87 T2 BOV need advice
#1
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87 T2 BOV need advice
I have a '87 Turbo II with a street ported motor and full T4 turbo upgrade.. Im using a Greddy Type R BOV but im not sure what spring is in it. I currentley have the BOV releasing back into the intake system, and of course I want to release into the open air... Does anyone know if the Greddy STIFF spring will allow me to do so?
#3
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The spring does not have anything to do with where the BOV dumps to. I have the same BOV on my car and it vents right out into the atmosphere.
I get some compressor surge or backturbine but that keeps all the little old ladys out of the way......hehehe
I get some compressor surge or backturbine but that keeps all the little old ladys out of the way......hehehe
#5
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That "stiff" GReddy Type-R BOV spring is sooo stiff that you need significant boost pressure to crack the valve open.  Even with the vacuum pull on the diaphram, it still won't open.  Yes, you are right about vacuum pulling the BOV open, but in this case the stiff spring holds it closed unless running significant boost...
-Ted
-Ted
#6
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Originally posted by RETed
Sure...
Do you hear compressor surge?  Those things don't usually like to open up until you start hitting 20psi of boost!
-Ted
Sure...
Do you hear compressor surge?  Those things don't usually like to open up until you start hitting 20psi of boost!
-Ted
#7
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Originally posted by turbo dan
Just curious, what does compressor surge sound like?
Just curious, what does compressor surge sound like?
It sounds like a fluttering bird...
Ever watch any WRC races?  They run no BOV, and it's all compressor surge.
-Ted
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#11
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Originally posted by Ranzo
The spring does not have anything to do with where the BOV dumps to. I have the same BOV on my car and it vents right out into the atmosphere.
I get some compressor surge or backturbine but that keeps all the little old ladys out of the way......hehehe
The spring does not have anything to do with where the BOV dumps to. I have the same BOV on my car and it vents right out into the atmosphere.
I get some compressor surge or backturbine but that keeps all the little old ladys out of the way......hehehe
#12
Senior Member
Im sure its not the best thing for the turbine but what other choice do I have, The type S blowoffs are too small for a large turbine and I think they blow off too much besides it would look dumb to have a big turbine and intercooler piping with that little BOV mounted in there....
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