sabretooth wrote:Bending the rod won't change that it opens at 9psi - just that it'd open to 100% quicker when 9psi is reached. Although that theory could be wrong
The helper spring certainly sounds like it'd work to me - and as Warpspeed has posted - it does. The helper spring would mean that less pressure is required on the wastegate actuator's internal diaphragm as pressure is already being applied by the spring. The trick though, would be to get the correct spring rating to create a wastegate that opens at 5psi. Perhaps you can rig up the fishing scales and use those as the helper spring...
Now that Warpspeed and you mention it Sabre I seem to remember seeing something along these lines on either the big forum or the miata turbo forum. Certainly worth a try.
J
