Now can someone please explain to me how the wastegate works on our cars and why did GM put the wastegate to vent back into the superchager and not vent it into the air.

 

there is not waste gate on our cars

 

than how dose the boost bleed off

 

I think you are thinking of the by-pass valve.

Here:



In a nutshell, it is to minimize parasitic loss from the supercharger when you don't need the power.

 

Boost by pass valve our cars dont have a wastegate.

 

well basicly it acts like a wastegate would almost with bleeding off boost right

o and thnaks for the vid it really help i better understand it now

 

It's very simple at low throttle, that bypass valve (what you call a wastegate) is open.

If it vented to the air your motor would be taking in unmetered air, after the throttle body would would result in a very lean mixture and probably some codes or even worse.

 

A wastegate is on the exhaust side of a turbocharger to release the pressure off the exhaust turbine to help improve the life of the turbocharger. A blow off valve or bypass valve is on the intake side of a turbocharger and essentially does the same thing but on the impeller.

We have a bypass that snaps shut once boost is needed, but is open in nonboost situations. I really doesn't serve the same purpose as a bypass on a turbo but it essentially does the same thing.

 

 

Good explination but I would say rather than "improving the life", which it somewhat does by keeping it from overspinning but I would say it maintains a certain turbine RPM speed, which results in, maintaining a certain boost pressure being created by the compressor wheel.