Drivetrain Recirculation (DV/BOV) valve.
#51
I don't have tools here, i'll do it tomorrow. I know what you are talking about though and can see how it probably leaks air on all them. Just not sure if it's conical shape creates a seal when there is heat and pressure applied to it.
#52
#53
No still in vacuum but it is still higher than stock 1.5-2 psi closer to 0. When I get on the throttle it is about 2PSI higher than the stock valve.
#54
http://www.waymotorworks.com/forge-blow-off-valve.html
Any one had any experience with it?
#56
Right now the engine is too hot, but I'm beginning to think that I'm happy with the way it is working now I don't care to take it apart.
If you don't hear back from Mike for awhile, I'll go ahead and maybe pull it and check for the air loss, but as I say I'm both happy and reluctant at the same time. Good luck Big.
If you don't hear back from Mike for awhile, I'll go ahead and maybe pull it and check for the air loss, but as I say I'm both happy and reluctant at the same time. Good luck Big.
#57
Thanks bud I just want to justify me putting it back on because the lack of diaphram will make the plunging action a million times quicker and smoother.
Right now the engine is too hot, but I'm beginning to think that I'm happy with the way it is working now I don't care to take it apart.
If you don't hear back from Mike for awhile, I'll go ahead and maybe pull it and check for the air loss, but as I say I'm both happy and reluctant at the same time. Good luck Big.
If you don't hear back from Mike for awhile, I'll go ahead and maybe pull it and check for the air loss, but as I say I'm both happy and reluctant at the same time. Good luck Big.
#60
C'mon guys think about it logically, there is no way it can provide an air tight seal, and no amount of heat will do this, or it will have an interference resistance on the piston plunger, and slow even maybe stop it's action!
The reason quite a few, lets discuss BMW Mini here not VAG'S, are saying it's an improvement is quite simply, they will be feeling the smooth action of the valve piston VS the resistance of the rubber diaphragm, it's also quieter due to it's air control design.
When you install this valve on a stock engine with stock boost levels, there is a definite slowing of the spool time of the turbo (i've tested and measured this) however as it is so slight many owners may not notice this, as they will be feeling the smooth action of the valve piston.
Now when installed on an engine with increased boost pressure, (tune etc etc) the effects of the smooth operation are enhanced, and although people are impressed, it's only the difference between a resistance rubber diaphragm VS a free moving piston!
Now matter how you look at it, it will never ever seal as good as the stock factory rubber diaphragm recirculation valve, and when you fit a revised rated spring to your stock rubber diaphragm recirculation valve, this will give you a faster spool time, than the VAG valve!
The reason quite a few, lets discuss BMW Mini here not VAG'S, are saying it's an improvement is quite simply, they will be feeling the smooth action of the valve piston VS the resistance of the rubber diaphragm, it's also quieter due to it's air control design.
When you install this valve on a stock engine with stock boost levels, there is a definite slowing of the spool time of the turbo (i've tested and measured this) however as it is so slight many owners may not notice this, as they will be feeling the smooth action of the valve piston.
Now when installed on an engine with increased boost pressure, (tune etc etc) the effects of the smooth operation are enhanced, and although people are impressed, it's only the difference between a resistance rubber diaphragm VS a free moving piston!
Now matter how you look at it, it will never ever seal as good as the stock factory rubber diaphragm recirculation valve, and when you fit a revised rated spring to your stock rubber diaphragm recirculation valve, this will give you a faster spool time, than the VAG valve!
#61
Dont forget to add that it is already started the purge process as it is not a burst of flow, compared to a slight flow going to a major flow... if that makes sense.
#62
#63
Ok so I pulled my DV back out and inspected the VAG internals again. Something I did not catch before was that the piston is tapered. So when it is forced shut the conical ring does allow for a good seal. I even blew air threw the piston to check.
However since it does get pushed in some what when it is installed the ring sits higher on this tapper and probably does not seal. Again I tested this too with it pushed in similar to it being installed. It blows air past the seal.
My guess is that the VW and Audi housing this VAG DV is intended for are slightly deeper. It would probably seal with a spacer added to give the MINI turbo housing depth, but we still don't have definitive proof the piston will seal against the housing then too.
Lame now I get to listen to the stock one again. Thanks for bursting my bubble.
However since it does get pushed in some what when it is installed the ring sits higher on this tapper and probably does not seal. Again I tested this too with it pushed in similar to it being installed. It blows air past the seal.
My guess is that the VW and Audi housing this VAG DV is intended for are slightly deeper. It would probably seal with a spacer added to give the MINI turbo housing depth, but we still don't have definitive proof the piston will seal against the housing then too.
Lame now I get to listen to the stock one again. Thanks for bursting my bubble.
#64
Humm, took the MINI out for a little spin, a couple of hours ago, for a quick errand. The beastie wasn't warmed up to operating temp yet, maybe about 190 deg. water temp. Started a good pull in third, and the cel lamp on the tach came on, yellow, half engine. Got home and read the codes. P303e, and P2885. What I could find on P2885 was 'boost pressure deviation'. Sticky new VAG valve, air loss? Couldn't find anything on P303e.
I'll try this again later fully warmed up, weather permitting, supposed to snow again, bugger .
I'll try this again later fully warmed up, weather permitting, supposed to snow again, bugger .
#65
Humm, took the MINI out for a little spin, a couple of hours ago, for a quick errand. The beastie wasn't warmed up to operating temp yet, maybe about 190 deg. water temp. Started a good pull in third, and the cel lamp on the tach came on, yellow, half engine. Got home and read the codes. P303e, and P2885. What I could find on P2885 was 'boost pressure deviation'. Sticky new VAG valve, air loss? Couldn't find anything on P303e.
I'll try this again later fully warmed up, weather permitting, supposed to snow again, bugger .
I'll try this again later fully warmed up, weather permitting, supposed to snow again, bugger .
#67
Here you go:
http://www.clubmanregister.co.uk/vie...hp?f=14&t=1007
#70
#72
im still a little confused?! can someone summerize what just happened? should i replace my spring? change the whole thing to the 710d? block it off altogether? i like to feel a nice strong pull from the turbo while being my DD. Will this make anything better for the motor itself? heat sink or what nots?
#73
There is no harm done in switching this valve out... read through and determine what you are looking for
im still a little confused?! can someone summerize what just happened? should i replace my spring? change the whole thing to the 710d? block it off altogether? i like to feel a nice strong pull from the turbo while being my DD. Will this make anything better for the motor itself? heat sink or what nots?
#75
if its "full engine power not available" (half shaded engine light)its tripping the check sum between the sensors... which auto corrects itself. I had this when i was running the valve closed, when i scanned my car with the bmw/mini dealership icid(factory scan tool)... i have my connections the code never appeared in the logs, which are only cleared by an icid type tool.