Quote: Originally Posted by
mad1 
What is the boost at? The wastegate spring doesn't mean much on externals. I can boost 24 lbs on the big spring ( 11 lbs or ?). But 10 lbs on a 3147 is alot more air and pressure than a stock turbo.
It is just the 10 lb spring alone. Boost is at 10 psi to redline.