I had a giant one- it started movement at 4psi and was fully open by 14psi on the bench. I was getting a similar spread on the car - preloading the actuator just raised the start and peak boost while only narrowing the rise difference by a small margin.
Here's that actuator installed: http://i158.photobucket.com/albums/t86/m2cupcar/current%20FEmx5t/ IMG_4798x.jpg http://i158.photobucket.com/albums/t86/m2cupcar/current%20FEmx5t/ IMG_4799x.jpg Believe me, the spring in that one is strong - I can't pull it out with my hand. I had to use compressed air to preload it. I had a cheap chinese unit prior that actually worked quite well for a stable WG base with a helper spring, but it fell apart. http://i158.photobucket.com/albums/t86/m2cupcar/current%20FEmx5t/ actuator640.jpg I've noticed that forge has an internal actuator that uses an external WG diaphragm and springs - rebuildable and tunable, but at the price of an external gate. On Apr 7, 2009, at 3:52 PM, Jason C wrote: > Can you get a wastegate with a larger can diameter? > > A larger can means the spring is stronger for a given PSI setting, > and fights the wastegate blowing open better. > > And, a wastegate can that goes from cracking open to fully extended > over fewer PSI (e.g. 5-8 psi instead of 5-15 psi), will have more > "feedback gain" and give you a flatter boost curve. > _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
