Diverter valves: Maintenance or Performance ??
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Diverter valves: Maintenance or Performance ??
Diverter Valves are sold as Part of Evoms's Stage 1 +
On their website it states: "Our valves will restore lost power and will hold more boost pressure than the stock units for added performance. In addition, they recover quicker than the OEM valves which allows better spool up after shifts."
Link
and: "The stock valves are only able to hold up to the stock .7 BAR of boost. Once the boost is increased to 1.0 BAR, it is a necessity to change the stock valves to achieve the stated power gains."
Link
Is this all accurate ?
On their website it states: "Our valves will restore lost power and will hold more boost pressure than the stock units for added performance. In addition, they recover quicker than the OEM valves which allows better spool up after shifts."
Link
and: "The stock valves are only able to hold up to the stock .7 BAR of boost. Once the boost is increased to 1.0 BAR, it is a necessity to change the stock valves to achieve the stated power gains."
Link
Is this all accurate ?
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The stock valves contain a rubber diaphragm that tends to rip. The result is you lose significant boost due to the leak. Porsche, VW, and audi has used this technology since the early 80's and for some reason are still using it (though an updated valve that fails the same way). Typically by 30k miles on turbo applications from the aformentioned manufactures, we see the valves have failed. Also when you run higher boost, it puts more strain on the valve and it will fail.
The billet valves on the other hand do not fail because they have an aluminum plunger/diaphragm that will not rip or tear like the stock units.
They can take much higher boost. Replace the valves with billet units, and don't worry about it anymore
The billet valves on the other hand do not fail because they have an aluminum plunger/diaphragm that will not rip or tear like the stock units.
They can take much higher boost. Replace the valves with billet units, and don't worry about it anymore
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Originally Posted by IAPorscheDoc
The stock valves contain a rubber diaphragm that tends to rip. The result is you lose significant boost due to the leak. Porsche, VW, and audi has used this technology since the early 80's and for some reason are still using it (though an updated valve that fails the same way). Typically by 30k miles on turbo applications from the aformentioned manufactures, we see the valves have failed. Also when you run higher boost, it puts more strain on the valve and it will fail.
The billet valves on the other hand do not fail because they have an aluminum plunger/diaphragm that will not rip or tear like the stock units.
They can take much higher boost. Replace the valves with billet units, and don't worry about it anymore
The billet valves on the other hand do not fail because they have an aluminum plunger/diaphragm that will not rip or tear like the stock units.
They can take much higher boost. Replace the valves with billet units, and don't worry about it anymore
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Here is a picture of the billet valve. You can see the aluminum plunger/diaphragm. It is a very well made piece.
And here is a picture of the stock valves. I cut the top off to show the innerds. The red arrow points to the rubber diaphragm that will split and fail, therefore the pressure can not push the plunger up against the pressure of the spring, resulting in lost function. Along with the rubber diaphragm, you can notice the plastic plunger that rides on it.
And here is a picture of the stock valves. I cut the top off to show the innerds. The red arrow points to the rubber diaphragm that will split and fail, therefore the pressure can not push the plunger up against the pressure of the spring, resulting in lost function. Along with the rubber diaphragm, you can notice the plastic plunger that rides on it.
Last edited by IAPorscheDoc; Feb 28, 2007 at 08:37 AM.
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Originally Posted by wross996TT
and which would you recommend?Dave
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Originally Posted by 996TTDave
Thanks and which would you recommend?
Dave
and which would you recommend?Dave
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One more time, is there an easy way to tell if these have failed? I have 27K on mine I hear 30k is around where they fail...
I would think it would hold less boost, so maybe it wouldnt go to .7 bar?
Also, will the aftermarket ones void a warranty?
I would think it would hold less boost, so maybe it wouldnt go to .7 bar?
Also, will the aftermarket ones void a warranty?