Tag: tuning

Volvo S80 2.4T ProPerfekt CBV / Diverter / Blowoff Valve

I actually wasn’t planning to upgrade the OEM Compressor Bypass Valve (CBV), but I am glad I decided to do so with this ProPerfekt piston type Diverter Valve (DV).

The rubber rings don’t leak (so much) boost, which means the power output is better (and faster) compared to the stock CBV. The stock CBV has a rubber outer ring (diaphragm) and a plastic ring on the inside (this is the flaw in the design).

The ProPerfekt DV is a known mod with the Renault Megane RS drivers, but I haven’t seen it before on another Volvo forum. The results are clear to me, the boost buildup is quicker, which means the car is faster. I would recommend this mod to anyone who has a TD04 turbo (who is still using the stock CBV). My S80 has the TD04HL-13T turbo, but will also fit the TD04HL-16T. Please note that the CBV I had fitted is quite new, so no ruptured diaphragm or something.

Volvo S80 2.4T ProPerfekt Diverter Valve
Volvo S80 2.4T ProPerfekt Diverter Valve
Volvo S80 2.4T ProPerfekt Diverter Valve
Volvo S80 2.4T ProPerfekt Diverter Valve

And this is how it compares to the stock CBV.

Volvo S80 2.4T ProPerfekt Diverter Valve
Volvo S80 2.4T ProPerfekt Diverter Valve
Volvo S80 2.4T ProPerfekt Diverter Valve



Volvo S80 2.4T Do88.se Blue Silicone Intercooler Hoses

Replaced some old deteriorated intercooler hoses with new fresh Do88.se blue silicone hoses, which do not collapse anymore. I solved a hiccup when flooring the car from low rpm (due to sturdiness of the new hoses).

Volvo S80 2.4T DO88.se Intercooler hoses

Volvo S80 2.4T DO88.se Intercooler hose

Volvo S80 2.4T DO88.se Intercooler hose

Volvo S80 2.4T Old vs New Silicone hose

Volvo S80 2.4T Old Deteriorated Rubber hose

Volvo S80 2.4T DO88.se Silicone vs OEM Turbo hose

Volvo S80 2.4T Silicone Intercooler hose

Volvo S80 2.4T Silicone Intercooler hose

Volvo S80 2.4T Engine Bay




Volvo S80 2.4T Polybush Gearbox Mount

My front gearbox mount was shot. Found a polybush replacement part which is a easy swap. Remove 4x 18mm bolts, swap the part and tighten the 4x 18mm bolts. Noticed a big improvement in pickup and shift handling. The engine/gearbox is able to move much less, which helps in driveability.

Volvo S80 2.4T PU Gearbox mount

Volvo S80 2.4T New vs Old Gearbox mount

Volvo S80 2.4T New vs Old Gearbox mount

Volvo S80 2.4T PU Gearbox mount