Quote:
Originally Posted by DrBacon
There's definitely belt dust around on the backside. Correct me if I'm wrong, but I thought centrifugal superchargers built boost linearly to RPM unless there's a restriction. I suppose that filter is a pretty heavy restriction though. I'm going to attempt to tighten that belt tomorrow. Any idea on how tight it should be? I guess until it stops slipping, however there's already only a very, very small amount of movement when I push on the belt as is.
 |
Belt slip is what I expected in the beginning, although it is not visible in the first attached pic you showed to us (the surface of the backside is shielded). Try to tighten the belt as tight as possible until it is foiled in any attempt to flip it. I've had a hard time in dealing with my friend's build (which was mainly built by me, my mechanic, and my tuner) of the 928 wheel and filter. We found belt dust around the bracket and even used heat gun to check these two belts.
https://www.instagram.com/p/BxOYNS6n...=1efdk158o36mp
https://www.instagram.com/p/BxUEwWjF...d=nccm677eqi3i
We used a larger lower idler custom one off and RPM belt on the supercharger side to solve it. He's having the similar setup on the serpentine side as yours.
https://www.instagram.com/p/ByDHTcPA...d=1cjlg185ac4b
or
https://www.instagram.com/p/Bx5Al-in...=1ukdsx8trl0zy
Back to your problem, I think the Omni MAP sensor shouldn't be that fragile unless it was damaged during installing it. And yes the filter is indeed a restriction. You'll loose at least 3 psi roughly when putting the filter on. Your system will be more susceptible to the belt slip with the filter on, like you wear a mask to breath. You will have to breath (spin it) harder and that's exactly the case your blower is undergoing. I personally think it's barely possible to achieve more than 15ish psi if your using the filter along with the poor little V3 Sci/Si trims of the 8-rib drive pulley. Will be busy dealing with belt slip in addition to the supercharger oil potentially coming out of the head unit. Try to use 36225 lower idler if you still see the dust after every effort you have done to tighten the supercharger belt. I'm assuming your using the Gates 7pk2642 belt on the serpentine side. I'd not suggest you consider using the RPM belt if your running the stock self-lubricated Vortech internals and the current pulley combination (shouldn't be needed to use the RPM belt right now).