[Tom Vaught]

Today I will try to add a couple of Extra Images to the discussion. The First Image is the Vortech "Mondo" Compressor By-Pass Valve.
Rarely though is it used in By-pass Mode, most times it is plumbed to just dump air into the engine bay when the throttle is closed.

Years ago, a PY Member, had a Trans Am with the home built Procharger Belt Driven Supercharger installed on the engine.
He had a By-pass valve installed but decided that it would be cool to route the discharged air thru a couple of hoses to the
Fender Extractor Vents location on his Trans Am.

He would come to Norwalk, get the car to the line, stage the car, blast off the line and some distance off the line his wife would be waiting to pick up the supercharger belt that would be laying on the track.

Part of this issue was the Brackets were a early design from a guy named Bruno in New Jersey and were not really that good at
not allowing the Supercharger to move. If the supercharger moves, the belt comes off.

The second part of the issue was the Hose on the Bypass Valve could not dump the excess air fast enough so the Supercharger
still had a SURGE ISSUE. Car was fast if he never had to pedal it. Pedal it and the belt came off.
The cause was the Compressor By-pass Valve Plumbing (extra hose routing).

A Second Cause was the way the by-pass valve was installed in the piping. It needed to be on the outside curve of the plumbing so that if the end of the curve was blocked (Throttle shut) the air took the "Off-ramp" vs having to do a 90 degree "Stop Sign" turn.

I have added the Turbonetics Godzilla By-pass Valve (center) and a schematic of a closed throttle flow schematic thru the CBV.
The point being, high rpm "Closed Throttle" Pressure spikes will cause parts to fail. Holley carb blades to bend, hoses to be blown off,
turbos to have bearing thrust issues and fail, Belts to be laying on the street. You really need to pay attention to the plumbing.

Wreckmaster mentioned in a post on the board about adding a third CBV to his plumbing (after the inter-cooler) to relieve the pressure spike from the throttle blade being closed and the inter-cooler being between his other CBV valves. Inter-cooler was basically blocking the back flow from the throttle and the potential for failure of the piece was high. He is running EFI vs a Holley Carb but the issue was the same.

Tom V.