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9-3 Sedan, Cabrio ('04+)/Combi & 9-3X Performance Mods & Tuning - ALL ENGINES Covers GENERAL Tuning & Performance modifications that are *non-engine specific* in nature

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  #1  
Old 9th September 2007
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Default Saab BOV ?

I'm looking to install a BOV on my saab 9-3 and was wondering which ones are good. i'm looking for one that just has a nice sqeak for a clan sound. and also i was wondering where to buy a block off plate and then the adapter to tap into the downpipe for install.

Thanks
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  #2  
Old 9th September 2007
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Last i heard you couldn't put a BOV on a 9-3, atleast in the US, only BPVs
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  #3  
Old 9th September 2007
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Why would you put a blow off valve on your downpipe..
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  #4  
Old 9th September 2007
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well the setup looks like the same when i had a srt-4 before i blew it up. you put a block off plate on where the stock bov is because any aftermarket one will never fit where it is and then tap into the downpipe. thats exactly how i did it before so thats y im saying
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  #5  
Old 9th September 2007
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Looks like another dude bought before doing his homework... The Trionic Engine management does not get along with BOV's...in the last couple of years only one guy has gotten one to work. And not on a US spec car.

Do a search on BOV and ByPass Valve...there is plenty to read.

And if you want to do any major engine Mods you'll finf your choices limited with a 93SS.

Oh, and last I heard, BOV's are installed way before the Downpipe,,,,,

Last edited by JonV; 9th September 2007 at 06:43 PM.
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  #6  
Old 9th September 2007
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well thanks for the info but i didn't buy the car to mod up and make a race car. thought it be cool to have a bov on the car. but anyways thanks for the info
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  #7  
Old 9th September 2007
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If your just looking for the Bypass valve sound, you've got a couple of Options...an aftermarket Drop In Air Filter (ITG,JR) or a High Flow Intake like BSR's Optiflow or Simota's Aeroform II have good results...IMO stay away from the K&N POS, you have to Mod it to keep from throwing CEL's.
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  #8  
Old 9th September 2007
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Quote:
Originally Posted by BlackedOutSaab
well the setup looks like the same when i had a srt-4 before i blew it up. you put a block off plate on where the stock bov is because any aftermarket one will never fit where it is and then tap into the downpipe. thats exactly how i did it before so thats y im saying
The SRT-4 blockoff plate goes on the turbo to IC pipe, on the cold side of the system

The downpipe is the part of the exhaust immediately after the turbo, so it has nothing to do with a BOV....

Also....

Trionic 7 and 8 are both air-mass metering engine management systems, so they won't work correctly if air escapes out of the system as with a BOV. You can upgrade your recirculating bypass valve but that won't do any good unless you upgrade a lot of other things first...
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  #9  
Old 9th September 2007
TopNach TopNach is offline
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just get an intake.. it sounds cooler and bov suck in out cars they dont even work.
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  #10  
Old 10th September 2007
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"...stay away from the K&N POS, you have to Mod it to keep from throwing CEL's."

Please explain - CELs? I put a K&N filter in, along with a cat-back and BSR PPC and have had no fault codes, etc.
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  #11  
Old 10th September 2007
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Quote:
Originally Posted by Bob Z.
Please explain - CELs? I put a K&N filter in, along with a cat-back and BSR PPC and have had no fault codes, etc.
K&N makes a large diameter intake kit, a drop-in filter, and other parts which can be cobbled together by a DIY'er.

Whether or not you get problems (CEL's in particular) has a lot to do with how you put K&N's intake parts on your Saab.

Messing with an intake on a MAF-metered car is like messing with your eyeglass prescription. You may like your friend's designer frames, but if you trade glasses you won't see as well, because everyone knows it's the lenses that are the most important part. You may see well enough to get by, but it won't be 20/20. And in a lot of cases your vision will simply be worse with the switch.

Your stock intake is similarly matched to your engine through something called a MAF transfer function. If you change the intake, you should change the MAF transfer function, which is software in the ECM. This service is not yet available for our cars. Whether or not you get a CEL with your intake mod has to do with how badly you screw up the fuel trim. Because of how precisely the stock intake is matched to the car, almost any intake mod can cause problems. Really it's just a matter of degree.

You can learn a lot about this fast. Just google "maf transfer function."
Here, I saved you the trouble:
http://www.google.com/search?hl=en&q...=Google+Search
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  #12  
Old 11th September 2007
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Quote:
Originally Posted by Bob Z.
"...stay away from the K&N POS, you have to Mod it to keep from throwing CEL's."

Please explain - CELs? I put a K&N filter in, along with a cat-back and BSR PPC and have had no fault codes, etc.
Did you use a Drop in or the 57i Kit......many folks have had to mod the intakes inner diameter on the 57...search K&N Diameter K&N CEL
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  #13  
Old 13th September 2007
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I have a droP-in K&N filter. No problems. Unless your refering to the Intake Kit K&N sells??
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  #14  
Old 14th September 2007
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yes the 57i or some bologna
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  #15  
Old 1st August 2008
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Default what does CEL's mean?

Quote:
Originally Posted by JonV
If your just looking for the Bypass valve sound, you've got a couple of Options...an aftermarket Drop In Air Filter (ITG,JR) or a High Flow Intake like BSR's Optiflow or Simota's Aeroform II have good results...IMO stay away from the K&N POS, you have to Mod it to keep from throwing CEL's.
Not sure what CEL means...
Please explain. thx
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  #16  
Old 1st August 2008
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Quote:
Originally Posted by SaabKing
Not sure what CEL means...
Please explain. thx
This is a really old thread... But CEL = Check Engine Light
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  #17  
Old 1st August 2008
corbett123 corbett123 is offline
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Quote:
Originally Posted by Frosty288
Why would you put a blow off valve on your downpipe..

didnt you get the bov working?
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  #18  
Old 1st August 2008
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Quote:
Originally Posted by mike saunders
The SRT-4 blockoff plate goes on the turbo to IC pipe, on the cold side of the system

The downpipe is the part of the exhaust immediately after the turbo, so it has nothing to do with a BOV....

Also....

Trionic 7 and 8 are both air-mass metering engine management systems, so they won't work correctly if air escapes out of the system as with a BOV. You can upgrade your recirculating bypass valve but that won't do any good unless you upgrade a lot of other things first...
BOV's are a good way to spit fire on Mass air metered cars with no catalytic converters... I know this from experiance!

(The Turbo X likes to pop occasionally on first-second shifts, just the way it came from factory, no flames tho I wager.)
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  #19  
Old 1st August 2008
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Quote:
Originally Posted by lmpreza
BOV's are a good way to spit fire on Mass air metered cars with no catalytic converters... I know this from experiance!

(The Turbo X likes to pop occasionally on first-second shifts, just the way it came from factory, no flames tho I wager.)
SRT4s dont use an MAF, thats why people can install BOVs on them no problem, however bov on a car with a MAF causes stalling and will eventually throw CEL. I was able to move the BOV onto the upper intercooler pipe, instead of the intake on my Evo with sucess and no stalling issues. But the only way to run like that properly and safely is with engine management software.
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  #20  
Old 2nd August 2008
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Default 9-3 aero with bov

sounds sweet, sombody got it to work! http://www.youtube.com/watch?v=GQHxliWoxGY
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