Problem with mod sound

[Axlslo]

When ever I install a mod the sound is same every time. I'm trying to get F1 2014 WCP 3.0 running but the sound is just horrible. The engine is quiet until I get to the middle of the gear with RPM then it just sound very "lame". I'm pretty sure rFactor is not using the sound that comes with the mod. I have no idea how to fix this if you have any idea please reply here or PM me your steam so we can chat a bit faster and try to fix the issue I have.

Thanks for help

 

[Axlslo]

Video example of the sound I get..