Compressor surge? Flutterdump? ? ? ?
06-26-2010, 04:43 PM
#1
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Compressor surge? Flutterdump? ? ? ?
I have a ebay "greddy" Type RS BOV and I just had MS installed so with the IAT in, we took off the AFM and there was compressor surge. I adjusted the nut on the BOV and tried to loosen it as much as possible, no luck.
I then took out the BOV and took it apart and took off the inner spring and left the outer spring in. I then put it all back together. Now there's flutterdump. Went around the block multiple times adjusting the screw and ended up at it's softest point. Still flutterdump. Like this:
but the delay is not as long.
I notice it only happening at lower RPMs, while the BOV make a "pew" sound. At higher rpm and when boost is around 6psi and up it makes a loud WHOOOSH sound, all bov no surge/flutter (sounds almost identical to the video around 0:50 sec)
My question is do I need a bigger/stiffer spring or smaller/softer?
I have yet to try to "inner spring" which is smaller, but just thought I'd ask anyways.
Any input?
I then took out the BOV and took it apart and took off the inner spring and left the outer spring in. I then put it all back together. Now there's flutterdump. Went around the block multiple times adjusting the screw and ended up at it's softest point. Still flutterdump. Like this:
but the delay is not as long.
I notice it only happening at lower RPMs, while the BOV make a "pew" sound. At higher rpm and when boost is around 6psi and up it makes a loud WHOOOSH sound, all bov no surge/flutter (sounds almost identical to the video around 0:50 sec)
My question is do I need a bigger/stiffer spring or smaller/softer?
I have yet to try to "inner spring" which is smaller, but just thought I'd ask anyways.
Any input?
Last edited by caideN; 06-26-2010 at 07:19 PM.
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06-27-2010, 01:53 PM
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"Synapse" is well known for making up marketing crap for their Chinese built **** sold as an answer to a problem that no one has.
Its also really easy to put a lighter spring in and have the valve open faster...and in vacuum to suck in dust.
Its also really easy to put a lighter spring in and have the valve open faster...and in vacuum to suck in dust.
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