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Louder "blow-off" with T7 *video

6.4K views 14 replies 8 participants last post by  Turbo-Snaab  
#1 ·
I know at least a few people out there like to make their T7 turbos known and wish they could run a real blow-off valve like T5 cars. Messing around some has gotten me some real results: car performs well, T7 is happy (no CEL!), and a "blow-off" that is like an actual atmospheric valve.

Components:
-Taliaferro open air intake with huge K&N filter (from GenuineSaab of course)
-Forge Motorsport 007 piston diverter valve (also ordered from GenuineSaab)

The one difference: orienting the valve in the reverse of how Saab puts it from the factory. Technically Saab has the valve on there backwards to begin with (to hold more boost I have heard). Going opposite of the stock way actually seals better at idle and low throttle (since the bottom of the piston is actually against the pressurized air--in the stock position the pressurized air hits the piston sideways) and results in a louder release. Better for sound and technically performance too. NOTE: the pipes to the diverter valve don't lend themselves to this orientation as well, it is a tighter fit because the valve sticks out farther.

Picture of the setup:


I made a video of my car revving in the garage (you can hear it better). The video's main purpose was to showcase the Remus exhaust, but near the end I rev it hard twice and "blow-off" for the camera. I can make another video if people want that would be more focused on the intake.

 
#5 ·
dumb question (i haven't thought about the physics here), but can you do that with the stock bosch DV valve and get the same result? I too run with the Taliaferro intake and love in sound, just wish the "blow off" was a bit more "hurt that kid's ears in that civic i just passed" loud.
 
#6 ·
i get a nice sound with my hyperboost BPV as well..
the open air kit and cobra pipe and 21psi help with the loud BPV..

yurs was a little hard to hear but im guna try flipping mine around..
yurs has more of a whistle than mine does.. mines almost a loud short
woccuuushh
 
#8 ·
I don't see why you couldn't do it with any other valve. I'm not sure how well the stock valve would hold all the pressure now that it has to hold it all down, the Forge is adjustable, so this is not a problem. I will try to get a video under load, but that is hard to do with all the wind noise.....I'll see what I can do.
 
#15 ·
from the sound of it, turning it around like you did, makes it more of a Whistle sound, rather than the "KSSSH" sound wich is what i've been wanting all along! Once i get my car back, im going to have to try this!