s matter that\'s debated time and time again. I\'ve done about 50k on 2 seperate T28\'s with no issues whatsoever. here are billions of threads about it.
if
Quote from: m1tchthe turbo will be utter wrecked if its not wrecked already
why do not all turbo cars have them as standard? ;)
No harm at all in putting one back on though :)
Ahh...this one again...still cant decide which side I\'m on! lol
I\'ve got the BOV in....whistles quite a biton part throttle which is annoying...is that because its leaking, or the after market filters not quietening down a standard noise!?
Quote from: SiH;671008As mentioned - it\'s compressor stall, not surge :) (And it\'s deffo not wastegate chatter as people insist on calling it!)
As for the damage it does to your tubo - that\'s matter that\'s debated time and time again. I\'ve done about 50k on 2 seperate T28\'s with no issues whatsoever. here are billions of threads about it.
if
why do not all turbo cars have them as standard? ;)
No harm at all in putting one back on though :)
As far as I know all turbo cars have a BOV of some sort, it might be a recirc but it will be installed to protect the turbo.
my megan is a turbo, not noticed a recirc or bov on that.
tho it is a low pressure turbo and just found out its a kkk turbo :p
Quote from: m1tch;671034As far as I know all turbo cars have a BOV of some sort, it might be a recirc but it will be installed to protect the turbo.
im pretty sure it was saab that introduced valves to cars as people were taking the turbo cars back saying they were making funny noises and broken without a valve on it...
on my 200 i ran a bov for about 50 miles, the rest was naked and i loved the sound... it didnt kill the turbo or wreck it, also on 5gtt\'s etc ran no bov
Quote from: m1tch;671034As far as I know all turbo cars have a BOV of some sort, it might be a recirc but it will be installed to protect the turbo.
Starter for 10: S13 200SX.
not all cars have bovs mitch i can only think of a few at this point tho r5 gt turbo porsche 924turbo s13 with ca18det engine
add metro turbo to that list, i didn\'t run one on my mini turbo, that was fine. and haven\'t run one on my rx for a while. no problems as of yet.
I ran for 18months with no bov as i prefered it that way, caused me zero problems whatsoever and still running strong on the same twins
Quote from: CharlieP;671010Ahh...this one again...still cant decide which side I\'m on! lol
I\'ve got the BOV in....whistles quite a biton part throttle which is annoying...is that because its leaking, or the after market filters not quietening down a standard noise!?
have you got a stock one on the car charlie? if you have then yes, they only fully shut on boost for some reason as mine did exactly the same! eather that or yours & mine were fooked!!
Jono
Quote from: Jono FD3;671156have you got a stock one on the car charlie? if you have then yes, they only fully shut on boost for some reason as mine did exactly the same! eather that or yours & mine were fooked!!
Jono
thats partially the reason i blocked off mine, its just really annoying when i\'m trying to drive lightly and get a stupid woosh! i\'ve just got to sort the air pump now. thinking of running a 3m hose right to the back of the car, and put it in a box filled with foam! doesn\'t help that its got a wee filter on the end, even tried the small hole but it just changes the noise! anyway bit off topic:Hammer
I understand the "myth" about the potential damage to turbo without a bov. I bought the rex without the bov, so I am looking to put back with a standard bov.
If anyone has one knocking about, please let me know how much plus postage.
Thanks.
I sold my Bov on my single setup, i just couldnt hear it over the chatter so got rid after reading big tubs can take some stick and didnt need a bov. you would hope a tub could take some pressure due to the costing of them
Quote from: steveobennet;671196thats partially the reason i blocked off mine, its just really annoying when i\'m trying to drive lightly and get a stupid woosh! i\'ve just got to sort the air pump now. thinking of running a 3m hose right to the back of the car, and put it in a box filled with foam! doesn\'t help that its got a wee filter on the end, even tried the small hole but it just changes the noise! anyway bit off topic:Hammer
Yes, got the standard recirc valve, used to have a Blitz, but thought I\'d get rid of the tcsshh by putting back the recirc....but no luck, and gained the stupid whistle noise. Anyway, got a SARD on the way, so will put that on to get rid of the leaking whistle, then quieten down the tschh:Thumbsup!
you should be able to get a recirc kit for that?? basicaly pipe it back to the air filters rether than to atmosphear... this will quieten it down a fair bit ;)
Quote from: Pumba_GT;671198I understand the "myth" about the potential damage to turbo without a bov. I bought the rex without the bov, so I am looking to put back with a standard bov.
If anyone has one knocking about, please let me know how much plus postage.
Thanks.
You can have mine for £20 delivered ill even leave the recirc part on for you to plumb it back recirculation stylee.
Works perfectly in great condition.