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  5. Q Blow-off Valves

Q Blow-off Valve Springs

turbos Tial Q Blow-off Valve

Springs for Q Blow-off Valves
Part Number ENGINE VACUUM READING ** Use Spring Color
in/Hg Bars p.s.i. in/Hg Bars p.s.i.
722781-0007 8 - 11 0.3 - 0.4 3.9 - 5.4 12 0.4 6 Black
722781-0009 12 - 15 0.4 - 0.5 5.9 - 7.4 16 0.5 8 White
722781-0011 16 - 19 0.5 - 0.6 7.9 - 9.3 20 0.6 10 Un-painted
722781-0012 20 - 21 0.6 - 0.7 9.8 - 10.3 22 0.7 11 Pink
Not yet released 22 - 23 0.7 - 0.8 10.8 - 11.3 24 0.8 12 ???
NOTES
  • ** Measure engine vacuum at idle ( Engine at operating temperature ).
  • The springs are the same and interchangeable between BV50 and Q BOV but they have different pressures in the different gates. Boost pressures are only an approximation based on intake manifold pressures equaling exhaust manifold presure.


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