[Build Thread] -- Journey to 700+ WHP [Supercharger]

[cupcakez]

Lol.

i went for some driving right now cuz theres nobody out and i heard a PLAP! and all the sudden lights turned off, got really foggy in my car cuz it was drizzling rain, and battery light turns on, brake light turns on. steering wheel becomes stiff because power steering is no longer in session. so thankfully i was like 5 min away from home so i drove home and i made it home safely.

opened the hood.

found out the serpentine belt slipped off the system.
OOPS!!!!

You can also see the belt how it was rubbing against the overflow tank, lol.
I need to really sand that part down of the overflow tank that way it won't happen again.

Going to try to find out what the cause of this belt slipping off was.

I was driving it all day today under casual daily driving conditions -- no hard pulls or anything and it was fine. The moment I made 9psi and pushed it a bit hard, i heard the PLAP!

So it seems under high RPMS it slipped, but low RPMS it was fine.
Hmm.... I wonder what the issue is.

Possible Causes I can think of:
(1) One or more of the three pulley bolts we touched was not torqued down enough (Bottom Idler, Top Idler on the SC bracket / 9 PSI pulley on jackshaft serpentine side).

(2) Whole bracket was not tight enough so it flexed and caused this to slip off?

(3) Auto-tensioner went bad somehow?

(4) Any one have any other ideas?


Also, does anyone know what the torque specs are for these pulleys? Are they all the same or are they different for each pulley?

I have the two idler pulleys on the front of the SC bracket (Top stock one, and bottom idler pulley of the SC bracket). Then I have the 9psi pulley. I looked as much as I could but could not find any information on the torque specs for these pulleys on the bracket. Even the Stillen SC manual does not state it!)

Thanks guys!

PS -- I understand that as the belt is heated up it expands in diameter a tiny bit, so maybe that's what could have caused it? No idea.
Any feedback is welcome and thanked!!