To get the effect you want from your new Blowoff Valve is to use the correct setup for your current engine specification.
We have for our 50 mm Blowoff Valve three different springs to choose from, and to let you know which one suits you here below is as chart to give you a guide.
Spring Pressure Chart
Engine Vacuum Reading / Color
Between:
0,50 – 0,75 bar | 7,25 – 10,9 psi : BLACK
0,35 – 0,50 bar | 5,07 – 7,25 psi : BLUE
0,00 – 0,35 bar | 0,00 – 5,07 psi : WHITE
**Measure engine vacuum at idle. (engine at operating temperature)
![ecumaster-emu-black-ecu-1096-p[ekm]600x401[ekm].jpg](https://www.rushworthperformance.com/wp-content/uploads/2021/03/7b3788_73867f5acdda4b268ba9ec90235407e0mv2.jpg)
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