Bypass valve

Jcg_3v94

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How can i properly test my bypass valve?


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Jcg_3v94

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Should it be under vacuum while idling?


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Jcg_3v94

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I always just pull the vacuum line and see if the the valve closes.

Im just trying to eliminate reasons on my im pushing only 6 psi when i should be pushing 9psi


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07 Boss

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What kind of SC and what size pulley? Any other mods to the motor? I'm supposed to run 11-12 psi but run about 10.5 due to mild cams and headers.
 

Jcg_3v94

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What kind of SC and what size pulley? Any other mods to the motor? I'm supposed to run 11-12 psi but run about 10.5 due to mild cams and headers.

3.4 pulley, saleen supercharger. Only 37lb injectors and saleen cold air intake on motor.


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07 Boss

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Im just trying to eliminate reasons on my im pushing only 6 psi when i should be pushing 9psi


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Did it used to run 9 psi? How long ago? Did it happen all of a sudden or over a period of time?
 

Jcg_3v94

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Did it used to run 9 psi? How long ago? Did it happen all of a sudden or over a period of time?

No went from stock pulley to 3.6 to 3.4. Had it tuned and we installed a mechanical boost gauge and only read 6psi had blower services in 2018. Car is all except 3.4 pulley saleen air intake box and injectors


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07 Boss

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How much boost did it run with the 3.6 pulley? Might be belt slip, what kind of belt tensioner do you run?
 

Jcg_3v94

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How much boost did it run with the 3.6 pulley? Might be belt slip, what kind of belt tensioner do you run?

Never checked to be honest. Just the oem belt tensioner.


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