Information
- it is born to remove the so-called “water hammer” owed to the sudden increase of the pressure in the duct between compressor and the throttle body;
- the compressor bypass valve or CBV loses that noisiness appreciated by many people;
Description
The pop-off valve is also known as air recirculation valve a or dump valve . It was born to eliminate the water hammer due to the sudden increase in pressure in the duct between the compressor and the throttle body when, with the engine under load and with turbo at high revs, the accelerator is removed or when the butterfly on the throttle body is closed . The air from the delivery duct after the compressor is recirculated in suction before the latter.
The free discharge solutions are only a free interpretation not supported by any technical reason. Of course the recirculated pop off loses the noise that many people enjoy.
For this product category SAITO proposes the pop-off valve that is mounted on the turbo 49373-03012 (OE 55243431.01) for Fiat 500, Panda, Punto, Lancia Ypsilon, Alfa Mito with Fiat SGE engine – Twinair 0.9 THE. Of this engine we have recently talked about some problems related to supercharging:
► https://www.saito.it/2781/manutenzione-del-collettore-scarico-del-sistema-waste-gate-motore-fiat-sge-twinair-0-9-litri
► https://www.saito.it/4530/caso-della-settimana-problematica-tubo-mandata-aria-panda-twinair-0-9l
| VALVE CODE | VALVE CONSTRUCTOR | TURBOCHARGER NUMBER | OEM TURBO NUMBER | TURBO CONSTRUCTOR | TURBO MODEL | APPLICATION | |
| 7.02909.07.0 | PIERBURG | 49373-03012 | 55243431.01 | TD02H2 | MITSUBISHI | FIAT 500 FIAT PANDA FIAT PUNTO LANCIA YPSILON ALFA MITO |
displacement: 0.9L power: 63 Kw fuel: Benzina |
