today i bumped my timing about an 1/8 went for a ride and i can tell the diff my buddy said that its smokeing more but im not sure now i can pull about 3400 rpm and run about the same boost about 44 psi. i would like to upgrade my valve springs but were can i find them. and i also here that you only have to do one either the exhaust or intake..

 

Welcome to DTR! Any of the vendors here can get ahold of the 60psi springs. When adding an exhaust brake, only the exhaust side needs to be upgraded. You need to do both sides--valve float does not descriminate

greg
edit--you'll smoke more down low because the turbo will tend to lag a bit more with advanced timing.