Originally Posted by cbr600rx7
Yes i used the factory spring. The more you tighten the spring the more pressure it takes to close the waste gate. I have not tried to push it to see how much boost you can get out of the factory spring but there is still a good bit of adjustment that could be made for guys wanting to run more boost.
Remember....Yours is not vacuum controlled in a 93, you won't find that spring inside a vacuum WG actuator. This won't work with a 94 and newer actuator.