Ok, this may have been covered...but I'm posting this anyway...

I took some pics of my engine compartment and I noticed on the back of the supercharger there is an allen screw. What does this control...??



This is an orientation pic to put you in the right area



I know with my old R/T that you could control the throttle kickdown by adjusting the amount of space there was near the throttle body.
I wonder if this is something similar or maybe a thing to control vacuum.....

 

i believe that this is your "Blow off" valve to prevent the supercharge from creating a negative boost to the engine wich is very bad but i might be wrong

 

I know we are either under vacuum or boost....I think I heard that we were under vacuum 95% of the time and boost the rest.
There is a plunger of some sort, and that allen screw controls it somehow....I aint messing with it until I get a 'techie' point of view...

 

https://www.cobaltss.net/forums/show...9&page=2&pp=20

See posts #34, 35 ...

 

Thanks... seems you've had this on your mind before

Let me get this straight first.
The position of that screw dictates the opening or closing of the actuator, which dictates boost/vacuum pressure.

Has there been a 'benchmark' position made for these screws..? or is it mainly up to personal preference.?
I see that if 12lbs of boost is made it wont make more. I am real close to 12.5lbs now...
all in all, its great info

thanks again

 

That is the bypass valve. The screw adjusts the point where the valve closes. Changing it might prevent the butterfly valve from closing correctly. If that happens you lose boost.

 

Doesn't the valve inside the S/C have a stop also? Doesn't it sit inside of a machined plate?

SO it can't really go to far closed can it?

 

is there a way to find the maximum boost point. or is it set close enough at the factory. Could this be the reason many people are not getting 12.5psi