Can you put a bov on a 951??
05-16-2002, 04:28 AM
#1
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Can you put a bov on a 951??
This may be a dumb wuestion, cause I dont know about the 951 engine, but does it come with a BOV, or a diverter valve. I guess what i'm asking is is it a closed loop or open loop system???
I want that psssssst sound, but i'm not sure if I can put one on it.
I want that psssssst sound, but i'm not sure if I can put one on it.
05-16-2002, 04:45 AM
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I'm not quite sure what you mean by open or closed loop, but yes, the 951 comes qith a bov from factory. If you look at the front right corner of the engine bay, it is that small black cylinder thing with a small vacuum hose on top.
The reason you don't hear the pssssst-sound is because it vents the air back to the turbo intake instead of straight to the atmosphere.
The reason you don't hear the pssssst-sound is because it vents the air back to the turbo intake instead of straight to the atmosphere.
05-16-2002, 09:53 AM
#4
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[quote]Originally posted by TurboMan:
<strong>The reason you don't hear the pssssst-sound is because it vents the air back to the turbo intake instead of straight to the atmosphere.</strong><hr></blockquote>
That design is called closed loop.
<strong>The reason you don't hear the pssssst-sound is because it vents the air back to the turbo intake instead of straight to the atmosphere.</strong><hr></blockquote>
That design is called closed loop.
05-16-2002, 10:45 AM
#5
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For "rice-racers" only? Really? I guess I've joined their ranks, as my compresor bypass/BOV vents to the atmoshpere and sounds BAD-@SS too! Si, you'd hear it (and agree that it's bad-@ss) if my car wasn't flying by you so fast. 
[quote] I want that psssssst sound, but i'm not sure if I can put one on it. <hr></blockquote>
You can if you go to a MAP based engine management system, but not with your stock efi.
[quote] I want that psssssst sound, but i'm not sure if I can put one on it. <hr></blockquote>
You can if you go to a MAP based engine management system, but not with your stock efi.
05-16-2002, 12:22 PM
#6
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[quote]Originally posted by si:
<strong>that psst blow-off sound is for rice-racers ONLY, you DONT want one.</strong><hr></blockquote>
I must be pretty rice too, along with the WRC rally cars =).
Not sure if there's really much advantages to blowing off into the atmosphere vs routing back into the system, but for MAP sensor'd cars, the BOV/Cycling Valve sits in front of the MAP sensor so the air isn't measured yet, and you can vent it anywhere you please.
I know when I upgraded from the cycling valve to a BOV, the boost kicked in much harder.
<strong>that psst blow-off sound is for rice-racers ONLY, you DONT want one.</strong><hr></blockquote>
I must be pretty rice too, along with the WRC rally cars =).
Not sure if there's really much advantages to blowing off into the atmosphere vs routing back into the system, but for MAP sensor'd cars, the BOV/Cycling Valve sits in front of the MAP sensor so the air isn't measured yet, and you can vent it anywhere you please.
I know when I upgraded from the cycling valve to a BOV, the boost kicked in much harder.
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05-16-2002, 12:53 PM
#8
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I have the Turbonetics Monster Blow off running back into the MAF and You can hear this baby talk.
Not rice in my book when it is a working piece.
Now if you put on one of those electronic sound devices to make someone believe you are turbocharged then that's rice.
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
Not rice in my book when it is a working piece.
Now if you put on one of those electronic sound devices to make someone believe you are turbocharged then that's rice.
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
05-16-2002, 01:57 PM
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[quote]Originally posted by DasWeis951:
<strong>how do I know if its a MAP system? did certain year 951 come with non MAP sensors?
I really wanna put one on, yea it does sound bad ****....
its a 87</strong><hr></blockquote>
every 951 came with a AFM, not a MAP. If you changed to a MAP, then you would be able to get that psssst sound.
<strong>how do I know if its a MAP system? did certain year 951 come with non MAP sensors?
I really wanna put one on, yea it does sound bad ****....
its a 87</strong><hr></blockquote>
every 951 came with a AFM, not a MAP. If you changed to a MAP, then you would be able to get that psssst sound.
05-16-2002, 04:34 PM
#11
Nordschleife Master
[quote]Originally posted by Russ Murphy:
<strong>You can if you go to a MAP based engine management system, but not with your stock efi.</strong><hr></blockquote>
Why can't you Blow into the atmo. with a unit that has a stiffer spring?
As long as you aren't leaking, right? (so there is no "counted" flow leaking off)
<strong>You can if you go to a MAP based engine management system, but not with your stock efi.</strong><hr></blockquote>
Why can't you Blow into the atmo. with a unit that has a stiffer spring?
As long as you aren't leaking, right? (so there is no "counted" flow leaking off)
05-16-2002, 06:35 PM
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[quote]Originally posted by DasWeis951:
<strong>ok so ow do I change it to map??</strong><hr></blockquote>
<a href="http://www.sdsefi.com/" target="_blank">SDS EFi</a>
<strong>ok so ow do I change it to map??</strong><hr></blockquote>
<a href="http://www.sdsefi.com/" target="_blank">SDS EFi</a>
05-17-2002, 01:36 AM
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[quote]Originally posted by Luke:
<strong>
Why can't you Blow into the atmo. with a unit that has a stiffer spring?
As long as you aren't leaking, right? (so there is no "counted" flow leaking off)</strong><hr></blockquote>
If you vent to atmosphere you are leaking, since the BOV (recirculation in this case) is after the meter. It's all 'counted flow' at that point, so you'll end up with a very over rich mixture between shifts (depending on the amount of boost that was being generated). That will only hurt performance and engine response between shifts.
<strong>
Why can't you Blow into the atmo. with a unit that has a stiffer spring?
As long as you aren't leaking, right? (so there is no "counted" flow leaking off)</strong><hr></blockquote>If you vent to atmosphere you are leaking, since the BOV (recirculation in this case) is after the meter. It's all 'counted flow' at that point, so you'll end up with a very over rich mixture between shifts (depending on the amount of boost that was being generated). That will only hurt performance and engine response between shifts.